# ATL432LIBIDBZR

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

ATL432LIBIDBZR from Texas Instruments, in a SOT-23-3. 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 with maximum 0.4 µA bias current for programmable output voltage setting |
| 2 | CATHODE | output | Regulated output voltage and current sink pin rated for maximum 37 V and continuous 0.1 mA to 15 mA |
| 3 | ANODE | power_in | Common ground reference pin, typically connected to system ground |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Supply Chip |
| 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 voltage (B grade, 0.5%) | VREF | 2487 | 2500 | 2512 | mV | VKA = Vref, IKA = 1mA; ATL43xLIBx device | 5 |
| Initial reference voltage tolerance at 25°C (B grade) |  | -0.5 |  | 0.5 | % | 25°C, B grade | 1 |
| Reference voltage deviation over temperature range (I grade) | VI(dev) |  | 6 | 17 | mV | VKA = Vref, IKA = 1mA; ATL43xLIxI device | 5 |
| Reference voltage change per cathode voltage change, ΔVKA = 10V - Vref | ΔVref / ΔVKA |  | -1.4 | -2.7 | mV/V | IKA = 1mA; ΔVKA = 10V - Vref | 5 |
| Reference voltage change per cathode voltage change, ΔVKA = 36V - 10V | ΔVref / ΔVKA |  | -1 | -2 | mV/V | IKA = 1mA; ΔVKA = 36V - 10V | 5 |
| Reference input current | Iref |  | 0.2 | 0.4 | µA | IKA = 1mA, R1 = 10kΩ, R2 = ∞ | 5 |
| Reference input current deviation over temperature range | II(dev) |  | 0.1 | 0.3 | µA | IKA = 1mA, R1 = 10kΩ, R2 = ∞ | 5 |
| Minimum cathode current for regulation | Imin |  | 65 | 80 | µA | VKA = Vref | 5 |
| Off-state cathode current | Ioff |  | 0.1 | 1 | µA | VKA = 36V, Vref = 0 | 5 |
| Dynamic impedance | /ZKA/ |  | 0.3 | 0.65 | Ω | VKA = Vref, IKA = 1mA to 15mA | 5 |
| Cathode voltage (recommended) | VKA |  |  | 36 | V |  | 4 |
| Continuous cathode current range (recommended) | IKA | 0.1 |  | 15 | mA |  | 4 |
| Operating free-air temperature (I grade) | TA | -40 |  | 85 | °C | ATL43xLIxI, natural air | 4 |
| Cathode voltage (absolute maximum) | VKA |  |  | 37 | V |  | 4 |
| Continuous cathode current range (absolute maximum) | IKA | -10 |  | 18 | mA |  | 4 |
| Reference input current (absolute maximum) | II(ref) | -5 |  | 10 | mA |  | 4 |
| Operating junction temperature range | TJ | -40 |  | 150 | °C |  | 4 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 4 |
| Junction-to-ambient thermal resistance (DBZ, 3 pin) | RθJA |  | 371.7 |  | °C/W |  | 4 |
| Junction-to-case (top) thermal resistance (DBZ, 3 pin) | RθJC(top) |  | 145.9 |  | °C/W |  | 4 |
| Junction-to-board thermal resistance (DBZ, 3 pin) | RθJB |  | 104.7 |  | °C/W |  | 4 |
| Junction-to-top characterization parameter (DBZ, 3 pin) | ψJT |  | 23.9 |  | °C/W |  | 4 |
| Junction-to-board characterization parameter (DBZ, 3 pin) | ψJB |  | 102.9 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `ATL432LIBIDBZR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `atl432libidbzr-etched.step` / `atl432libidbzr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atl432libidbzr.step` / `atl432libidbzr.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/atl431li) (40 pp, sha256 `68e0ac1b6eb6b764`, retrieved 2026-09-17, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/atl432libidbzr-datasheet.pdf)