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F P F 2 1 November 2008 4 0 / FPF2140/42/43/44/46/47 4 2 tm /4 Full Function Load Switch with Reverse Current Blocking 3 / 4 4 / Features General Description 4 6 / 4 (cid:132) 1.8 to 5.5V Input Voltage Range The FPF2140/42/43/44/46/47 is a series of load switches which 7 (cid:132) Controlled Turn-On provides full protection to systems and loads which may F (cid:132) 200mA and 400mA Current Limit Options encounter large current conditions. These devices contain a u 0.12Ω current-limited P-channel MOSFET which can operate l (cid:132) Undervoltage Lockout l over an input voltage range of 1.8-5.5V. Internally, current is F (cid:132) Thermal Shutdown prevented from flowing when the MOSFET is off and the output u n (cid:132) <2µA Shutdown Current voltage is higher than the input voltage. Switch control is by a c (cid:132) Auto Restart logic input (ON) capable of interfacing directly with low voltage ti o control signals. Each part contains thermal shutdown protection (cid:132) Fast Current limit Response Time n which shuts off the switch to prevent damage to the part when a (cid:132) 5µs to Moderate Over Currents L continuous over-current condition causes excessive heating. o (cid:132) 30ns to Hard Shorts a When the switch current reaches the current limit, the part d (cid:132) Fault Blanking operates in a constant-current mode to prohibit excessive S (cid:132) Reverse Current Blocking currents from causing damage. For the FPF2140/42/44/46, if w (cid:132) Power Good Function the constant current condition still persists after 30ms, the part it c (cid:132) RoHS Compliant will shut off the switch and pull the fault signal pin (FLAGB) low. h The FPF2140/44 have an auto-restart feature which will turn the w Applications switch on again after 450ms if the ON pin is still active. The i t FPF2142/46 do not have this auto-restart feature so the switch h (cid:132) PDAs will remain off until the ON pin is cycled. For the FPF2143/47, a R (cid:132) Cell Phones current limit condition will immediately pull the fault signal pin e v (cid:132) GPS Devices low and the part will remain in the constant-current mode until e the switch current falls below the current limit. The minimum r (cid:132) MP3 Players s current limit is 200mA for the FPF2140/42/43 while that for the e (cid:132) Digital Cameras FPF2144/46/47 is 400mA. C (cid:132) Peripheral Ports u These parts are available in a space-saving 6 pin 2X2 MLP r (cid:132) Hot Swap Supplies r package. e n t B l o c k i n g Pin 1 BOTTOM TOP Ordering Information Current Limit Auto-Restart Current Limit ON Pin Part Blanking Time Time [mA] Activity [ms] [ms] FPF2140 200/300/400 15/30/60 225/450/900 Active HI FPF2142 200/300/400 15/30/60 NA Active HI FPF2143 200/300/400 0 NA Active HI FPF2144 400/600/800 15/30/60 225/450/900 Active HI FPF2146 400/600/800 15/30/60 NA Active HI FPF2147 400/600/800 0 NA Active HI ©2008 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Typical Application Circuit F 2 1 4 0 / TO LOAD 4 2 V V IN OUT / 4 FPF2140/2/3/4/6/7 3 / 4 PGOOD FLAGB 4 / OFF ON ON 4 6 GND /4 7 F u l l F u n c t i Functional Block Diagram o n L o a VIN d S w i t UVLO c h w i REVERSE t ON CONTROL CURRENT h LOGIC R BLOCKING e v THERMAL e SHUTDOWN CURRENT rs e LIMIT VOUT C u r FLAGB r e PGOOD n t B l o c k i n g GND 2 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Pin