HE9073A25M5R from HEERMICR, 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	Unregulated supply input. Operating range 2.0 V to 7.0 V (abs max 9.0 V). Bypass with CIN >= 4.7 µF to GND close to the pin.
2	GND	power_in	Device ground reference for the regulator and internal reference. Connect to system ground.
3	CE	input	Chip Enable (active-high). VIH >= 1.2 V enables the regulator; VIL <= 0.4 V places the device in shutdown (ISD <= 0.1 µA). Do not leave floating; abs max VON/OFF = VIN + 0.3 V.
4	NC	unconnected	No internal connection. Leave floating or tie to GND; do not use as a signal via.
5	VOUT	power_out	Regulated 2.5 V output (±1%). Delivers up to ~500 mA typical (550 mA current limit). Requires COUT >= 4.7 µF ceramic to GND for stability.

Key specifications

Parameter	Value
Manufacturer	HEERMICR
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

HE9073A25M5R
HE9073A25M5RMR
HE9073A25M5RPR
HE9073A25M5RD4R

CAD (KiCad official)

Symbol: HE9073A25M5R
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: HEERMICR datasheet (12 pp, sha256 27a01576a32d0f6f, 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