ZVS Regulators PI33xx-x0 8 – 36V ZVS Buck Regulator Family IN Product Description Features & Benefits The PI33xx-x0 is a family of high-efficiency, wide-input-range • High-efficiency ZVS Buck topology DC-DC ZVS Buck regulators integrating controller, power • Wide input voltage range of 8 – 36V switches and support components all within a high-density System-in-Package (SiP). The integration of a high-performance • Very-fast transient response Zero-Voltage Switching (ZVS) topology, within the PI33xx-x0 series, • High-accuracy pre-trimmed output voltage increases point-of-load performance providing best-in-class power efficiency. The PI33xx-x0 requires only an external inductor and • User-adjustable soft start & tracking minimal capacitors to form a complete DC-DC switching-mode • Power-up into pre-biased load (select versions) Buck Regulator. • Parallel capable with single-wire current sharing Output Voltage • Input Over/Undervoltage Lockout (OVLO/UVLO) Device I Max OUT Set Range • Output Overvoltage Protection (OVP) PI3311-x0 1.0V 1.0 – 1.4V 10A • Overtemperature Protection (OTP) PI3318-x0 1.8V 1.4 – 2.0V 10A • Fast and slow current limits PI3312-x0 2.5V 2.0 – 3.1V 10A • –40°C to 125°C operating range (T) J PI3301-x0 3.3V 2.3 – 4.1V 10A • Optional I2C™ * functionality & programmability: PI3302-x0 5.0V 3.3 – 6.5V 10A „„V margining OUT PI3303-x0 12V 6.5 – 13.0V 8A „„Fault reporting PI3305-x0 15V 10.0 – 16.0V 8A „„Enable and SYNCI pin polarity „„Phase delay (interleaving multiple regulators) The ZVS architecture also enables high-frequency operation while minimizing switching losses and maximizing efficiency. Applications The high-switching-frequency operation reduces the size of the external filtering components, improves power density, and • High-Efficiency Systems enables very fast dynamic response to line and load transients. • High-Voltage Battery Operation The PI33xx-x0 series sustains high switching frequency all the way up to the rated input voltage without sacrificing efficiency and, with its 20ns minimum on-time, supports large step-down Package Information conversions up to 36V . IN • 10 x 14 x 2.6mm LGA SiP ZVS Regulators Rev 2.6 Page 1 of 42 04/2020

PI33xx-x0 Contents Order Information 3 Application Description 35 I2C™ Functionality & Programmability 3 Output Voltage Trim 35 Absolute Maximum Ratings 3 Soft-Start Adjust and Tracking 36 Functional Block Diagram 4 Inductor Pairing 37 Pin Description 5 Thermal De-Rating 37 Package Pinout 6 Filter Considerations 37 PI3311-x0-LGIZ (1.0V ) Electrical Characteristics 7 Layout Guidelines 38 OUT PI3318-x0-LGIZ (1.8V ) Electrical Characteristics 10 Recommended PCB Footprint and Stencil 39 OUT PI3312-x0-LGIZ (2.5V ) Electrical Characteristics 13 Package Drawings 40 OUT PI3301-x0-LGIZ (3.3V ) Electrical Characteristics 17 Revision History 41 OUT PI3302-x0-LGIZ (5.0V ) Electrical Characteristics 21 Warranty 42 OUT PI3303-x0-LGIZ (12.0V ) Electrical Characteristics 25 OUT PI3305-x0-LGIZ (15.0V ) Electrical Characteristics 29 OUT Functional Description 33 ENABLE (EN) 33 Remote Sensing 33 Switching Frequency Synchronization 33 Soft Start 33 Output Voltage Trim 33 Output Current Limit Protection 34 Input Undervoltage Lockout 34 Input Overvoltage Lockout 34 Output Overvoltage Protection 34 Overtemperature Protection 34 Pulse Skip Mode (PSM) 34 Variable Frequency Operation 34 Parallel Operation 34 I2C Interface Operation 35 ZVS Regulators Rev 2.6 Page 2 of 42 04/2020

PI33xx-x0 Order Information Output Range Transport Part Number I Max Package Set Range OUT Media PI3311-00-LGIZ 1.0V 1.0 – 1.4V 10A 10 x 14mm 123-pin LGA TRAY PI3318-00-LGIZ 1.8V 1.4 – 2.0V 10A 10 x 14mm 123-pin LGA TRAY PI3312-00-LGIZ 2.5V 2.0 – 3.1V 10A 10 x 14mm 123-pin LGA TRAY PI3301-00-LGIZ 3.3V 2.3 – 4.1V 10A 10 x 14mm 123-pin LGA TRAY PI3302-00-LGIZ 5.0V 3.3 – 6.5V 10A 10 x 14mm 123-pin LGA TRAY PI3303-00-LGIZ 12V 6.5 – 13.0V 8A 10 x 14mm 123-pin LGA TRAY PI3305-00-LGIZ 15V 10.0 – 16.0V 8A 10 x 14mm 123-pin LGA TRAY I2C™ Functionality & Programmability Output Range Transport Part Number I Max Package Set Range OUT Media PI3311-20-LGIZ 1.0V 1.0 – 1.4V 10A 10 x 14mm 123-pin LGA TRAY PI3318-20-LGIZ 1.8V 1.4 – 2.0V 10A 10 x 14mm 123-pin LGA TRAY PI3312-20-LGIZ 2.5V 2.0 – 3.1V 10A 10 x 14mm 123-pin LGA TRAY PI3301-20-LGIZ 3.3V 2.3 – 4.1V 10A 10 x 14mm 123-pin LGA TRAY PI3302-20-LGIZ 5.0 V 3.3 – 6.5V 10A 10 x 14mm 123-pin LGA TRAY PI3303-20-LGIZ 12V 6.5 – 13.0V 8A 10 x 14mm 123-pin LGA TRAY PI3305-20-LGIZ 15V 10.0 – 16.0V 8A 10 x 14mm 123-pin LGA TRAY Absolute Maximum Ratings Name Rating VIN –0.7 to 36V VS1 –0.7 to 36V DC SGND 100mA PWRGD, SYNCO, SYNCI, EN, EAO, ADJ, TRK, ADR1, ADR2, SCL, SDA, REM –0.3 to 5.5V / 5mA PI3311-x0-LGIZ –0.3 to 5.5V PI3318-x0-LGIZ –0.5 to 9V PI3312-x0-LGIZ –0.8 to 13V VOUT PI3301-x0-LGIZ –1.0 to 18V PI3302-x0-LGIZ –1.5 to 21V PI3303-x0-LGIZ –3.6 to 25V PI3305-x0-LGIZ –4.5 to 25V Storage Temperature –65 to 150°C Operating Junction Temperature –40 to 125°C Soldering Temperature for 20 seconds 245°C ESD Rating 2kV HBM Notes: At 25°C ambient temperature. Stresses beyond these limits may cause permanent damage to the device. Operation at these conditions or conditions beyond those listed in the Electrical Specifications table is not guaranteed. All voltage nodes are referenced to PGND unless otherwise noted. Test conditions are per the specifications within the individual product electrical characteristics. ZVS Regulators Rev 2.6 Page 3 of 42 04/2020