Configuration F 2 1 4 0 / ON 6 1 PGOOD 4 2 / 4 GND 5 7 2 VIN 3/4 4 / FLAGB 4 3 V 4 OUT 6 / 4 2X2 MicroFET-6 7 F u Pin Description l l F Pin Name Function u n Power Good output: Open drain output which indicate that output voltage has reached c 1 PGOOD 90% of input voltage tio n 2 VIN Supply Input: Input to the power switch and the supply voltage For the IC L 3 V Switch Output: Output of the power switch o OUT a Fault Output: Active LO, open drain output which indicates an over current supply under d 4 FLAGB voltage or over temperature state. S w 5, 7 GND Ground i t c 6 ON ON Control Input h w Absolute Maximum Ratings it h R Parameter Min Max Unit e v VIN, VOUT, ON, FLAGB, PGOOD to GND -0.3 6 V e r Power Dissipation 1.2 W s e Operating and Storage Junction Temperature -65 150 °C C Thermal Resistance, Junction to Ambient 86 °C/W u r r Jedec A114A HBM 4000 V e n Jedec C101C CDM 2000 V t B Electrostatic Discharge Protection Jedec A115 MM 400 V l o Air Discharge 15000 V c IEC 61000-4-2 k Contact Discharge 8000 V in g Recommended Operating Range Parameter Min Max Unit V 1.8 5.5 V IN Ambient Operating Temperature, T -40 85 °C A Electrical Characteristics V = 1.8 to 5.5V, T = -40 to +85°C unless otherwise noted. Typical values are at V = 3.3V and T = 25°C. IN A IN A Parameter Symbol Conditions Min Typ Max Units Basic Operation Operating Voltage V 1.8 5.5 V IN V = 1.8V 40 70 100 IN Quiescent Current I I = 0mA V = 3.3V 75 µA Q OUT IN V = 5.5V 85 120 IN 3 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P F Electrical Characteristics Cont. 2 1 V = 1.8 to 5.5V, T = -40 to +85°C unless otherwise noted. Typical values are at V = 3.3V and T = 25°C. 4 IN A IN A 0 Parameter Symbol Conditions Min Typ Max Units / 4 2 VIN = 3.3V, IOUT = 200mA, TA = 25°C 120 160 /4 3 On-Resistance RON VIN = 3.3V, IOUT = 200mA, TA = 85°C 135 180 mΩ / 4 V = 3.3V, I = 200mA, T = -40°C to +85°C 65 180 4 IN OUT A / 4 ON Input Logic High Voltage VIN = 1.8V 0.8 6 (ON) VIH V = 5.5V 1.4 V /4 IN 7 VIN = 1.8V 0.5 F ON Input Logic Low Voltage V V IL u V = 5.5V 1 IN l l ON Input Leakage VON = VIN or GND -1 1 µA F u V Shutdown Current VON = 0V, VIN = 5.5V, -2 2 µA n IN V = short to GND c OUT t i FLAGB Output Logic Low VIN = 5V, ISINK = 10mA 0.05 0.2 V on Voltage VIN = 1.8V, ISINK = 10mA 0.12 0.3 L o FLAGB Output High Leakage V = V = 5V 1 µA a Current IN ON d S PGOOD Threshold Voltage V = 5.5V 90 % IN w PGOOD Threshold Voltage i 1 % tc Hysteresis h PGOOD Output Logic Low VIN = 5V, ISINK = 10mA 0.05 0.1 V w Voltage VIN = 1.8V, ISINK = 10mA 0.12 0.2 V ith PGOOD Output High Leakage R V = V = 5V 1 µA Current IN ON e v Reverse Block e r s V Shutdown Current VON = 0V, VOUT = 5.5V, -2 2 µA e OUT VIN = short to GND C u Protections r r FPF2140, FPF2142, e 200 300 400 n Current Limit I VIN = 3.3V, FPF2143 mA t LIM VOUT = 3.0V FPF2144, FPF2146, B 400 600 800 l FPF2147 o c Shutdown Threshold T increasing 140 k J i n Thermal Shutdown Return from Shutdown 130 °C g Hysteresis 10 Under Voltage Lockout V V Increasing 1.55 1.65 1.75 V UVLO IN Under Voltage Lockout 50 mV Hysteresis Dynamic Delay On Time td R = 500Ω, C = 0.1µF 25 µs ON L L Delay Off Time td R = 500Ω, C = 0.1µF 45 µs OFF L L V Rise Time t R = 500Ω, C = 0.1µF 10 µs OUT R L L V Fall Time t R = 500Ω, C = 0.1µF 110 µs OUT F L L Over Current Blanking Time t FPF2140, FPF2142, FPF2144, FPF2146 15 30 60 ms BLANK Auto-Restart Time t FPF2140, FPF2144 225 450 900 ms RSTRT V = V = 3.3V. Moderate IN ON 5 µs Short Circuit Response Time Over-Current Condition V = V = 3.3V. Hard Short 30 ns IN ON Note 1: Package power dissipation on 1 square inch pad, 2 oz. copper board. 4 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Typical Characteristics F 2 1 4 90 110 0 105 /4 85 100 2 NT (uA) 80 NT (uA) 9905 /43/4 RE RE 85 VIN = 5.5V 4 SUPPLY CUR 7705 SUPPLY CUR 67785050 VIN = 3.3VVIN = 1.8V /46/47 65 60 F u 55 l 60 50 l F 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 -40 -15 10 35 60 85 u SUPPLY VOLTAGE (V) T, JUNCTION TEMPERATURE (°C) n J c t i o Figure 1. Quiescent Current vs. Input Voltage Figure 2. Quiescent Current vs. Temperature n L o a d S 1.3 1.2 w i 1.2 1.1 tc V) V) h GE ( 1.1 GE ( 1 w OLTA 1 OLTA 0.9 ith H V 0.9 W V 0.8 R V HIGON 0.8 V LOON0.7 eve 0.7 0.6 rs e 0.6 0.5 C 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 u SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) r r e n t Figure 3. VON High Voltage vs. Input Voltage Figure 4. VON Low Voltage vs. Input Voltage B l o c k i n 200 240 g 190 220 180 200 170 hms)115600 hms)116800 VIN = 1.8V O O m140 m (N130 (N140 RO120 RO120 VIN = 3.3V 110 100 100 90 80 VIN = 5.5V 80 60 1 2 3 4 5 6 -40 -15 10 35 60 85 V, SUPPLY VOLTAGE (V) T, JUNCTION TEMPERATURE (°C) IN J Figure 5. R vs. V Figure 6. R vs. Temperature ON IN ON 5 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Typical Characteristics F 2 1 4 350 700 0 FPF2140 / 42 / 43 FPF2144 / 46 / 47 /4 300 VIN = 5.5V 600 VIN = 5.5V 2 / RRENT (mA)220500 RRENT (mA)450000 43/44/4 UT CU150 UT CU300 6/4 OUTP100 OUTP200 7 F 50 100 u l l 0 0 F 0 1 2 3 4 5 6 0 1 2 3 4 5 6 u n V - V (V) V - V (V) IN OUT IN OUT c t i o Figure 7. Current Limit vs. Output Voltage Figure 8. Current Limit vs. Output Voltage n L o a d 320 635 S FPF2140 / 42 / 43 630 FPF2144 / 46 / 47 w i 315 625 tc CURRENT LIMIT (mA)333001050 CURRENT LIMIT (mA)556666699001120505050 h with Reve 295 r 585 s 580 e 290 575 C -65 -40 -15 10 35 60 85 110 135 -65 -40 -15 10 35 60 85 110 135 u TJ, JUNCTION TEMPERATURE (°C) TJ, JUNCTION TEMPERATURE (°C) rre n t Figure 9. Current Limit vs. Temperature Figure 10. Current Limit vs. Temperature B l o c k i n 100 1000 g VIN = 3.3 V VIN = 3.3 V RL = 500 Ohms RL= 500 Ohms ME (uS) COUT = 0.1uF tdOFF ES (uS)100 TF TI M N/OFF ALL TI ELAY O tdON RISE / F 10 TR D 10 1 -40 -15 10 35 60 85 -40 -15 10 35 60 85 T, JUNCTION TEMPERATURE (°C) T, JUNCTION TEMPERATURE (°C) J J Figure 11. td / td vs. Temperature Figure 12. T / T vs. Temperature ON OFF RISE FALL 6 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Typical Characteristics F 2 1 4 33 500 0 / 495 4 32.5 2 490 /4 E (mS)313.52 ME (mS)448805 3/44 ANK TIM 31 TART TI447705 /46/4 BL30.5 RES465 7 460 F 30 u 455 l l 29.5 450 F -40 -15 10 35 60 85 -40 -15 10 35 60 85 u n T, JUNCTION TEMPERATURE (°C) T, JUNCTION TEMPERATURE (°C) J J c t i o Figure 13. T vs. Temperature Figure 14. T vs. Temperature BLANK RESTART n L o a d S CIN = 10µF w C = 0.1µF i OUT t VON CIN = 10µF VON RL = 500Ω ch 2V/DIV COUT = 0.1µF 2V/DIV VIN = 3.3V w R = 500Ω L i t VIN = 3.3V h I I R OUT OUT 10mA/DIV 10mA/DIV e v e VOUT rs 2V/DIV e C u r 100µs/DIV 500ns/DIV re n t Figure 15. tdON Response Figure 16. tdOFF Response B l o c k i n g VIN VIN = VON 2V/DIV 2V/DIV C = 10µF IN V = 3.3V IN IOUT IOUT 5A/DIV 500mA/DIV VOUT CIN = 10µF 2V/DIV V = V = 3.3V IN ON V = GND OUT 20µs/DIV 50µs/DIV Figure 17. Short Circuit Response Time Figure 18. Current Limit Response Time (Output shorted to GND) (Switch is powered into a short) 7 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Typical Characteristics F 2 1 4 0 VIN VIN /4 2V/DIV 2V/DIV 2 / 4 3 / VON VON 44 2V/DIV 2V/DIV / 4 6 500ImOUAT/D IV CCVIIONNU ==T 31=.0 30µV.F1µF 500ImOUAT/D IV CCVIONU ==T 31=.0 31µV0FµF /47 F VOUT VOUT IN u 2V/DIV 2V/DIV ll F u n 50µs/DIV 50µs/DIV c t i o Figure 19. Current Limit Response Time Figure 20. Current Limit Response Time n (Output is loaded by 2.2Ω, COUT = 0.1µF) (Output is loaded by 2.2Ω, COUT = 10µF) L o a d FPF2140/42/44/46 S VDRV2 w VIN CIN = 10µF 2V/DIV it 5V/DIV C = 0.1µF c OUT h RL = 500Ω VON TBLANK w VON VIN = 5.5V 2V/DIV it 5V/DIV h IOUT R 500mA/DIV e VOUT CIN = 10µF ve 5V/DIV C = 0.1µF r OUT s VOUT RL = 500Ω e PGOOD 2V/DIV VIN = 3.3V C 5V/DIV u 20ms/DIV rr 10µs/DIV e n t Figure 21. PGOOD Response Figure 22. TBLANK Response B l o c k i n g V 2 FPF2140/44 DRV 2V/DIV T RESTART V ON 2V/DIV I OUT 500mA/DIV C = 10µF IN C = 0.1µF OUT VOUT RL = 500Ω 2V/DIV VIN = 3.3V 100ms/DIV Figure 23. T Response RESTART Note 2: V signal forces the device to go into overcurrent condition by loading. DRV 8 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Description of Operation For preventing the switch from large power dissipation during F 2 heavy load a short circuit detection feature is introduced. Short 1 The FPF2140/42/43/44/46/47 are current limited switches that circuit condition is detected by observing the output voltage. 4 protect systems and loads which can be damaged or disrupted The switch is put into short circuit current limiting mode if the 0 / by the application of high currents. The core of each device is a switch is loaded with a heavy load. When the output voltage 4 2 0.12Ω P-channel MOSFET and a controller capable of drops below VSCTH, short circuit detection threshold voltage, / 4 functioning over a wide input operating range of 1.8-5.5V. The the current limit value re-conditioned and short circuit current 3 controller protects against system malfunctions through current limit value is decreased to 62.5% of the current limit value. This /4 limiting, undervoltage lockout and thermal shutdown. The keeps the power dissipation of the part below a certain limit 4 / current limit is preset for either 200mA or 400mA. even at dead short conditions at 5.5V input voltage. The VSCTH 4 6 value is set to be 1V. At around 1.1V of output voltage the / 4 On/Off Control switch is removed from short circuit current limiting mode and 7 the current limit is set to the current limit value. F The ON pin controls the state of the switch. Activating ON u continuously holds the switch in the on state so long as there is l l no undervoltage on VIN or a junction temperature in excess of Undervoltage Lockout F 140°C. ON is active HI and has a low threshold making it The undervoltage lockout turns-off the switch if the input u n capable of interfacing with low voltage signals. In addition, voltage drops below the undervoltage lockout threshold. With c excessive currents will cause the switch to turn off for FPF2140/ the ON pin active the input voltage rising above the t i o 42 and FPF2144/46. The FPF2140/44 have an Auto-Restart undervoltage lockout threshold will cause a controlled turn-on of n feature which will automatically turn the switch on again after the switch