# TPS2557QDRBTQ1

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

TPS2557QDRBTQ1 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 the PowerPAD (thermal pad). |
| 2 | IN | power_in | Input voltage, rated 2.5 V to 6.5 V; connect a 0.1 μF or greater ceramic capacitor from IN to GND as close to the IC as possible. |
| 3 | IN | power_in | Input voltage, rated 2.5 V to 6.5 V; 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 the TPS2557-Q1 (active-high): logic high turns on the power switch; VIH minimum 1.1 V, VIL maximum 0.66 V, enable voltage range 0 V to 6.5 V. |
| 5 | ILIM | output | External resistor connection that sets the current-limit threshold; recommended 20 kΩ ≤ R(ILIM) ≤ 187 kΩ. |
| 6 | OUT | output | Power-switch output; continuous output current 0 A to 5 A. |
| 7 | OUT | output | Power-switch output; continuous output current 0 A to 5 A. |
| 8 | FAULT | output | Active-low open-drain output asserted during overcurrent or overtemperature; recommended continuous sink current 0 mA to 10 mA (absolute maximum 25 mA). |
| 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: `TPS2557QDRBTQ1`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps2557qdrbtq1-etched.step` / `tps2557qdrbtq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps2557qdrbtq1.step` / `tps2557qdrbtq1.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-q1) (29 pp, sha256 `834c00966c31670e`, retrieved 2026-10-08, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tps2557qdrbtq1-datasheet.pdf)