# TPS2045DR

**Texas Instruments** · Power Distribution Switches · SOIC-8

TPS2045DR from Texas Instruments, in a SOIC-8. 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 reference pin for the device. |
| 2 | IN | power_in | Input voltage pin for the power switch; the device operates from 2.7 V to 5.5 V and the switch turns off when input voltage falls below approximately 2 V (undervoltage lockout). |
| 3 | IN | power_in | Input voltage pin for the power switch, listed with pin 2 as part of the IN terminal; operating range 2.7 V to 5.5 V. |
| 4 | EN | input | Active-low enable input: a logic low turns on the power switch, and a logic high disables the switch and reduces supply current to less than 10 µA. |
| 5 | OC | output | Open-drain overcurrent output that is asserted active low during an overcurrent or overtemperature condition and stays asserted until the condition is removed. |
| 6 | OUT | power_out | Power-switch output; under overload or short circuit the output is limited to a constant current (0.44 A typical short-circuit current limit at 25°C). |
| 7 | OUT | power_out | Power-switch output, listed with pins 6 and 8 as part of the OUT terminal; output current is limited to 0.44 A typical under overload. |
| 8 | OUT | power_out | Power-switch output, listed with pins 6 and 7 as part of the OUT terminal; output current is limited to 0.44 A typical under overload. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TPS2045DR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `tps2045dr-etched.step` / `tps2045dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps2045dr.step` / `tps2045dr.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/lit/ds/symlink/tps2045.pdf) (26 pp, sha256 `ffa19a8969d40cda`, retrieved 2026-10-08, tier: manufacturer)
- **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/tps2045dr-datasheet.pdf)