which limits current over-shoots. L 450ms. For the FPF2142/46, the ON pin must be toggled to o turn-on the switch again. With no auto-restart, the FPF2143/47 a Reverse Current Blocking d do not turn off in response to a over current condition but instead remain operating in a constant current mode so long as The entire FPF2140/47 family has a Reverse Current Blocking S ON is active and the thermal shutdown or undervoltage lockout feature that protects input source against current flow from w have not activated. output to input. For a standard USB power design, this is an itc important feature which protects the USB host from being h The ON pin control voltage and VIN pin have independent damaged due to reverse current flow on VBUS. The reverse w recommended operating ranges. The ON pin voltage can be current blocking feature is active when the load switch is turned i t driven by a voltage level higher than the input voltage. off. h R If ON pin is LO and output voltage become greater than input e Fault Reporting voltage, no current can flow from the output to the input . The v e Upon the detection of an over-current, an input undervoltage, or FLAGB operation is independent of the Reverse Current r an over-temperature condition, the FLAGB signals the fault blocking feature and will not report a fault condition if this s e mode by activating LO. For the FPF2140/42/44/46, the FLAGB feature is activated. C goes LO at the end of the blanking time while FLAGB goes LO u immediately for the FPF2143/47. FLAGB remains LO through r the Auto-Restart Time for the FPF2140/44. For the FPF2142/ Thermal Shutdown re 46, FLAGB is latched LO and ON must be toggled to release it. The thermal shutdown protects the die from internally or n t With the FPF2143/47, FLAGB is LO during the faults and externally generated excessive temperatures. During an B immediately returns HI at the end of the fault condition. FLAGB over-temperature condition the FLAGB is activated and the lo is an open-drain MOSFET which requires a pull-up resistor switch is turned-off. The switch automatically turns-on again if c between V and FLAGB. During shutdown, the pull-down on temperature of the die drops below the threshold temperature. k IN i n FLAGB is disabled to reduce current draw from the supply. g Timing Diagram Current Limiting 90% The current limit guarantees that the current through the switch V doesn't exceed a maximum value while not limiting at less than ON 10% a minimum value. For the FPF2140/42/43 the minimum current is 200mA and the maximum current is 400mA and for the FPF2144/46/47 the minimum current is 400mA and the 90% 90% maximum current is 800mA. The FPF2140/42/44/46 have a V OUT 10% 10% blanking time of 30ms, nominally, during which the switch will act as a constant current source. At the end of the blanking time, the switch will be turned-off and the FLAGB pin will tdON tR tdOFF tF activate to indicate that current limiting has occurred. The tON tOFF FPF2143/47 have no current limit blanking period so where: immediately upon a current limit condition FLAGB is activated. tdON = Delay On Time t = V Rise Time These parts will remain in a constant current state until the ON R OUT t = Turn On Time pin is deactivated or the thermal shutdown turns-off the switch. ON td = Delay Off Time OFF t = V Fall Time F OUT t = Turn Off Time OFF 9 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Application