PI33xx-x0 Functional Block Diagram VIN VIN VS1 VOUT Q2 VOUT Q1 R4 REM Power R1 EAO Control VCC ADJ ZVS Control - + 1V R2 SYNCO SYNCI PWRGD EN Memory Interface TRK PGND 0Ω SGND SCL SDA ADR0 ADR1 Simplified block diagram (I2C™ pins SCL, SDA, ADR0, and ADR1 only active for PI33xx-20 device versions) ZVS Regulators Rev 2.6 Page 4 of 42 04/2020

PI33xx-x0 Pin Description Pin Name Number Description Signal Ground: Internal logic ground for EA, TRK, SYNCI, SYNCO, ADJ and I2C™ (options) SGND Block 1 communication returns. SGND and PGND are star connected within the regulator package. PGND Block 2 Power Ground: VIN and VOUT power returns. VIN Block 3 Input Voltage: and sense for UVLO, OVLO and feed-forward ramp. VOUT Block 5 Output Voltage: and sense for power switches and feed-forward ramp. VS1 Block 4 Switching Node: and ZVS sense for power switches. Power Good: High impedance when regulator is operating and V is in regulation. Otherwise pulls to SGND. Also PWRGD A1 OUT can be used for parallel timing management intended for lead regulator. EAO A2 Error Amp Output: External connection for additional compensation and current sharing. Enable Input: Regulator enable control. Asserted high or left floating – regulator enabled; EN A3 Asserted low, regulator output disabled. Polarity is programmable via I2C interface. REM A5 Remote Sense: High-side connection. Connect to output regulation point. Adjust Input: An external resistor may be connected between ADJ pin and SGND or VOUT ADJ B1 to trim the output voltage up or down. Soft-Start and Track Input: An external capacitor may be connected between TRK pin and SGND to decrease the TRK C1 rate of rise during soft start. NC A4 No Connect: Leave pins floating. VDR can only be used for ADR0 and ADR1 pull-up reference voltage. VDR K3 No other external loading is permitted Synchronization Output: Outputs a low signal for ½ of the minimum period for synchronization of other convert- SYNCO K4 ers. Synchronization Input: Synchronize to the falling edge of external clock frequency. SYNCI is a high-impedance SYNCI K5 digital input node and should always be connected to SGND when not in use. SDA D1 Data Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only. SCL E1 Clock Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only. ADR1 H1 Tri-state Address: No connect for PI33xx-00. For use with PI33xx-20 only. ADR0 G1 Tri-state Address: No connect for PI33xx-00. For use with PI33xx-20 only. ZVS Regulators Rev 2.6 Page 5 of 42 04/2020

PI33xx-x0 Package Pinout A D E G K PPWGRDG/D ADJ TRK SDA SCL SGND ADR0 ADR1 SGND SGND EAO SGND SGND SGND SGND SGND SGND SGND SGND SGND EN SGND SGND SGND SGND SGND SGND SGND SGND VDR NC SGND SGND PGND PGND PGND PGND PGND SYNCO REM PGND PGND PGND PGND PGND SYNCI VOUT VOUT VOUT VOUT PGND PGND PGND PGND PGND PGND VOUT VOUT VOUT VOUT PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND VS1 VS1 VS1 VS1 VS1 VIN VIN VIN VIN VS1 VS1 VS1 VS1 VS1 VIN VIN VIN VIN VS1 VS1 VS1 VS1 VS1 VIN VIN VIN VIN PI34xx-00 Pin Block Name Group of pins SGND B2-4, C2-4, D2-3, E2-3, F1-3, G2-3, H2-3, J1-3, K1-2 PGND A8-10, B8-10, C8-10, D8-10, E4-10, F4-10, G4-10, H4-10, J4-10, K6-10 VIN G12-14, H12-14, J12-14, K12-14 VS1 A12-14, B12-14, C12-14, D12-14, E12-14 VOUT A6-7, B6-7, C6-7, D6-7 ZVS Regulators Rev 2.6 Page 6 of 42 04/2020

PI33xx-x0 PI3311-x0-LGIZ (1.0V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 125nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V 8 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I =10A 476 mA IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 0.987 1.0 1.013 V OUT_DC Output Voltage Trim Range V [c] 1.0 1.4 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple V I = 5A, C = 8 x 100μF, 20MHz BW [d] 20 mV OUT_AC OUT OUT P-P Continuous Output I [e] Minimum 1mA load required 0.001 10 A Current Range OUT_DC Current Limit I 12 A OUT_CL Protection V UVLO Start Threshold V 7.10 7.60 8.00 V IN UVLO_START V UVLO Stop Threshold V 6.80 7.25 7.60 V IN UVLO_STOP V UVLO Hysteresis V 0.33 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. ZVS Regulators Rev 2.6 Page 7 of 42 04/2020

PI33xx-x0 PI3311-x0-LGIZ (1.0V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 125nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 500 kHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V Internal reference tracking range 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. ZVS Regulators Rev 2.6 Page 8 of 42 04/2020

PI33xx-x0 PI3311-x0-LGIZ (1.0V ) Electrical Characteristics (Cont.) OUT 100 95 90 cy 85 n e 80 ci Effi 75 70 65 60 55 50 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 1 — Efficiency at 25°C Figure 4 — Transient response 2A to 7A, at 5A/µs Figure 2 — Short circuit test Figure 5 — Output ripple 24V , 1.0V at 10A IN OUT 600 500 z) H k 400 y ( nc 300 e u q e 200 r F 100 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 3 — Switching frequency vs. load current Figure 6 — Output ripple 24V , 1.0V at 5A IN OUT ZVS Regulators Rev 2.6 Page 9 of 42 04/2020

PI33xx-x0 PI3318-x0-LGIZ (1.8V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 155nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V 8 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I =10A 835 mA IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 1.773 1.8 1.827 V OUT_DC Output Voltage Trim Range V [c] 1.4 2.0 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple V I = 5A, C = 6 x 100μF, 20MHz BW [d] 25 mV OUT_AC OUT OUT P-P Continuous Output I [e] Minimum 1mA load required 0.001 10 A Current Range OUT_DC Current Limit I 12 A OUT_CL Protection V UVLO Start Threshold V 7.10 7.60 8.00 V IN UVLO_START V UVLO Stop Threshold V 6.80 7.25 7.60 V IN UVLO_STOP V UVLO Hysteresis V 0.33 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. ZVS Regulators Rev 2.6 Page 10 of 42 04/2020

PI33xx-x0 PI3318-x0-LGIZ (1.8V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 155nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 600 kHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V Internal reference tracking range 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. ZVS Regulators Rev 2.6 Page 11 of 42 04/2020

