# TPS61040DDCR

**Texas Instruments** · LED Drivers · SOT-23-5

TPS61040DDCR 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 | SW | output | Switch pin connected to internal N-channel power MOSFET drain; attach external inductor and Schottky diode to this pin; maximum voltage rating 30V. |
| 2 | GND | power_in | Ground reference. |
| 3 | FB | input | Feedback input pin for connecting external voltage divider to program output voltage up to 28V; input bias current 1μA typical. |
| 4 | EN | input | Enable control input; pull to ground to enter shutdown mode with quiescent current below 1μA; pin must not be left floating and must be terminated. |
| 5 | VIN | power_in | Power supply input; operating voltage range 1.8V to 6V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | LED Drivers |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TPS61040DDCR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tps61040ddcr-etched.step` / `tps61040ddcr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps61040ddcr.step` / `tps61040ddcr.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/tps61041) (39 pp, sha256 `d192004ca7a38ac4`, retrieved 2026-10-01, 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-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/tps61040ddcr-datasheet.pdf)