TPLP5907MFX-1.8 from TECH PUBLIC, 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	VIN	power_in	Input supply voltage. Operating range 1.2V to 5.5V (abs max 6.5V). Bypass with 1µF ceramic capacitor to GND.
2	GND	power_in	Device ground reference. Connect to system ground.
3	EN	input	Enable control input. Drive above VENH (typ 0.7V, max 0.9V) to enable the regulator; drive below VENL (typ 0.65V, min 0.4V) to shut down. IEN < 0.1µA at VEN = 5.5V. Do not leave floating.
4	NC	unconnected	No internal connection. Leave floating or tie to GND for mechanical stability.
5	VOUT	power_out	Regulated output voltage, fixed at 1.8V for the -1.8 option. Delivers up to 300mA. Requires 1µF ceramic or tantalum output capacitor for stability. Actively discharged (~80Ω) when EN is low.

Key specifications

Parameter	Value
Manufacturer	TECH PUBLIC
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

TPLP5907MFX-1.8

CAD (KiCad official)

Symbol: TPLP5907MFX-1.8
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: TECH PUBLIC datasheet (10 pp, sha256 b051b77e59e93bb5, retrieved 2026-08-17, tier: lcsc)
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