# TPS73401DDCT

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

TPS73401DDCT from Texas Instruments, in a SOT-23-5. 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 | IN | power_in | Input supply for the regulator, specified at 2.7 V to 6.5 V with an absolute maximum range of -0.3 V to +7.0 V. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | EN | input | Driving EN high (1.2 V to VIN) enables the regulator and driving it low (0 V to 0.4 V) puts it into shutdown; EN can be tied to IN if unused, and its absolute maximum range is -0.3 V to VIN + 0.3 V. |
| 4 | FB | input | Feedback input to the control-loop error amplifier on the adjustable version (TPS73401), where the internal reference is 1.184 V to 1.232 V (1.208 V typical) and sets the output voltage. |
| 5 | OUT | power_out | Regulator output, which requires a small ceramic capacitor of at least 2.0 µF total typical capacitance from this pin to ground for stability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TPS73401DDCT`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tps73401ddct-etched.step` / `tps73401ddct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps73401ddct.step` / `tps73401ddct.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/tps734) (27 pp, sha256 `d3aae21ede2d1c07`, retrieved 2026-10-08, tier: lcsc)
- **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/tps73401ddct-datasheet.pdf)