PI33xx-x0 PI3318-x0-LGIZ (1.8V ) Electrical Characteristics (Cont.) OUT 100 95 90 y 85 c n e 80 Effici 7750 65 60 55 50 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 8V V = 12V V = 24V V = 36V IN IN IN IN Figure 7 — Efficiency at 25°C Figure 10 — Transient response 2A to 7A, at 5A/µs Figure 8 — Short circuit test Figure 11 — Output ripple 24V , 1.8V at 10A IN OUT 700 600 z) H500 k y (400 c n ue300 q e r200 F 100 0 1 2 3 4 5 6 7 8 9 10 Load Current (A) V : 8V 12V 24V 36V IN Figure 9 — Switching frequency vs. load current Figure 12 — Output ripple 24V , 1.8V at 5A IN OUT ZVS Regulators Rev 2.6 Page 12 of 42 04/2020

PI33xx-x0 PI3312-x0-LGIZ (2.5V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V [g] 8 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I = 10A 1.14 A IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 2.465 2.500 2.535 V OUT_DC Output Voltage Trim Range V [c] [g] 2.0 2.5 3.1 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple V I = 5A, C = 4 x 100μF, 20MHz BW [d] 28 mV OUT_AC OUT OUT P-P Continuous Output I [e] [g] 10 A Current Range OUT_DC Current Limit I 12 A OUT_CL Protection V UVLO Start Threshold V 7.10 7.60 8.00 V IN UVLO_START V UVLO Stop Threshold V 6.80 7.25 7.60 V IN UVLO_STOP V UVLO Hysteresis V 0.33 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 13 of 42 04/2020

PI33xx-x0 PI3312-x0-LGIZ (2.5V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 500 kHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V Internal reference tracking range 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 14 of 42 04/2020

PI33xx-x0 PI3312-x0-LGIZ (2.5V ) Electrical Characteristics (Cont.) OUT 95 90 85 y c 80 n cie 75 Effi 70 65 60 55 50 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 13 — Efficiency at 25°C Figure 16 — Transient response 5A to 10A, at 5A/µs Figure 14 — Short circuit test Figure 17 — Output ripple 24V , 2.5V at 10A IN OUT 600 500 z) H k400 y ( nc300 e u eq200 r F 100 0 1 2 3 4 5 6 7 8 9 10 Load Current (A) V : 12V 24V 36V IN Figure 15 — Switching frequency vs. load current Figure 18 — Output ripple 24V , 2.5V at 5A IN OUT ZVS Regulators Rev 2.6 Page 15 of 42 04/2020

PI33xx-x0 PI3312-x0-LGIZ (2.5V ) Electrical Characteristics (Cont.) OUT 12 10 A) nt ( 8 e r r 6 u C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 19 — Load current vs. ambient temperature, 0LFM 12 10 A) nt ( 8 e rr 6 u C d 4 a o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 20 — Load current vs. ambient temperature, 200LFM 12 10 A) nt ( 8 e r r u 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 21 — Load current vs. ambient temperature, 400LFM ZVS Regulators Rev 2.6 Page 16 of 42 04/2020

PI33xx-x0 PI3301-x0-LGIZ (3.3V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V [g] 8 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I =10A 1.49 A IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 3.25 3.30 3.36 V OUT_DC Output Voltage Trim Range V [c] [g] 2.3 3.3 4.1 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple V I = 5A, C = 4 x 100μF, 20MHz BW [d] 37.5 mV OUT_AC OUT OUT P-P Continuous Output I [e] 10 A Current Range OUT_DC Current Limit I 12 A OUT_CL Protection V UVLO Start Threshold V 7.10 7.60 8.00 V IN UVLO_START V UVLO Stop Threshold V 6.80 7.25 7.60 V IN UVLO_STOP V UVLO Hysteresis V 0.33 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 17 of 42 04/2020

PI33xx-x0 PI3301-x0-LGIZ (3.3V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 650 kHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V Internal reference tracking range 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 18 of 42 04/2020

PI33xx-x0 PI3301-x0-LGIZ (3.3V ) Electrical Characteristics (Cont.) OUT 100 95 90 y 85 c en 80 Effici 7750 65 60 55 50 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 22 — Efficiency at 25°C Figure 25 — Transient response 2A to 7A, at 5A/µs Figure 23 — Short circuit test Figure 26 — Output ripple 24V , 3.3V at 10A IN OUT 700 600 z) H 500 k y ( 400 c n e 300 u q e r 200 F 100 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 24 — Switching frequency vs. load current Figure 27 — Output ripple 24V , 3.3V at 5A IN OUT ZVS Regulators Rev 2.6 Page 19 of 42 04/2020

PI33xx-x0 PI3301-x0-LGIZ (3.3V ) Electrical Characteristics (Cont.) OUT 12 10 A) nt ( 8 e r ur 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 28 — Load current vs. ambient temperature, 0LFM 12 10 A) nt ( 8 e r r u 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 29 — Load current vs. ambient temperature, 200LFM 12 10 A) nt ( 8 e r ur 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 30 — Load current vs. ambient temperature, 400LFM ZVS Regulators Rev 2.6 Page 20 of 42 04/2020

PI33xx-x0 PI3302-x0-LGIZ (5.0V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V [g] 8 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I =10A 2.23 A IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 4.93 5.00 5.07 V OUT_DC Output Voltage Trim Range V [c] [g] 3.3 6.5 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V <VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A <IOUT < 10A 0.10 % Output Voltage Ripple V I = 5A, C = 4 x 47μF, 20MHz BW [d] 30 mV OUT_AC OUT OUT P-P Continuous Output I [e] [g] 10 A Current Range OUT_DC Current Limit I 12 A OUT_CL Protection V UVLO Start Threshold V 7.10 7.60 8.00 V IN UVLO_START V UVLO Stop Threshold V 6.80 7.25 7.60 V IN UVLO_STOP V UVLO Hysteresis V 0.33 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 21 of 42 04/2020

PI33xx-x0 PI3302-x0-LGIZ (5.0V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 200nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 1.0 MHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 22 of 42 04/2020

PI33xx-x0 PI3302-x0-LGIZ (5.0V ) Electrical Characteristics (Cont.) OUT 100 95 90 y 85 c en 80 Effici 7750 65 60 55 50 0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 31 — Efficiency at 25°C Figure 34 — Transient response 2A to 7A, at 5A/µs Figure 32 — Short circuit test Figure 35 — Output ripple 24V , 5.0V at 10A IN OUT 1.2 1.0 z) H M 0.8 y ( c 0.6 n e u eq 0.4 r F 0.2 0.0 1 2 3 4 5 6 7 8 9 10 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 33 — Switching frequency vs. load current Figure 36 — Output ripple 24V , 5.0V at 5A IN OUT ZVS Regulators Rev 2.6 Page 23 of 42 04/2020

