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AP7331-33WG-7

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Diodes Incorporated Linear Voltage Regulators (LDO), SOT-25. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AP7331-33WG-7

Diodes Incorporated · Linear Voltage Regulators (LDO) · SOT-25

AP7331-33WG-7 from Diodes Incorporated, in a SOT-25. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IN power_in Voltage input pin, to be bypassed to ground through at least a 1µF capacitor.
2 GND power_in Ground pin.
3 EN input Enable input, active high; the regulator turns on when EN is set to logic high.
4 NC unconnected No connection on the SOT25 fixed-output package.
5 OUT power_out Voltage output pin, to be bypassed to ground through a 1µF ceramic capacitor.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-25
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage VIN 7 V 3
Operating Junction Temperature Range TOP -40 125 °C 3
Storage Temperature Range TST -65 150 °C 3
Maximum Junction Temperature TJ 150 °C 3
Power Dissipation SOT25 PD 640 mW SOT25; ratings apply to ambient temperature at 25°C (Note 2) 3
ESD HBM Human Body Model ESD Protection ESD HBM 6 kV 3
ESD MM Machine Model ESD Protection ESD MM 400 V 3
Input voltage VIN 2 6 V 3
Output Current IOUT 0 300 mA Note 3 3
Operating Ambient Temperature TA -40 85 °C 3
Input Quiescent Current IQ 55 75 μA VEN = VIN, IOUT = 0mA 4
Input Quiescent Current IQ 65 85 μA VEN = VIN, IOUT = 300mA 4
Input Shutdown Current ISHDN 1 μA VEN = 0V, IOUT = 0mA 4
Input Leakage Current ILEAK 1 μA VEN = 0V, OUT grounded 4
Dropout Voltage VDropout 300 550 mV IOUT = 300mA 4
Output Voltage Accuracy VOUT -2 2 % TA = -40°C to 85°C, IOUT = 30mA 4
Line Regulation ΔVOUT/ΔVIN/V 0.01 0.2 %/V VIN = (VOUT +1V) to VIN-Max, VEN = VIN, IOUT = 1mA 4
Load Regulation ΔVOUT/VOUT -0.6 0.6 % VIN = (VOUT +1V) to VIN-Max, IOUT from 1mA to 300mA 4
Current Limit ILIMIT 400 600 mA VOUT/ROUT = 1A 4
EN Input Logic Low Voltage VIL 0.4 V VIN = VIN-Min to VIN-Max 4
EN Input Logic High Voltage VIH 1.4 V VIN = VIN-Min to VIN-Max 4
EN Input Current IEN -1 1 μA VIN = 0V or VIN-Max 4
Start-up Time tST 80 μs VEN = 0V to 2.0V, VOUT = 1V, IOUT = 300mA 4
PSRR PSRR 65 dB VIN = [VOUT +1V]VDC + 0.5VppAC, f = 100Hz, IOUT =30mA 4
Short-circuit Current ISHORT 100 mA VIN = VIN-Min to VIN-Max, VOUT < 0.2V 4
Thermal Shutdown Threshold TSHDN 140 °C 4
Thermal Shutdown Hysteresis THYS 15 °C 4
Thermal Resistance Junction-to-Ambient SOT25 θJA 190 °C/W Note 5: device mounted on FR-4 substrate PCB, minimum recommended pad layout, 2oz copper, single sided 4

CAD (KiCad official)

  • Symbol: AP7331-33WG-7
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-25 (KiCad packages3D, STEP)
  • 3D model files: ap7331-33wg-7-etched.step / ap7331-33wg-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap7331-33wg-7.step / ap7331-33wg-7.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (13 pp, sha256 9fdedb2b73161d34, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF