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AP2138N-3.0TRG1

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Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AP2138N-3.0TRG1

Diodes Incorporated · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

AP2138N-3.0TRG1 from Diodes Incorporated, in a SOT-23-3. 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 GND power_in Ground reference pin for the regulator, shown as pin 1 of the SOT-23-3 package in the pin table.
2 VOUT power_out Regulated output voltage; the datasheet requires an output capacitor of more than 1µF with ESR between 0.01Ω and 100Ω for stability, with ceramic capacitors recommended.
3 VIN power_in Input voltage with a recommended range of 2.5V to 6.0V and an absolute maximum rating of 6.6V, and a 1µF input filter capacitor is required.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23-3
Category Power Management (PMIC)
Pins 3

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 6 V 13
Output Voltage VOUT 2.94 3 3.06 V 13
Quiescent Current IQ 1 1.5 µA IOUT = 0 13
Output Current IOUT 250 mA 13
Load Regulation VRLOAD 25 40 mV 1mA ≤ IOUT ≤ 100mA 13
Line Regulation VRLINE 6 18 mV 4V ≤ VIN ≤ 6V 13
Dropout Voltage VDROP 25 100 mV IOUT = 10mA 13
Dropout Voltage VDROP 70 200 mV IOUT = 30mA 13
Dropout Voltage VDROP 200 400 mV IOUT = 100mA 13
Dropout Voltage VDROP 450 700 mV IOUT = 250mA 13
Output Voltage Temperature Coefficient ∆VOUT/∆T -300 300 µV/°C 13
Output Voltage Temperature Coefficient (relative) (∆VOUT/VOUT)/∆T -100 100 ppm/°C 13
Input Voltage VIN 2.5 6 V 4
Operating Ambient Temperature Range TA -40 85 °C 4
Input Voltage VIN 6.6 V 4
ESD (Machine Model) ESD 350 V 4
ESD (Human Body Model) ESD 2000 V 4
Lead Temperature TLEAD 260 °C 4
Junction Temperature TJ 150 °C 4
Storage Temperature Range TSTG -65 150 °C 4
Thermal Resistance Junction-to-Ambient (SOT-23-3) θJA 250 °C/W 4
Thermal Resistance Junction-to-Case (SOT-23-3) θJC 81.9 °C/W 13

CAD (KiCad official)

  • Symbol: AP2138N-3.0TRG1
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: ap2138n-3-0trg1-etched.step / ap2138n-3-0trg1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap2138n-3-0trg1.step / ap2138n-3-0trg1.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (29 pp, sha256 027e80492a5bc199, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), 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