PI33xx-x0 PI3302-x0-LGIZ (5.0V ) Electrical Characteristics (Cont.) OUT 12 10 A) nt ( 8 e r ur 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 37 — Load current vs. ambient temperature, 0LFM 12 10 A) nt ( 8 e r ur 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 38 — Load current vs. ambient temperature, 200LFM 12 10 A) nt ( 8 e r ur 6 C d a 4 o L 2 0 50 75 100 125 Ambient Temperature (°C) V = 8V V = 24V V = 36V IN IN IN Figure 39 — Load current vs. ambient temperature, 400LFM ZVS Regulators Rev 2.6 Page 24 of 42 04/2020

PI33xx-x0 PI3303-x0-LGIZ (12.0V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 230nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V [g] 17.4 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I = 8A 4.15 A IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 11.82 12.0 12.18 V OUT_DC Output Voltage Trim Range V [c] [g] 6.5 12 13.0 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 8A 0.10 % Output Voltage Ripple V I = 4A, C = 4 x 22μF, 20MHz BW [d] 60 mV OUT_AC OUT OUT P-P Continuous Output I [e] 8 A Current Range OUT_DC Current Limit I 9 A OUT_CL Protection V UVLO Start Threshold V 15.80 16.60 17.40 V IN UVLO_START V UVLO Stop Threshold V 15.00 15.80 16.60 V IN UVLO_STOP V UVLO Hysteresis V 0.77 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 25 of 42 04/2020

PI33xx-x0 PI3303-x0-LGIZ (12.0V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 230nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 1.4 MHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 26 of 42 04/2020

PI33xx-x0 PI3303-x0-LGIZ (12.0V ) Electrical Characteristics (Cont.) OUT 100 95 90 %) 85 y ( 80 c n 75 e ci 70 Effi 65 60 55 50 0 1 2 3 4 5 6 7 8 Load Curent (A) V = 17.4V V = 24V V = 36V IN IN IN Figure 40 — Efficiency at 25°C Figure 43 — Transient response 4A to 8A, at 5A/µs Figure 41 — Short circuit test Figure 44 — Output ripple 24V , 12.0V at 8A IN OUT 1.6 1.4 z) 1.2 H M 1.0 y ( nc 0.8 e qu 0.6 e Fr 0.4 0.2 0.0 1 2 3 4 5 6 7 8 Load Curent (A) V = 17.4V V = 24V V = 36V IN IN IN Figure 42 — Switching frequency vs. load current Figure 45 — Output ripple 24V , 12.0V at 4A IN OUT ZVS Regulators Rev 2.6 Page 27 of 42 04/2020

PI33xx-x0 PI3303-x0-LGIZ (12.0V ) Electrical Characteristics (Cont.) OUT 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 18V V = 24V V = 36V IN IN IN Figure 46 — Load current vs. ambient temperature, 0LFM 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 18V V = 24V V = 36V IN IN IN Figure 47 — Load current vs. ambient temperature, 200LFM 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 18V V = 24V V = 36V IN IN IN Figure 48 — Load current vs. ambient temperature, 400LFM ZVS Regulators Rev 2.6 Page 28 of 42 04/2020

PI33xx-x0 PI3305-x0-LGIZ (15.0V ) Electrical Characteristics OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 230nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage V [g] 20.4 24 36 V IN_DC Input Current I V = 24V, T = 25°C, I = 8A 5.15 A IN_DC IN C OUT Input Current at Output Short I [b] 20 mA (Fault Condition Duty Cycle) IN_Short Disabled 2.0 mA Input Quiescent Current I Q_VIN Enabled (no load) 2.5 mA Input Voltage Slew Rate V 1 V/μs IN_SR Output Specifications Output Voltage Total Regulation V [b] 14.78 15.0 15.23 V OUT_DC Output Voltage Trim Range V [c] [g] 10.0 15 16 V OUT_DC Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.1 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 8A 0.1 % Output Voltage Ripple V I = 4A, C = 4 x 22μF, 20MHz BW [d] 60 mV OUT_AC OUT OUT P-P Continuous Output I [e] [g] 8 A Current Range OUT_DC Current Limit I 9 A OUT_CL Protection V UVLO Start Threshold V 18.4 19.4 20.4 V IN UVLO_START V UVLO Stop Threshold V 17.4 18.4 19.4 V IN UVLO_STOP V UVLO Hysteresis V 0.90 V IN UVLO_HYS V OVLO Start Threshold V 36.1 V IN OVLO_START V OVLO Stop Threshold V 37.0 38.4 V IN OVLO_STOP V OVLO Hysteresis V 0.77 V IN OVLO_HYS V UVLO/OVLO Response Time t 500 ns IN f Output Overvoltage Protection V Above V 20 % OVP OUT Overtemperature T 130 135 140 °C Fault Threshold OTP Overtemperature T 30 °C Restart Hysteresis OTP_HYS [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 29 of 42 04/2020

PI33xx-x0 PI3305-x0-LGIZ (15.0V ) Electrical Characteristics (Cont.) OUT Unless otherwise specified: –40°C < T < 125°C, V = 24V, L1 = 230nH [a] J IN Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency f [f] 1.5 MHz S Fault Restart Delay t 30 ms FR_DLY Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [c] 50 110 % SYNCI Threshold V 2.5 V SYNCI SYNCI Input Impedance Z 100 kΩ SYNCI Sync Out (SYNCO) SYNCO High V Source 1mA 4.5 V SYNCO_HI SYNCO Low V Sink 1mA 0.5 V SYNCO_LO SYNCO Rise Time t 20pF load 10 ns SYNCO_RT SYNCO Fall Time t 20pF load 10 ns SYNCO_FT Soft Start And Tracking TRK Active Input Range V 0 1.04 V TRK TRK Max Output Voltage 1.2 V TRK Disable Threshold V 20 40 60 mV TRK_OV Charge Current (Soft – Start) I 70 50 30 μA TRK Discharge Current (Fault) I V = 0.5V 6.8 mA TRK_DIS TRK Soft-Start Time t C = 0µF 2.2 ms SS TRK Enable High Threshold V 0.9 1 1.1 V EN_HI Low Threshold V 0.7 0.8 0.9 V EN_LO Threshold Hysteresis V 100 200 300 mV EN_HYS Enable Pull-Up Voltage V With positive logic EN polarity 2 V (Floating) EN_PU Enable Pull-Down Voltage V With negative logic EN polarity 0 V (Floating) EN_PD Source Current I With positive logic EN polarity 50 μA EN_SO Sink Current I With negative logic EN polarity 50 μA EN_SK [a] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [b] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [c] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V is modified. OUT [d] Refer to Output Ripple plots. [e] Refer to load current vs. ambient temperature curves. [f] Refer to switching frequency vs. load current curves. [g] Minimum 5V between V -V must be maintained or a minimum load of 1mA required. IN OUT ZVS Regulators Rev 2.6 Page 30 of 42 04/2020

