# TPS2556DRBT

**Texas Instruments** · Power Distribution Switches · SON-8-EP(3x3)

TPS2556DRBT from Texas Instruments, in a SON-8-EP(3x3). 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 connection; connect externally to PowerPAD. |
| 2 | IN | input | Input voltage supply; connect a 0.1-µF or greater ceramic capacitor from IN to GND as close to the IC as possible. |
| 3 | IN | input | Input voltage supply; connect a 0.1-µF or greater ceramic capacitor from IN to GND as close to the IC as possible. |
| 4 | EN | input | Enable input for TPS2556; logic low turns on the power switch. |
| 5 | ILIM | output | Current-limit threshold setting pin; external resistor (20 kΩ ≤ RILIM ≤ 187 kΩ recommended) connects from this pin to GND. |
| 6 | OUT | output | Power-switch output. |
| 7 | OUT | output | Power-switch output. |
| 8 | FAULT | tri_state | Active-low open-drain output; asserts low during overcurrent or overtemperature conditions. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SON-8-EP(3x3) |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `TPS2556DRBT`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps2556drbt-etched.step` / `tps2556drbt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps2556drbt.step` / `tps2556drbt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tps2556) (30 pp, sha256 `3101cae5b7acce21`, retrieved 2026-10-03, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/tps2556drbt-datasheet.pdf)