# TPS259531DSGT

**Texas Instruments** · Surge Protection Devices (SPDs) · WSON-8-EP(2x2)

TPS259531DSGT from Texas Instruments, in a WSON-8-EP(2x2). 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 | dVdt | bidirectional | A capacitor from this pin to GND sets the output turn-on slew rate, and the pin must be left floating for the fastest slew rate; the pin voltage is limited to 2.5 V absolute maximum. |
| 2 | EN/UVLO | input | This is the active-high enable input for the TPS259531 (x1 variant) and a resistor divider can set the undervoltage lockout threshold; it must not be left floating and its recommended range is 0 V to 6 V (7 V absolute maximum). |
| 3 | IN | power_in | This is the power input, rated 2.7 V to 18 V recommended (20 V absolute maximum) for the TPS2595x0/1/3 variants. |
| 4 | IN | power_in | This is the power input (second IN pin, internally tied to pin 3), rated 2.7 V to 18 V recommended (20 V absolute maximum) for the TPS2595x0/1/3 variants. |
| 5 | OUT | power_out | This is the power output (switched output of the internal eFuse FET), with the output voltage limited to VIN + 0.3 V and an output pulse of at least -1.2 V for less than 1 µs. |
| 6 | FLT | output | This is an open-drain fault indicator that is pulled low when a fault is detected and requires an external pull-up resistor; it can sink up to 10 mA and its voltage is limited to 0 V to 6 V. |
| 7 | ILM | bidirectional | An external resistor from this pin to GND sets the output current limit (RILM 487 Ω to 5000 Ω for active current limiting), the pin voltage can monitor load current, and it must not be left floating. |
| 8 | GND | power_in | This is the device ground reference pin. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-8-EP(2x2) |
| Category | Circuit Protection |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `TPS259531DSGT`
- Footprint: `Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm`
- 3D model: WSON-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `tps259531dsgt-etched.step` / `tps259531dsgt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps259531dsgt.step` / `tps259531dsgt.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/tps2595) (49 pp, sha256 `c6982dad9247501e`, 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/tps259531dsgt-datasheet.pdf)