# TL4051BIDBZR

**Texas Instruments** · Voltage Reference · SOT-23-3

TL4051BIDBZR from Texas Instruments, in a SOT-23-3. 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 | FB | input | Feedback input of the adjustable version, where the external R1/R2 divider sets VZ = VREF(1 + R2/R1) with a typical VREF of 1.212 V. |
| 2 | CATHODE | passive | Shunt reference cathode (output) connected to the supply through series resistor RS, with continuous cathode voltage up to 15 V and cathode current limited to 12 mA recommended. |
| 3 | ANODE | power_in | Anode (ground return) of the shunt reference; pin 3 must be left floating or connected to pin 2 because of a parasitic Schottky diode between pins 2 and 3. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TL4051BIDBZR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `tl4051bidbzr-etched.step` / `tl4051bidbzr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl4051bidbzr.step` / `tl4051bidbzr.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/tl4051a12) (33 pp, sha256 `739b8ac05dcb64a5`, retrieved 2026-10-07, 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-sonnet-5-5` (text+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/tl4051bidbzr-datasheet.pdf)