AP2125K-3.3TRG1
Public Unreviewedby Ray
Diodes Incorporated AP2125K 3 3TRG1 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownAP2125K-3.3TRG1
Diodes Incorporated · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
AP2125K-3.3TRG1 from Diodes Incorporated, in a SOT-23-5. 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 | VIN | power_in | Input voltage supply pin. Operating range VOUT+0.5V to 6V (abs max 6.5V). Bypass locally with 1µF ceramic capacitor to GND. |
| 2 | GND | power_in | Ground reference for the regulator. Common return for input, output, and enable signals. |
| 3 | CE | input | Active-high chip enable input. Logic high (VCE ≥ 1.5V) enables the regulator; logic low (VCE ≤ 0.4V) forces shutdown (standby current 0.01µA typ). Absolute limits: -0.3V to VIN+0.3V. Do not leave floating. |
| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND for mechanical robustness. |
| 5 | VOUT | power_out | Regulated 3.3V output (±2% accuracy, 3.234V-3.366V). Delivers up to 300mA (min); requires a 1µF ceramic output capacitor for stability. Dropout typ 65mV at 100mA, 200mV at 300mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
AP2125K-3.3TRG1K-1.8TRG1AP2125K-3.3TRG1K-2.5TRG1AP2125K-3.3TRG1K-2.8TRG1AP2125K-3.0TRG1AP2125K-3.3TRG1AP2125K-3.3TRG1K-4.15TRG1AP2125K-3.3TRG1K-4.2TRG1AP2125K-3.3TRG1KS-1.8TRG1AP2125K-3.3TRG1KS-2.5TRG1AP2125K-3.3TRG1KS-2.8TRG1AP2125K-3.3TRG1KS-3.0TRG1AP2125K-3.3TRG1KS-3.3TRG1AP2125K-3.3TRG1KS-4.2TRG1AP2125K-3.3TRG1N-1.8TRG1AP2125K-3.3TRG1N-2.5TRG1AP2125K-3.3TRG1N-2.8TRG1AP2125K-3.3TRG1N-3.0TRG1AP2125K-3.3TRG1N-3.3TRG1AP2125K-3.3TRG1N-4.2TRG1
CAD (KiCad official)
- Symbol:
AP2125K-3.3TRG1 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
ap2125k-3-3trg1.step |
85 KB | You want the bare part, or you mark your own boards. |
ap2125k-3-3trg1-etched.step |
2.5 MB | You want the part with AP2125K-3.3TRG1 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 611 faces against 102 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 (25 pp, sha256
73dd4f47f543db12, 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).