NOT RECOMMENDED FOR NEW DESIGN USE AP7343 AP131 300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN Description Pin Assignments The AP131 is a 300mA, fixed output voltage, low dropout linear regulator. The Device included pass element, error amplifier, band- ( Top View ) gap, current limit and thermal shutdown circuitry. The device is ON when the EN pin is set to logic high level. IN 1 5 OUT The characteristics of low dropout voltage and less quiescent current make it good for some critical current applications, for example, some battery powered devices. The typical quiescent current is GND 2 approximately 50µA from zero to maximum load. Due to the internal flexible design, it results in extensively fixed output voltage versions EN 3 4 BP and makes it convenient to use for applications. Built-in current-limit and thermal-shutdown functions prevent any fault condition from IC damage. An external capacitor can be connected to the BP pin and SOT25 reduce the output noise. Features Applications • Input Voltage Range is from 2.7V to 5.5V • Battery Powered Device • Dropout Voltage 400mV at 300mA Output Current • Wireless Communication • Guaranteed 300mA Output Current • CD-ROM, DVD, and LAN Card • Internal Ron = 1.5Ω PMOS Draws no Base Current • PC Peripheral • Low Quiescent Current 50µA • Output Voltage: 1.5V/1.8V/2.0V/2.5V/2.8V/ • 2.9V/3.0V/3.3V/ 3.5V; Accuracy 2% • Active Low Shutdown Function (EN pin) • Fast Transient Response • Good Load Regulation • Current Limit and Thermal Shutdown Protection • Short-Circuit Current Fold-Back • Lead Free package: SOT25 • SOT25: Available in “Green” Molding Compound (No Br, Sb) • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) • Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Typical Applications Circuit ON EN AP131 OFF EN IN VOUT OUT V IN GND BP C IN C 1uF OUT C 10uF BP 0.1uF AP131 1 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

AP131 Pin Descriptions Pin Name Description IN Input Voltage GND Ground EN Enable Pin BP Band-Gap OUT Output Voltage Functional Block Diagram IN OUT Error Current Amp Limit - + EN Enable Bandgap 1.08V Thermal Shutdown GND BP Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) Symbol Parameter Rating Unit VCC Input Voltage +6 V TOP Operating Junction Temperature Range -40 to +125 °C TST Storage Temperature Range -65 to +150 °C PD Power Dissipation, PD @ TA = 25°C SOT25 250 mW Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit VIN Input Voltage 2.7 5.5 V IOUT Output Current 0 300 mA TA Operating Ambient Temperature -40 85 °C AP131 2 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

AP131 Electrical Characteristics (@TA = +25°C, unless otherwise specified.) TA = 25ºC, CIN = 1µF, COUT = 10µF, unless otherwise specified. Symbol Parameter Conditions Min Typ. Max Unit VDROP Dropout Voltage (Note 4) IL = 300mA — 400 500 mV ILIMIT Current Limit (Note 5) VIN = 5V, VOUT = 0V 350 450 — mA Ishort Short Circuit Current VOUT < 1.05V — 150 300 mA ΔVLINE Line Regulation IVOIUNT = =( V1OmUAT ,+ 1V ) to 5.5V — 0.1 0.3 %/V ΔVLOAD Load Regulation (Note 6) IL = 1~300mA, VIN = 5V — 30 35 mV Output Voltage Accuracy IL = 1mA, VIN = 5V -2 — +2 % ΔVOUT Output Voltage Temperature Coefficient (Note 7) — — 50 150 PPM/°C F = 100Hz, PSRR Ripple Rejection CIN = 1μF, CO = 10µF, — 60 — dB IL = 100mA ISB Standby Current IL = 0mA, VIN = 5V, EN = 0V — — 5 μA IQ Quiescent Current IL = 0mA, VIN = 5V, EN = 5V — 50 100 μA IEN Enable Pin Current — — — < 0.1 μA VENON Output ON 1.5 — VIN V Enable Pin Voltage VENOFF Output OFF 0 — 0.8 V CBP = 0.1μF, COUT = 1μF, TDELAY Enable Delay Time — 8 — µS IOUT = 30mA Thermal Resistance ϴJA SOT25 (Note 8) — 163 — °C/W Junction-to-Ambient Thermal Resistance ϴJC SOT25 (Note 8) — 53 — °C/W Junction-to-Case Notes: 4. Dropout voltage is defined as the input to output differential voltage. Dropout is measured at constant junction temperature by using pulsed ON time, and the criterion is VOUT inside target value ±2%. This test is skipped at the condition of VIN<3V. 5. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time. 6. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time. 7. Guaranteed by design. 8. Test conditions for SOT25: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout. AP131 3 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

AP131 Typical Characteristics 70 AP131 PSRR vs. Frequency AP131 Vout vs. Load Current 3.095 65 3.09 60 3.085 55 3.08 50 3.075 B) 45 3.07 (d 40 ut3.065 R 35 Vo3.06 R 3.055 S 30 3.05 P 25 3.045 20 3.04 15 3.035 10 3.03 5 3.025 0 3.02 0 30 60 90 120 150 180 210 240 270 300 330 10 100 1K 10K 100K 1M Load Current (uA) Frequency (Hz) AP131 GND Current vs. Input Voltage AP131 Dropout vs. Load 55 450 50 VOUT=3.3V 400 45 A)40 350 u Current (233505 opout (V) 223050000 D 20 Dr 150 N15 G10 100 5 50 0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0 50 100 150 200 250 300 Input Voltage (V) Load (Io) (mA) AP131 4 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

AP131 Ordering Information AP131 - XX W X - 7 Output Voltage Package Lead Free Packing 15 :1.5V W : SOT25 L : Lead Free 7 : T a pe & Reel 18 :1.8V G : Green 20 :2.0V 25 :2.5V 28 :2.8V 29 :2.9V 30 :3.0V 33 :3.3V 35 :3.5V Packaging 7” Tape and Reel Device Package Code (Note 2) Quantity Part Number Suffix AP131-XXWL-7 W SOT25 3000/Tape & Reel -7 Lead-free AP131-XXWG-7 W SOT25 3000/Tape & Reel -7 Marking Information (1) SOT25 ( Top View ) 5 4 7 XX : Identification code Y : Year 0~9 XX Y W X W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week 1 2 3 X : a~z : Lead Free A~Z : Green Part Number Package Identification Code AP131-15W SOT25 DA AP131-18W SOT25 DD AP131-20W SOT25 DF AP131-25W SOT25 DK AP131-28W SOT25 DN AP131-29W SOT25 DO AP131-30W SOT25 DP AP131-33W SOT25 DS AP131-35W SOT25 DU AP131 5 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

AP131 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. SOT25 A SOT25 Dim Min Max Typ B C A 0.35 0.50 0.38 B 1.50 1.70 1.60 C 2.70 3.00 2.80 D - - 0.95 H 2.90 3.10 3.00 H J 0.013 0.10 0.05 K 1.00 1.30 1.10 K N M L 0.35 0.55 0.40 M 0.10 0.20 0.15 J N 0.70 0.80 0.75 D L α 0° 8° - All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. SOT25 C2 C2 Dimensions Value Z 3.20 G C1 Z G 1.60 X 0.55 Y 0.80 Y C1 2.40 X C2 0.95 AP131 6 of 7 February 2019 Document number: DS31046 Rev. 8 - 3 www.diodes.com © Diodes Incorporated

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