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AP2138N-2.5TRG1

Public Made by Adom

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Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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AP2138N-2.5TRG1

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

AP2138N-2.5TRG1 from Diodes Incorporated, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the regulator. Connect directly to the system ground plane.
2 VOUT power_out Regulated output voltage, fixed 2.5V ±2% (1.5% typ). Supplies up to 250mA. Requires a >1µF ceramic output capacitor (ESR 0.01Ω-100Ω) for stability.
3 VIN power_in Input supply voltage, 2.5V to 6.0V recommended (6.6V absolute max). Requires a 1µF ceramic input capacitor. Dropout ~700mV at 100mA load.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23-3
Category PMIC
Pins 3

Ordering variants

  • AP2138N-2.5TRG1
  • AP2138N-2.5TRG1AP2138R-2.5TRG1
  • AP2138N-2.5TRG1AP2138RA-2.5TRG1
  • AP2138N-2.5TRG1AP2139AK-2.5TRG1

CAD (KiCad official)

  • Symbol: AP2138N-2.5TRG1
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: ap2138n-2-5trg1-etched.step / ap2138n-2-5trg1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap2138n-2-5trg1.step / ap2138n-2-5trg1.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ap2138n-2-5trg1.step 59 KB You want the bare part, or you mark your own boards.
ap2138n-2-5trg1-etched.step 2.4 MB You want the part with AP2138N-2.5TRG1 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 581 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (29 pp, sha256 027e80492a5bc199, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF