# TL431BIDCKR-TP

**TECH PUBLIC** · Voltage Reference · SOT-363

TL431BIDCKR-TP from TECH PUBLIC, in a SOT-363. 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 | CATHODE | passive | Cathode of the adjustable shunt regulator, rated 36 V maximum VKA with continuous cathode current of 1.0 mA to 100 mA. |
| 2 | NC | unconnected | No connect; attached to substrate and must be connected to ANODE or left open. |
| 3 | REF | input | Reference input with a nominal 2.495 V reference voltage (2.483 V to 2.507 V), maximum input current 10 mA. |
| 4 | NC | unconnected | No connect; attached to substrate and must be connected to ANODE or left open. |
| 5 | NC | unconnected | No connect; attached to substrate and must be connected to ANODE or left open. |
| 6 | ANODE | power_in | Anode of the regulator, the reference for all voltage values, normally connected to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-363 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TL431BIDCKR-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `tl431bidckr-tp-etched.step` / `tl431bidckr-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431bidckr-tp.step` / `tl431bidckr-tp.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [TECH PUBLIC datasheet](docs/tl431bidckr-tp-datasheet.pdf) (5 pp, sha256 `f72b1075efe57b10`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/tl431bidckr-tp-datasheet.pdf)