PI33xx-x0 PI3305-x0-LGIZ (15.0V ) Electrical Characteristics (Cont.) OUT 100 95 90 85 y c 80 n cie 75 Effi 70 65 60 55 50 0 1 2 3 4 5 6 7 8 Load Curent (A) V = 12V V = 24V V = 36V IN IN IN Figure 49 — Efficiency at 25°C Figure 52 — Transient response 2A to 6A, at 5A/µs Figure 50 — Short circuit test Figure 53 — Output ripple 24V , 15.0V at 8A IN OUT 1.6 1.4 z) 1.2 H M 1.0 y ( nc 0.8 e qu 0.6 e Fr 0.4 0.2 0.0 1 2 3 4 5 6 7 8 Load Curent (A) V = 20.4V V = 24V V = 36V IN IN IN Figure 51 — Switching frequency vs. load current Figure 54 — Output ripple 24V , 15.0V at 4A IN OUT ZVS Regulators Rev 2.6 Page 31 of 42 04/2020

PI33xx-x0 PI3305-x0-LGIZ (15.0V ) Electrical Characteristics (Cont.) OUT 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 21V V = 24V V = 36V IN IN IN Figure 55 — Load current vs. ambient temperature, 0LFM 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 21V V = 24V V = 36V IN IN IN Figure 56 — Load current vs. ambient temperature, 200LFM 9.0 8.0 A) 7.0 nt ( 6.0 re 5.0 r u C 4.0 d a 3.0 o L 2.0 1.0 0.0 50 75 100 125 Ambient Temperature (°C) V = 21V V = 24V V = 36V IN IN IN Figure 57 — Load current vs. ambient temperature, 400LFM ZVS Regulators Rev 2.6 Page 32 of 42 04/2020

PI33xx-x0 Functional Description Switching Frequency Synchronization The SYNCI input allows the user to synchronize the controller The PI33xx-x0 is a family of highly integrated ZVS Buck regulators. switching frequency by an external clock referenced to SGND. The The PI33xx-x0 has a set output voltage that is trimmable within external clock can synchronize the unit between 50% and 110% of a prescribed range shown in Table 1. Performance and maximum the preset switching frequency (f ). For PI33xx-20 device versions output current are characterized with a specific external power S only, the phase delay can be programmed via I2C bus with respect inductor (see Table 4). to the clock applied at SYNCI pin. Phase delay allows PI33xx-20 regulators to be paralleled and operate in an interleaving mode. The PI33xx-x0 default for SYNCI is to sync with respect to the falling edge of the applied clock providing 180° phase shift from SYNCO. This allows for the paralleling of two PI33xx-x0 devices L1 without the need for further user programming or external sync V V VS1 V IN CIN PIGNND PI33xx VOUT COUT OUT cthloec ek xctiercrnuaitlr yc.lo Tchke r iussinegr ceadng ech vaian gthee t hI2eC S dYaNtaC Ib puos la(PrIi3ty3 xtox -s2y0n cd ewviitche REM versions only). SYNCI TRK When using the internal oscillator, the SYNCO pin provides a SYNCO ADJ 5V clock that can be used to sync other regulators. Therefore, EN EAO S one PI33xx-x0 can act as the lead regulator and have additional G ND PI33xx-x0s running in parallel and interleaved. Soft Start The PI33xx-x0 includes an internal soft-start capacitor to ramp the output voltage in 2ms from 0V to full output voltage. Connecting an external capacitor from the TRK pin to SGND will increase the Figure 58 — ZVS Buck with required components start-up ramp period. See, “Soft Start Adjustment and Track,” in the Applications Description section for more details. For basic operation, Figure 58 shows the connections and components required. No additional design or settings Output Voltage Trim are required. The PI33xx-x0 output voltage can be trimmed up from the preset ENABLE (EN) output by connecting a resistor from ADJ pin to SGND and can be trimmed down by connecting a resistor from ADJ pin to V . The EN is the enable pin of the converter. The EN Pin is referenced to OUT Table 1 defines the voltage ranges for the PI33xx-x0 family. SGND and permits the user to turn the regulator on or off. The EN default polarity is a positive logic assertion. If the EN pin is left floating or asserted high, the converter output is enabled. Output Voltage Pulling EN pin below 0.8V with respect to SGND will disable the Device DC Set Range regulator output. PI3311-x0-LGIZ 1.0V 1.0 – 1.4V The EN input polarity can be programmed (PI33xx-20 device versions only) via the I2C™ data bus. When the EN pin polarity is PI3318-x0-LGIZ 1.8V 1.4 – 2.0V programmed for negative logic assertion; and if the EN pin is left PI3312-x0-LGIZ 2.5V 2.0 – 3.1V floating, the regulator output is enabled. Pulling the EN pin above PI3301-x0-LGIZ 3.3V 2.3 – 4.1V 1.0V with respect to SGND, will disable the regulator output. DC PI3302-x0-LGIZ 5.0V 3.3 – 6.5V Remote Sensing PI3303-x0-LGIZ 12V 6.5 – 13.0V An internal 100Ω resistor is connected between REM pin and V OUT PI3305-x0-LGIZ 15V 10.0 – 16.0V pin to provide regulation when the REM connection is broken. Referring to Figure 58, it is important to note that L1 and C Table 1 — PI33xx-x0 family output voltage range OUT are the output filter and the local sense point for the power supply output. As such, the REM pin should be connected at C OUT as the default local-sense connection unless remote sensing to compensate additional distribution losses in the system. The REM pin should not be left floating. ZVS Regulators Rev 2.6 Page 33 of 42 04/2020

