TPS61040DBVR 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	SW	input	Switch pin connected to the drain of the internal power MOSFET. Connect the inductor and the Schottky diode to this pin. Maximum switch voltage 30V; internal MOSFET current limit 400mA (TPS61040), RDS(on) typ 600mΩ.
2	GND	power_in	Device ground reference. All voltages are referenced to this pin.
3	FB	input	Feedback pin. Connect to the external resistor divider from VOUT to program the desired output voltage. Internal reference (VFB) is 1.233V typical (1.208V-1.258V).
4	EN	input	Enable pin. Pulling to ground forces the device into shutdown mode (supply current <1µA). Must not be left floating and needs to be terminated. VIH ≥ 1.3V, VIL ≤ 0.4V.
5	VIN	power_in	Supply voltage pin. Input voltage range 1.8V to 6V (absolute max 7V). Bypass with 4.7µF input 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.

TPS61040DBVR
TPS61040DBVRDBVT
TPS61040DBVRDDC
TPS61040DBVRDDCR
TPS61040DBVRDDCT
TPS61040DBVRDRV
TPS61040DBVRDRVR
TPS61040DBVRDRVT

CAD (KiCad official)

Symbol: TPS61040DBVR
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
`tps61040dbvr.step`	85 KB	You want the bare part, or you mark your own boards.
`tps61040dbvr-etched.step`	2.3 MB	You want the part with `TPS61040DBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 561 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 (39 pp, sha256 6cdca27bfce2aa90, 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