# TL432C

**PJSEMI** · Voltage References · SOT-23

TL432C from PJSEMI, in a SOT-23. 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 | REF | input | Reference input of the shunt regulator, sensing the divider voltage against the 1.24V internal reference (IREF max 10mA absolute maximum). |
| 2 | CATHODE | passive | Cathode (K) of the shunt regulator, operating from VREF up to 18V with 0.1mA to 100mA cathode current (absolute max VKA 20V). |
| 3 | ANODE | power_in | Anode (A) of the shunt regulator, normally connected to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PJSEMI |
| Package | SOT-23 |
| Category | Power Management ICs |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference Input Voltage TL432C (0.5%) | VREF | 1.234 | 1.24 | 1.246 | V | VKA=VREF, IKA=10mA | 4 |
| Deviation of VREF over temperature | ΔVREF |  | 2 | 10 | mV | VKA=VREF, IKA=10mA, 0°C ≤TA≤70°C | 4 |
| Deviation of VREF over temperature | ΔVREF |  | 3 | 15 | mV | VKA=VREF, IKA=10mA, -20°C ≤TA≤125°C | 4 |
| Deviation of VREF over temperature | ΔVREF |  | 8 | 25 | mV | VKA=VREF, IKA=10mA, -40°C ≤TA≤125°C | 4 |
| Ratio of change in VREF to change in VKA | ΔVREF/ΔVKA |  | -0.5 | -1.5 | mV/V | IKA=10mA, ΔVKA=VREF~16V | 4 |
| Reference Input Current | IREF |  | 0.15 | 0.4 | µA | IKA=10mA, R1=10KΩ, R2=∞ | 4 |
| Deviation of Reference Input Current over full temperature range | ΔIREF |  |  | 0.4 | µA | IKA=10mA, R1=10KΩ, R2=∞, -20°C ≤TA≤+85°C | 4 |
| Minimum Cathode Current for Regulation | IKA(MIN) |  |  | 80 | µA | VKA=VREF | 4 |
| Off-State Cathode Current | IKA(OFF) |  | 0.04 | 0.5 | µA | VKA=18V, VREF=0 | 4 |
| Dynamic Impedance | ZKA |  | 0.05 | 0.15 | Ω | VKA=VREF, IKA=1~100mA, f≤1.0KHz | 4 |
| Cathode Voltage | VKA |  |  | 20 | V | Ta=25℃ | 3 |
| Cathode Current Range (Continuous) | IKA | -100 |  | 100 | mA | Ta=25℃ | 3 |
| Reference Input Current Range | IREF |  |  | 10 | mA | Ta=25℃ | 3 |
| Operating Junction Temperature | TJ |  |  | 150 | °C | Ta=25℃ | 3 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C | Ta=25℃ | 3 |
| Cathode Voltage | VKA | 1.24 |  | 18 | V | min is VREF | 3 |
| Cathode Current | IKA | 0.1 |  | 100 | mA |  | 3 |
| Operating Ambient Temperature Range | TOPR | -40 |  | 125 | °C |  | 3 |
| Junction-to-Ambient thermal resistance | RθJA |  | 416 |  | °C/W | SOT-23 | 3 |

## CAD (KiCad official)

- Symbol: `TL432C`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tl432c-etched.step` / `tl432c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl432c.step` / `tl432c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PJSEMI datasheet](docs/tl432c-datasheet.pdf) (10 pp, sha256 `d871c643559a7cc0`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/tl432c-datasheet.pdf)