PI33xx-x0 Output Current Limit Protection Overtemperature Protection PI33xx-x0 has two methods implemented to protect from output The internal package temperature is monitored to prevent short or over current condition. internal components from reaching their thermal maximum. If the Overtemperature Protection Threshold (OTP) is exceeded (T ), Slow Current Limit protection: prevents the output load from OTP the regulator will complete the current switching cycle, enter a sourcing current higher than the regulator’s maximum rated low-power mode, set a fault flag, and will soft-start when the current. If the output current exceeds the Current Limit (I ) for OUT_CL internal temperature falls below Overtemperature Restart Hysteresis 1024µs, a slow current limit fault is initiated and the regulator is (T ). The OTP fault is stored in a Fault Register and can be shut down which eliminates output current flow. After Fault Restart OTP_HYS read and cleared (PI33xx-20 device versions only) via I2C data bus. Delay (t ), a soft-start cycle is initiated. This restart cycle will be FR_DLY repeated indefinitely until the excessive load is removed. Pulse Skip Mode (PSM) Fast Current Limit protection: PI33xx-x0 monitors the regulator PI33xx-x0 features a PSM to achieve high efficiency at light loads. inductor current pulse-by-pulse to prevent the output from The regulators are set up to skip pulses if EAO falls below a PSM supplying very high current due to sudden low-impedance short threshold. Depending on conditions and component values, this (50A typical). If the regulator senses a high inductor current pulse, may result in single pulses or several consecutive pulses followed it will initiate a fault and stop switching until Fault Restart Delay by skipped pulses. Skipping cycles significantly reduces gate drive ends and then initiate a soft-start cycle. power and improves light load efficiency. The regulator will leave Both the Fast and Slow current limit faults are stored in a Fault PSM once the EAO rises above the Skip Mode threshold. Register and can be read and cleared (PI33xx-20 device versions only) via I2C™ data bus. Variable Frequency Operation Each PI33xx-x0 is preprogrammed to a base operating frequency, Input Undervoltage Lockout with respect to the power stage inductor (see Table 4), to operate If V falls below the input Undervoltage Lockout (UVLO) threshold, at peak efficiency across line and load variations. At low-line IN but remains high enough to power the internal bias supply, the and high-load applications, the base frequency will decrease to PI33xx-x0 will complete the current cycle, stop switching, enter a accommodate these extreme operating ranges. By stretching the low-power state and initiate a fault. The system will restart once frequency, the ZVS operation is preserved throughout the total the input voltage is reestablished and after the Fault Restart Delay. input line voltage range therefore maintaining optimum efficiency. A UVLO fault is stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C data bus. Parallel Operation Paralleling modules can be used to increase the output current Input Overvoltage Lockout capability of a single power rail and reduce output voltage ripple. If V exceeds the input Overvoltage Lockout (OVLO) threshold IN (V ), while the controller is running, the PI33xx-x0 will complete OVLO the current cycle, stop switching, enter a low-power state and L1 set an OVLO fault. The system will resume operation when the VIN VIN VS1 VOUT input voltage falls below 98% of the OVLO threshold and after CIN PGND VOUT COUT the Fault Restart Delay. The OVLO fault is stored in a Fault Register PI33xx and can be read and cleared (PI33xx-20 device versions only) R1 PWRGD (#1) REM SYNCO(#2) SYNCI via I2C data bus. SYNCI(#2) SYNCO EN(#2) EN Output Overvoltage Protection EAO(#2) EAO TRK(#2) TRK SGND The PI33xx-x0 family is equipped with output Overvoltage Protection (OVP) to prevent damage to input voltage-sensitive L1 devices. If the output voltage exceeds 20% of its set regulated vaanldu eis, stuhee arneg OuVlaPt ofra uwltil.l Tchoem spylsetteem th we icllu rrerseunmt cey oclpee, rsattoiopn s wonitcceh ing VIN CIN PVGINND VVOSU1T COUT PI33xx the output voltage falls below the OVP threshold and after Fault PWRGD (#2) REM Restart Delay. The OVP fault is stored in a Fault Register and can be SYNCO(#1) SYNCI read and cleared (PI33xx-20 device versions only) via I2C data bus. SYNCI(#1) SYNCO EN(#1) EN EAO(#1) EAO TRK(#1) TRK SGND Figure 59 — PI33xx-x0 parallel operation ZVS Regulators Rev 2.6 Page 34 of 42 04/2020

PI33xx-x0 The PI33xx-x0 default for SYNCI is to sync with respect to the Application Description falling edge of the applied clock providing 180° phase shift from SYNCO. This allows for the paralleling of two PI33xx-x0 devices Output Voltage Trim without the need for further user programming or external sync clock circuitry. The user can change the SYNCI polarity to sync with The PI33xx-x0 family of Buck Regulators provides seven common the external clock rising edge via the I2C™ data bus (PI33xx-20 output voltages: 1.0, 1.8, 2.5, 3.3, 5.0, 12 and 15V. A post-package device versions only). trim step is implemented to offset any resistor divider network errors ensuring maximum output accuracy. With a single resistor By connecting the EAO pins and SGND pins of each module connected from the ADJ pin to SGND or REM, each device’s together the units will share the current equally. When the TRK output can be varied above or below the nominal set voltage (with pins of each unit are connected together, the units will track each the exception of the PI3311-x0 which can only be above the set other during soft-start and all unit EN pins have to be released to voltage of 1V). allow the units to start (See Figure 59). Also, any fault event in any regulator will disable the other regulators. The two regulators will be out of phase with each other reducing output ripple (refer to Output Voltage Device Switching Frequency Synchronization). Set Range To provide synchronization between regulators over the entire PI3311-x0 1.0V 1.0 – 1.4V operational frequency range, the Power Good (PWRGD) pin must PI3318-x0 1.8V 1.4 – 2.0V be connected to the lead regulator’s (#1) SYNCI pin and a 2.5kΩ Resistor, R1, must be placed between SYNCO (#2) return PI3312-x0 2.5V 2.0 – 3.1V and the lead regulator’s SYNCI (#1) pin, as shown in Figure 59. In PI3301-x0 3.3V 2.3 – 4.1V this configuration, at system soft start, the PWRGD pin pulls SYNCI low forcing the lead regulator to initialize the open-loop start-up PI3302-x0 5.0V 3.3 – 6.5V synchronization. Once the regulators reach regulation, SYNCI is PI3303-x0 12V 6.5 – 13.0V released and the system is now synchronized in a closed-loop PI3305-x0 15V 10.0 – 16.0V configuration which allows the system to adjust, on the fly, when any of the individual regulators begin to enter variable frequency Table 2 — PI33xx-x0 family output voltage range mode in the loop. Multi-phasing three regulators is possible (PI33xx-20 only) with The remote pin (REM) should always be connected to the VOUT no change to the basic single-phase design. For more information pin, if not used, to prevent an output voltage offset. Figure 60 about how to program phase delays within the regulator, please shows the internal feedback voltage divider network. refer to application note PI33xx-2x Multi-Phase Design Guide. I2C™ Interface Operation PI33xx-20 devices provide an I2C digital interface that enables the VOUT user to program the EN pin polarity (from high to low assertion) and switching frequency synchronization phase/delay. These are R4 one time programmable options to the device. REM Also, the PI33xx-20 devices allow for dynamic V margining via OUT I2C that is useful during development (settings stored in volatile R1 RLOW memory only and not retained by the device). The PI33xx-20 also - ADJ have the option for fault telemetry including: + „„Fast/Slow current limit R2 R HIGH „„Output voltage high 1.0VDC SGND „„Input overvoltage „„Input undervoltage „„Overtemperature protection Figure 60 — Internal resistor divider network For more information about how to utilize the I2C interface please refer to Picor application note PI33xx-2x I2C Digital Interface Guide. R1, R2, and R4 are all internal 1.0% resistors and RLOW and RHIGH are external resistors for which the designer can add to modify V to a desired output. The internal resistor value for each OUT regulator is listed below in Table 3. ZVS Regulators Rev 2.6 Page 35 of 42 04/2020

