TL432AIDBZR 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/threshold input. Internal error amplifier compares this pin's voltage to the internal 2.495 V bandgap reference. Typical Iref = 2 µA, max 4 µA (10 µA absolute max). Setting REF equal to Vref (2.495 V) with an external resistor divider between CATHODE and ANODE programs the regulated cathode voltage VKA = Vref × (1 + R1/R2).
2	CATHODE	passive	Shunt current/voltage input (K). Sinks 1 mA to 100 mA (150 mA absolute max) when the device is in regulation. VKA operates from Vref up to 36 V (37 V abs max). Off-state leakage typ 0.1 µA at VKA = 36 V, Vref = 0. Dynamic impedance
3	ANODE	passive	Common pin (A), normally connected to circuit ground / low side of the divider. All device voltages are referenced to ANODE unless otherwise stated.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

TL432AIDBZR
TL432AIDBZT
TL432AIDBZRIDBVR
TL432AIDBZRIDBVT
TL432AIDBZRIPK

CAD (KiCad official)

Symbol: TL432AIDBZR
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tl432aidbzr.step`	59 KB	You want the bare part, or you mark your own boards.
`tl432aidbzr-etched.step`	1.7 MB	You want the part with `TL432AIDBZR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 428 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (74 pp, sha256 eefaeb640dec3168, retrieved 2026-08-17, tier: manufacturer)
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