AP2127K-2.8TRG1
Public Unreviewedby Ray
Diodes Incorporated AP2127K 2 8TRG1 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
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README
markdownAP2127K-2.8TRG1
Diodes Incorporated AP2127K 2 8TRG1 · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
AP2127K-2.8TRG1 from Diodes Incorporated AP2127K 2 8TRG1, 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 | Regulator power input. Operating range 2.5V to 6V (abs max 6.5V). Bypass to GND with a 1µF ceramic capacitor placed close to the pin to ensure input stability and low noise. |
| 2 | GND | power_in | Device ground reference and return for input/output currents. Tie directly to the system ground plane; use a wide copper trace to minimise noise. |
| 3 | Shutdown | input | Active-low enable/shutdown control. Drive high (≥1.5V) to enable the regulator; drive low (≤0.5V) to disable the LDO. When shutdown is asserted, an internal ~60Ω MOSFET auto-discharges VOUT to GND. An internal 3MΩ pull-down keeps the part off if left floating. Abs max input range -0.3V to VIN+0.3V. |
| 4 | NC | unconnected | No Connection on fixed-output (2.8V) version. On the adjustable AP2127K-ADJ variant this same pin becomes the ADJ feedback input; on the fixed 2.8V part it should be left floating (or optionally tied to GND). |
| 5 | VOUT | power_out | Regulated 2.8V output, 300mA continuous (400mA typical current limit, 50mA short-circuit clamp). Requires a 1µF or larger low-ESR ceramic capacitor (X5R/X7R) to GND placed close to the pin for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated AP2127K 2 8TRG1 |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
AP2127K-2.8TRG1AP2127K-2.8TRG1N-1.0TRG1AP2127K-2.8TRG1N-1.2TRG1AP2127K-2.8TRG1N-1.5TRG1AP2127K-2.8TRG1N-1.8TRG1AP2127K-2.8TRG1N-2.5TRG1AP2127K-2.8TRG1N-2.8TRG1AP2127K-2.8TRG1N-3.0TRG1AP2127K-2.8TRG1N-3.3TRG1AP2127K-2.8TRG1N3-1.2TRG1AP2127K-2.8TRG1N3-1.5TRG1AP2127K-2.8TRG1R-3.3TRG1
CAD (KiCad official)
- Symbol:
AP2127K-2.8TRG1 - 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 |
|---|---|---|
ap2127k-2-8trg1.step |
85 KB | You want the bare part, or you mark your own boards. |
ap2127k-2-8trg1-etched.step |
2.3 MB | You want the part with AP2127K-2.8TRG1 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 573 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 AP2127K 2 8TRG1 datasheet (24 pp, sha256
d48c96ac985d348a, 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).