PI33xx-x0 pin, the soft-start time can be increased further. The following Device R1 R2 R4 equation can be used to calculate the proper capacitor for a desired PI3311-x0-LGIZ 1kΩ Open 100Ω soft-start times: PI3318-x0-LGIZ 0.806kΩ 1.0kΩ 100Ω PI3312-x0-LGIZ 1.5kΩ 1.0kΩ 100Ω C = (t • I ) – 100 • 10 –9 (5) TRK TRK TRK PI3301-x0-LGIZ 2.61kΩ 1.13kΩ 100Ω PI3302-x0-LGIZ 4.53kΩ 1.13kΩ 100Ω Where t is the soft-start time and I is a 50µA internal charge TRK TRK current (see Electrical Characteristics for limits). PI3303-x0-LGIZ 11.0kΩ 1.0kΩ 100Ω PI3305-x0-LGIZ 14.0kΩ 1.0kΩ 100Ω There is typically either proportional or direct tracking implemented within a design. For proportional tracking between several Table 3 — PI33xx-x0 internal divider values regulators at start up, simply connect all devices TRK pins together. This type of tracking will force all connected regulators to start up By choosing an output voltage value within the ranges stated in and reach regulation at the same time (see Figure 61(a)). Table 2, V can simply be adjusted up or down by selecting the OUT proper R or R value, respectively. The following equations HIGH LOW can be used to calculate R and R values: V 1 HIGH LOW OUT 1 V 2 R = (1) OUT HIGH ( V – 1) ( 1 ) OUT – R1 R2 (a) 1 Master V R = (2) OUT LOW 1 –( 1 ) VOUT 2 R2( V – 1) R1 OUT If, for example, a 4.0V output is needed, the user should choose (b) the regulator with a trim range covering 4.0V from Table 2. For this t example, the PI3301 is selected (3.3V set voltage). First step would be to use Equation 1 to calculate R since the required output Figure 61 — PI33xx-x0 tracking methods HIGH voltage is higher than the regulator set voltage. The resistor divider network values for the PI3301 are can be found in Table 3 and are For Direct Tracking, choose the regulator with the highest output R1 = 2.61kΩ and R2 = 1.13kΩ. Inserting these values in to voltage as the master and connect the master to the TRK pin of the Equation 1, R is calculated as follows: HIGH other regulators through a divider (Figure 62) with the same ratio as the slave’s feedback divider (see Table 3 for values). 1 3.78kΩ = (3) ( 4.0 – 1) – ( 1 ) 2.61kΩ 1.13kΩ Master V OUT Resistor R should be connected as shown in Figure 60 to HIGH achieve the desired 4.0V regulator output. No external R LOW resistor is need in this design example since the trim is above the PI33xx R1 regulator set voltage. TRK The PI3311-xx output voltage can only be trimmed higher than the factory 1V setting. The following Equation 4 can be used calculate Slave R2 R values for the PI3311-xx regulators. HIGH 1 SGND R = (4) HIGH (1V) ( V – 1) OUT R1 Figure 62 — Voltage divider connections for direct tracking Soft-Start Adjust and Tracking All connected regulators’ soft-start slopes will track with this The TRK pin offers a means to increase the regulator’s soft-start method. Direct tracking timing is demonstrated in Figure 61(b). All time or to track with additional regulators. The soft-start slope tracking regulators should have their Enable (EN) pins connected is controlled by an internal 100nF and a fixed charge current to together to work properly. provide a minimum start-up time of 2ms (typical) for all PI33xx-x0 regulators. By adding an additional external capacitor to the TRK ZVS Regulators Rev 2.6 Page 36 of 42 04/2020

PI33xx-x0 Inductor Pairing Thermal measurements were made using a standard PI33xx-x0 Evaluation board which is 3 x 4 inches in area and uses 4-layer, The PI33xx-x0 utilizes an external inductor. This inductor has been 2oz copper. Thermal measurements were made on the three optimized for maximum efficiency performance. Table 4 details the main power devices, the two internal MOSFETs and the external specific inductor value and part number utilized for each PI33xx-x0 inductor, with air flows of 0, 200 and 400LFM. device which are available from Coiltronics and Eaton. Data sheets are available at: Filter Considerations https://www.eaton.com/ The PI33xx-x0 requires input bulk storage capacitance as well as low-impedance ceramic X5R input capacitors to ensure proper Inductor Inductor start up and high-frequency decoupling for the power stage. The Device Manufacturer PI33xx-x0 will draw nearly all of the high-frequency current from [nH] Part Number the low-impedance ceramic capacitors when the main high-side PI3311-x0 125 FPV1006-125-R Eaton MOSFET is conducting. During the time the high-side MOSFET PI3318-x0 150 FPV1006-150-R Eaton is off, they are replenished from the bulk capacitor. If the input impedance is high at the switching frequency of the converter, PI3312-x0 200 FPT705-200-R Coiltronics the bulk capacitor must supply all of the average current into the PI3301-x0 200 FPT705-200-R Coiltronics converter, including replenishing the ceramic capacitors. This value has been chosen to be 100µF so that the PI33xx-x0 can start up PI3302-x0 200 FPT705-200-R Coiltronics into a full resistive load and supply the output capacitive load with PI3303-x0 230 FPT705-230-R Coiltronics the default minimum soft start capacitor when the input source PI3305-x0 230 FPT705-230-R Coiltronics impedance is 50Ω at 1MHz. The ESR for this capacitor should be approximately 20mΩ. The RMS ripple current in this capacitor is Table 4 — PI33xx-x0 inductor pairing small, so it should not be a concern if the input recommended ceramic capacitors are used. Table 5 shows the recommended input and output capacitors to be used for the various models Thermal De-Rating as well as expected transient response, RMS ripple currents per Thermal de-rating curves are provided that are based on capacitor, and input and output ripple voltages. Table 6 includes component temperature changes versus load current, input voltage the recommended input and output ceramic capacitors. and air flow. It is recommended to use these curves as a guideline for proper thermal de-rating. These curves represent the entire system and are inclusive to both the PI33xx-x0 regulator and the external inductor. Maximum thermal operation is limited by either the MOSFETs or inductor depending upon line and load conditions. C C Load C C C INPUT OUTPUT Input Output Output Recovery V I INPUT INPUT OUTPUT Ripple Ripple Step Device IN LOAD Ceramic Bulk Ceramic Ripple Ripple Ripple Time (V) (A) Current Current (A) X5R Elec. X5R (mV ) (mV ) (mV ) (µs) (I ) (I ) P-P P-P P-P (Slew/µs) RMS RMS 10 8 X 100µF 120 20 4 x 4.7µF 100µF 5 PI3311 24 2 X 1µF 0.5 0.8 ±40 40 5 50V 50V 1 X 0.1µF 100 15 (5A/µs) 10 6 X 100µF 120 20 4 x 4.7µF 100µF 5 PI3318 24 2 X 1µF 0.5 0.8 ±40 40 5 50 50V 1 X 0.1µF 100 15 (5A/µs) 10 4 X 100µF 150 50 100µF 5 PI3312 24 4 x 4.7µF 2 X 1µF 1 1.75 ±80 25 5 50V 1 X 0.1µF 100 24 (10A/µs) 10 4 X 100µF 200 40 100µF 5 PI3301 24 4 x 4.7µF 2 X 1µF 1.05 1.625 ±100 20 5 50V 1 X 0.1µF 125 33 (10A/µs) 10 4 X 47µF 220 50 100µF 5 PI3302 24 4 x 4.7µF 2 X 1µF 1.2 1.5 ±170 30 5 50V 1 X 0.1µF 140 30 (5A/µs) 8 4 X 22µF 275 100 100µF 4 PI3303 24 4 x 4.7µF 2 X 1µF 1.3 1.36 ±300 30 4 50V 1 X 0.1µF 150 60 (10A/µs) 8 4 X 22µF 280 150 100µF 4 PI3305 24 4 x 4.7µF 2 X 1µF 1.38 1.2 ±400 30 4 50V 1 X 0.1µF 160 75 (10A/µs) Table 5 — Recommended input and output capacitance ZVS Regulators Rev 2.6 Page 37 of 42 04/2020

