# APL3553ABI-TRG

**Anpec Elec** · Power Distribution Switches · SOT-23-5

APL3553ABI-TRG from Anpec Elec, in a SOT-23-5. 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 | VOUT | power_out | Output voltage pin that follows the input voltage; when the device is disabled it is discharged through an internal resistor (150 Ω typ.), and the absolute maximum VOUT-to-GND rating is -0.3 to 7 V. |
| 2 | GND | power_in | Ground pin; the negative pins of the input and output capacitors and this GND pin must be connected to the load ground plane. |
| 3 | OCB | output | Open-drain fault indication output that goes low after a 12 ms deglitch time when a current-limit or over-temperature condition is detected, and requires an external pull-up resistor. |
| 4 | EN | input | Active-high enable input for the APL3553A variant: a high level (VIH min. 1.4 V) enables the device and a low level (VIL max. 0.6 V) disables it, and the pin cannot be left floating. |
| 5 | VIN | power_in | Power supply input connected to the external DC supply, with a recommended operating range of 2.7 V to 5.5 V and an absolute maximum of 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Anpec Elec |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `APL3553ABI-TRG`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `apl3553abi-trg-etched.step` / `apl3553abi-trg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `apl3553abi-trg.step` / `apl3553abi-trg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Anpec Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917683429916672) (22 pp, sha256 `01b0c0e23447c348`, retrieved 2026-10-09, 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](docs/apl3553abi-trg-datasheet.pdf)