Information F 2 1 Typical Application 4 0 / 4 2 / 4 3 VIN VOUT LOAD /4 4 Typical value = 100KΩ FPF2140/2/3/4/6/7 R1 = 100KΩ /4 Battery 6 1.8V-5.5V PGOOD FLAGB R2 = 499Ω /4 OFF ON ON 7 GND C2 = 0.1µF F C1 = 4.7µF u l l F u n c t i o Input Capacitor n To limit the voltage drop on the input supply caused by transient When using the FPF2142/46 attention must be given to the L in-rush currents when the switch turns-on into a discharged load manual resetting of the part. The junction temperature will only o a capacitor or a short-circuit, a capacitor needs to be placed be allowed to increase to the thermal shutdown threshold. Once d between VIN and GND. A 4.7µF ceramic capacitor, CIN, must be this temperature has been reached, toggling ON will not turn-on S placed close to the VIN pin. A higher value of CIN can be used to the switch until the junction temperature drops. For the w further reduce the voltage drop experienced as the switch is FPF2140/44, a short on the output will cause the part to operate it c turned on into a large capacitive load. in a constant current state dissipating a worst case power as h calculated in (3) until the thermal shutdown activates. It will then w cycle in and out of thermal shutdown so long as the ON pin is i Output Capacitor t active and the short is present. h A 0.1uF capacitor C , should be placed between V and OUT OUT R GND. This capacitor will prevent parasitic board inductances e from forcing VOUT below GND when the switch turns-off. For the Board Layout ve FPF2140/42/44/46, the total output capacitance needs to be r For best performance, all traces should be as short as possible. s kept below a maximum value, C (max), to prevent the part OUT To be most effective, the input and output capacitors should be e from registering an over-current condition and turning-off the placed close to the device to minimize the effects that parasitic C switch. The maximum output capacitance can be determined u trace inductances may have on normal and short-circuit from the following formula, r operation. Using wide traces for V , V and GND will help r (1) IN OUT e COUT(max) = ILIM(max) xV ItNBLANK(min) mcainseim tioz ea mpbaireansti ttihc eermleactl riimcapl eedfafencctes. along with minimizing the nt B The middle pad (pin 7) should be connected to the GND plate lo of PCB for improving thermal performance of the load switch. c k Power Dissipation An improper layout could result higher junction temperature and in triggering the thermal shutdown protection feature. This concern During normal operation as a switch, the power dissipation is g applies specially with FPF2143 and FPF2147 where load switch small and has little effect on the operating temperature of the turns on into an overcurrent condition and switch supplies part. The parts with the higher current limits will dissipate the constant current limit value. In this case power dissipation of the most power and that will only be, (2) switch (P = (V - V ) x I (max)) could exceed the P = (ILIM)2 x RDS = (0.8)2 x 0.12 = 76.8mW maximum DabsoluteIN poweOr UdTissipatLioIMn of 1.2W. If the part goes into current limit the maximum power dissipation will occur when the output is shorted to ground. For the FPF2140/44, the power dissipation will scale by the Auto-Restart Time, t , and the Over Current Blanking Time, RSTRT t , so that the maximum power dissipated is, BLANK t P(max) = BLANK x V (max) x I (max) t + t IN LIM BLANK RSTRT 30 = x 5.5 x 0.8 = 275mW (3) 30 + 450 10 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