PI33xx-x0 When Q1 is on and Q2 is off, the majority of C current is used Murata Part Number Description IN’s to satisfy the output load and to recharge the C capacitors. OUT GRM188R71C105KA12D 1µF 16V 0603 X7R When Q1 is off and Q2 is on, the load current is supplied by the inductor and the C capacitor as shown in Figure 65. During this GRM319R71H104KA01D 0.1µF 50V 1206 X7R OUT period C is also being recharged by the V . Minimizing C loop IN IN IN GRM31CR60J107ME39L 100µF 6.3V 1206 X5R inductance is important to reduce peak voltage excursions when Q1 turns off. Also, the difference in area between the C loop and GRM31CR71H475KA12K 4.7µF 50V 1206 X7R IN C loop is vital to minimize switching and GND noise. OUT GRM31CR61A476ME15L 47µF 10V 1206 X5R GRM31CR61E226KE15L 22µF 25V 1206 X5R Table 6 — Capacitor manufacturer part numbers Layout Guidelines To optimize maximum efficiency and low-noise performance VIN CIN from a PI33xx-x0 design, layout considerations are necessary. Reducing trace resistance and minimizing high current loop returns along with proper component placement will contribute to optimized performance. C OUT A typical buck converter circuit is shown in Figure 63. The potential areas of high parasitic inductance and resistance are the circuit return paths, shown as LR below. Figure 65 — Current flow: Q2 closed The recommended component placement, shown in Figure 66, illustrates the tight path between C and C (and V and V ) IN OUT IN OUT for the high AC return current. This optimized layout is used on the V C C IN IN OUT PI33xx-x0 evaluation board. V OUT Figure 63 — Typical Buck Converter C OUT The path between the C and C capacitors is of particular GND OUT IN importance since the AC currents are flowing through both of C them when Q1 is turned on. IN VSW Figure 64, schematically, shows the reduced trace length V IN between input and output capacitors. The shorter path lessens the effects that copper trace parasitics can have on the PI33xx-x0 performance. GND Q1 Figure 66 — Recommended component placement and VIN CIN metal routing Q2 C OUT IND Figure 64 — Current flow: Q1 closed ZVS Regulators Rev 2.6 Page 38 of 42 04/2020

PI33xx-x0 Recommended PCB Footprint and Stencil L PI34xx-00 L Recommended receiving footprint for PI33x-x0 10 x 14mm package. All pads should have a final copper size of 0.55 x 0.55mm, whether they are solder-mask defined or copper defined, on a 1 x 1mm grid. All stencil openings are 0.45mm when using either a 5 or 6mil stencil. ZVS Regulators Rev 2.6 Page 39 of 42 04/2020

PI33xx-x0 Package Drawings A K G E D A D E B DETAIL A M A L M M A DETAIL B A M SEATING PLANE METALLIZED PAD SOLDER MASK DETAIL A A L D E AND POSITION ZVS Regulators Rev 2.6 Page 40 of 42 04/2020

PI33xx-x0 Revision History Revision Date Description Page Number(s) 1.5 06/13 Last release in old format n/a 1.6 08/03/15 Reformatted in new template n/a 6, 21, 22, 25, 26, 1.7 08/21/15 Formatting edits 29, 30 & 36 1.8 09/18/15 Formatting edits all Clarifications made in Enable Pin Conditions 7, 18, 22, 26 & 30 1.9 01/06/16 BGA package added 1, 3, 20–23, 34 & 40 2.0 02/22/16 Corrected Input Current spec unit of measure from mA to A 12, 16, 20, 24 & 28 2.1 05/27/16 Revised Output Voltage Total Regulation 12 7, 9, 10, 12, 13, 16, 17, 20, 2.2 08/22/16 Corrected typo in temp range for Electrical Characteristics tables 21, 24, 25, 28 & 29 Clarified VS1 rating in Absolute Maximum Ratings Table 4 2.3 11/21/16 Updated pin description table and package pin-out labels 5 to show VDR capability Block diagram typo corrected, VS1 Spec expanded 4 2.4 02/10/17 PWRGD Pin Description updated 5 Specification conditions clarified 6, 9 Move BGA package to separate data sheet 1, 3, 20-23, 40 2.5 06/01/17 Corrections 1, 6-7, 9-31, 35 2.6 04/03/20 Updated mechanical drawings and pinout format (no mechanical changes) 40 Note: page removed in Revision 2.5. ZVS Regulators Rev 2.6 Page 41 of 42 04/2020

PI33xx-x0 Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom power systems. Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make changes to any products, specifications, and product descriptions at any time without notice. Information published by Vicor has been checked and is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls are used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. Specifications are subject to change without notice. Visit http://www.vicorpower.com/dc-dc-converters-board-mount/cool-power-pi33xx-and-pi34xx for the latest product information. Vicor’s Standard Terms and Conditions and Product Warranty All sales are subject to Vicor’s Standard Terms and Conditions of Sale, and Product Warranty which are available on Vicor’s webpage (http://www.vicorpower.com/termsconditionswarranty) or upon request. Life Support Policy VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages. Intellectual Property Notice Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the products described in this data sheet. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Interested parties should contact Vicor’s Intellectual Property Department. The products described on this data sheet are protected by U.S. Patents. Please see www.vicorpower.com/patents for the latest patent information. Contact Us: http://www.vicorpower.com/contact-us Vicor Corporation 25 Frontage Road Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715 www.vicorpower.com email Customer Service: custserv@vicorpower.com Technical Support: apps@vicorpower.com ©2018 – 2020 Vicor Corporation. All rights reserved. The Vicor name is a registered trademark of Vicor Corporation. I2C™ is a trademark of NXP semiconductor. All other trademarks, product names, logos and brands are property of their respective owners. ZVS Regulators Rev 2.6 Page 42 of 42 04/2020

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: V icor: PI3303-20-LGIZ PI3312-20-LGIZ PI3302-00-LGIZ PI3305-20-LGIZ PI3318-00-LGIZ PI3311-00-LGIZ PI3311-20- LGIZ PI3318-20-LGIZ PI3305-00-LGIZ PI3312-00-LGIZ PI3302-20-LGIZ PI3301-00-LGIZ PI3303-00-LGIZ PI3301- 20-LGIZ