REF3033AIDBZR 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	Supply voltage input (V+). Operating range VREF + 1mV (typ dropout) up to 5.5V; recommended VIN ≥ 3.35V for the 3.3V REF3033. Quiescent current 42µA typ / 50µA max.
2	OUT	output	Precision voltage reference output. 3.30V nominal (±0.2% initial accuracy, 3.294V-3.306V). Sources up to 25mA; stable without an external load capacitor. Short-circuit current typ 45mA to GND.
3	GND	power_in	Ground / common return (V−). Absolute maximum V+ to V− is 7.0V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

REF3033AIDBZR
REF3033AIDBZT

CAD (KiCad official)

Symbol: REF3033AIDBZR
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
`ref3033aidbzr.step`	59 KB	You want the bare part, or you mark your own boards.
`ref3033aidbzr-etched.step`	2.4 MB	You want the part with `REF3033AIDBZR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 584 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 (17 pp, sha256 ffa7c37e7b71c282, 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