F P Application Notes F 2 1 Startup Power Sequence 4 0 / 4 2 To Load / VIN1 FPF2140/2/ VOUT1 43 3/4/6/7 / 4 V PGOOD 4 IN1 FLAGB /4 OFF ON ON GND 6/ 4 7 100KΩ F u l l F To Load u VIN2 FPF2140/2/ VOUT2 nc 3/4/6/7 t i PGOOD o VIN2 n FLAGB ON GND Lo a d 100KΩ S TP w i t c Power good function in sequential startup. No battery is loaded to the output h w i Power Good Sequential Startup using Power Good t h R FPF214X family has a "Power Good" feature. PGOOD pin is an The power good pin can be connected to another load switch's e open-drain MOSFET which asserts high when the output enable pin to implement sequential startup. PGOOD pin asserts v voltage reaches 90% of the input voltage. low when the load switch is OFF. This feature allows driving a e r subsequent circuit. The above diagram illustrates power good s PGOOD pin requires an external pull up resistor that is e connected to the output voltage when there is no battery in the function in sequential startup. As the VOUT1 of the first load C switch starts to ramp to the 90% of its input voltage the second load side and the logic level of the subsequent controller u permits. This would give logic levels similar to a CMOS output switch remains in OFF state. Whereas the VOUT1 passes the rr 90% threshold, power good signal becomes active and asserts e stage for PGOOD, while still keeping the option to tie the pull-up high. This signal will turn on the second load switch and V n to a different supply voltage. A typical value of 100KΩ is OUT2 t recommended to be used as pull up resistor. The PGOOD pin will start to increase. The total startup time may vary according B to the difference between supply voltages that are used in the l status is independent of the ON pin position. This mean that o application. c PGOOD pin stays low when the load switch is OFF. If the Power k Good feature is not used in the application the pin can be i n connected directly to GND. g 11 www.fairchildsemi.com FPF2140/42/43/44/46/47 Rev. I

0.05 C 2.0 A 1.72 1.68 2X B 6 4 0.15 2.0 0.90 1.21 2.25 0.52(6X) 0.05 C PIN1IDENT 1 3 TOPVIEW 2X 0.65 0.42(6X) RECOMMENDED LANDPATTERN (cid:19)(cid:17)(cid:26)(cid:24)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) 0.10 C (cid:19)(cid:17)(cid:21)(cid:19)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) NOTES: 0.08 C SIDEVIEW C (cid:19)(cid:17)(cid:19)(cid:21)(cid:24)(cid:147)(cid:19)(cid:17)(cid:19)(cid:21)(cid:24) A.PACKAGEDOESNOTFULLYCONFORM SEATING TOJEDECMO-229REGISTRATION PLANE B.DIMENSIONSAREINMILLIMETERS. C.DIMENSIONSANDTOLERANCESPER (cid:21)(cid:17)(cid:19)(cid:19)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) ASMEY14.5M,2009. (cid:20)(cid:17)(cid:23)(cid:19)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) D.LANDPATTERNRECOMMENDATIONIS (0.70) EXISTINGINDUSTRYLANDPATTERN. PIN1IDENT (0.20)4X E.DRAWINGFILENAME:MKT-MLP06Krev5. 1 3 (cid:19)(cid:17)(cid:22)(cid:21)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) (0.40) (6X) (cid:19)(cid:17)(cid:27)(cid:19)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24) (0.60) 6 4 (cid:19)(cid:17)(cid:22)(cid:19)(cid:147)(cid:19)(cid:17)(cid:19)(cid:24)(6X) 0.65 0.10 C A B 1.30 0.05 C BOTTOMVIEW

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