# TPS2556DRBR

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

TPS2556DRBR 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; internally connected to PowerPAD thermal pad, must be externally connected to PowerPAD |
| 2 | IN | input | Input supply voltage (2.5V to 6.5V); requires 0.1µF or larger ceramic capacitor to GND |
| 3 | IN | input | Input supply voltage (2.5V to 6.5V); requires 0.1µF or larger ceramic capacitor to GND |
| 4 | EN | input | Enable input (active-low); logic low turns on power switch for TPS2556 |
| 5 | ILIM | output | Current limit threshold setting output; external resistor 20kΩ to 187kΩ to GND sets current limit |
| 6 | OUT | output | Power-switch output; supplies current-limited power to load |
| 7 | OUT | output | Power-switch output; supplies current-limited power to load |
| 8 | FAULT | output | Fault signal output (active-low open-drain); asserted during overcurrent or overtemperature conditions |
| 9 | PowerPAD | 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: `TPS2556DRBR`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps2556drbr-etched.step` / `tps2556drbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps2556drbr.step` / `tps2556drbr.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/tps2556drbr-datasheet.pdf)