# AZ431BN-TP

**TECH PUBLIC** · Voltage Reference · SOT-23

AZ431BN-TP from TECH PUBLIC, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | REF | input | Reference (feedback) input. Internally compared against the 2.500 V bandgap; drives the output transistor to hold this pin at Vref. Typical reference input current 0.7 uA (max 4.0 uA); max ±10 mA absolute. |
| 2 | CATHODE | passive | Cathode (K) of the shunt regulator. Sinks the regulation current from the load through an external bias resistor. Operating cathode current 1.0 mA to 100 mA (abs max -100 to +150 mA); Vka up to 36 V; dynamic impedance ~0.15 Ω typ. |
| 3 | ANODE | passive | Anode (A) of the shunt regulator; reference node for Vka and Vref. Typically tied to circuit ground/return. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

- `AZ431BN-TP`

## CAD (KiCad official)

- Symbol: `AZ431BN-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `az431bn-tp-etched.step` / `az431bn-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `az431bn-tp.step` / `az431bn-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/az431bn-tp-datasheet.pdf) (5 pp, sha256 `af258e73aec7d5cb`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/az431bn-tp-datasheet.pdf)