TP2803E18-5 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 pin. Operating range 1.2V to 5.5V (absolute max 6.5V vs GND). A 1µF ceramic bypass capacitor to GND is recommended close to the pin.
2	GND	power_in	Device ground reference. Carries the ~2µA quiescent current and the internal reference return.
3	EN	input	Enable control input. Drive high (VIH ≥ 1.0V) to turn the regulator on; drive low (VIL ≤ 0.4V) to enter shutdown (~0.1µA typical). Absolute max -0.3V to 6V vs GND; input current typ 10nA at VEN=5V.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for mechanical stability.
5	VOUT	power_out	Regulated output pin, fixed 1.8V ±2%, up to 400mA load. A 1µF ceramic (or tantalum) output capacitor to GND is required for stability. Absolute max -0.3V to 6V vs GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TP2803E18-5

CAD (KiCad official)

Symbol: TP2803E18-5
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 (9 pp, sha256 a0fdf9193d659bab, 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