TPS2051BDBVR from Texas Instruments, in a SOT-23-5. 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	OUT	power_out	Power-switch output. Delivers current from IN through the internal 70 mΩ high-side N-channel MOSFET to the load; up to 500 mA continuous with a typical 1 A current limit.
2	GND	power_in	Ground reference for the device.
3	OC	output	Overcurrent open-drain fault output, active-low. Asserts (pulls low) after a deglitch delay when the switch enters current-limit or thermal-shutdown. Requires an external pull-up resistor.
4	EN	input	Enable input. On the TPS2051B (205xB series) EN is active-high: logic high turns on the power switch, logic low disables it.
5	IN	power_in	Input supply voltage, 2.7 V to 5.5 V. Feeds the internal high-side MOSFET and control circuitry; bypass locally with a 0.1 µF capacitor.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

TPS2051BDBVR
TPS2051BDBVRDBVT
TPS2051BDBVRD
TPS2051BDBVRDR
TPS2051BDBVRDGN
TPS2051BDBVRDGNR

CAD (KiCad official)

Symbol: TPS2051BDBVR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tps2051bdbvr.step`	85 KB	You want the bare part, or you mark your own boards.
`tps2051bdbvr-etched.step`	2.3 MB	You want the part with `TPS2051BDBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 567 faces against 102 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 b8e3d6d124f7aa62, 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