REF3112AIDBZR from Texas Instruments, 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	IN	power_in	Input supply voltage. Operating range VREF + 0.05 V to 5.5 V (minimum supply for REF3112 is 1.8 V). Absolute maximum supply V+ to V- is 7 V.
2	OUT	output	Reference output voltage (1.25 V nominal for REF3112, initial accuracy ±0.2%). Can source or sink up to ±10 mA; no output capacitor required and stable with any capacitive load.
3	GND	power_in	Ground return for the reference. Quiescent current is 115 µA max.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

REF3112AIDBZR
REF3112AIDBZT

CAD (KiCad official)

Symbol: REF3112AIDBZR
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ref3112aidbzr.step`	59 KB	You want the bare part, or you mark your own boards.
`ref3112aidbzr-etched.step`	1.9 MB	You want the part with `REF3112AIDBZR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 502 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 (28 pp, sha256 c8d0e0159b24942b, 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