TPS78101DDCR from Texas Instruments, in a TSOT-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	IN	power_in	Input supply pin, 2.2V to 5.5V operating range (6.0V absolute max). Requires a small ceramic input capacitor (typ 1.0µF) to ground for stability; input and output capacitor grounds should be tied back to the IC ground with no significant impedance between them.
2	GND	power_in	Ground reference pin. Ground pin current is typically 1.0µA at IOUT = 0mA and 8µA at IOUT = 150mA; drops to ~18nA in shutdown.
3	EN	input	CMOS-logic-compatible enable input. Driving EN above 1.2V (VHI) turns the regulator on; driving EN below 0.4V (VLO) puts the regulator into shutdown, reducing operating current to ~18nA typical. EN absolute max is VIN + 0.3V or 6.0V, whichever is less. EN pin current is typically 40nA at VEN = VSET = 5.5V.
4	VSET/FB	input	Dual-function pin: on adjustable versions (TPS78101) this is the feedback (FB) input tied to the external resistor divider from OUT; internal reference VFB = 1.216V. On fixed-voltage/dual-level versions this is the VSET select pin - driving VSET below 0.4V selects VOUT(HIGH); driving VSET above 1.2V selects VOUT(LOW). VSET pin current is typically 70nA at VEN = VSET = 5.5V.
5	OUT	power_out	Regulated output voltage pin, 150mA maximum. Requires a small (1µF typ) ceramic capacitor from OUT to GND for stability. Dropout voltage is 250mV max at 150mA; internal current limit is 150-400mA (typ 230mA) at 0.90 × VOUT(NOM). Adjustable range 1.22V (VFB) to 5.25V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TPS78101DDCR
TPS78101DDCRDDCT
TPS78101DDCRDRVR
TPS78101DDCRDRVT

CAD (KiCad official)

Symbol: TPS78101DDCR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: TSOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tps78101ddcr.step`	85 KB	You want the bare part, or you mark your own boards.
`tps78101ddcr-etched.step`	2.2 MB	You want the part with `TPS78101DDCR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 530 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 (28 pp, sha256 b3bc91f74778dc8b, 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