H7210-25M5R from Shanghai Siproin Microelectronics, 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	Power input pin. Supply voltage recommended 2.5V to 5.5V (absolute max 8V). Decouple with a 10uF ceramic capacitor to GND as close to the pin as possible.
2	GND	power_in	Ground reference pin (VSS). Keep the resistance low between VIN and VSS wiring to maintain stability.
3	CE	input	Chip Enable input with CMOS hysteresis. Driving CE high (typically to VIN) enables the regulator; driving CE low (to VSS) shuts the IC down to 0.1uA standby and activates the fast-discharge pull-down on VOUT (on variants with fast-discharge, e.g. H7210-33M5R). Input range 0V to 5.5V. Should be driven to a valid logic level, not left floating.
4	NC	unconnected	No connection. Leave floating or tie to a stable potential; not internally bonded to any active node.
5	VOUT	power_out	Regulated output pin. For the -25 option, VOUT = 2.5V (±2%) with up to 500mA short-term output current capability (typical, Vin-Vout=1V). Requires a >=10uF low-ESR ceramic output capacitor placed as close to the pin as possible for stable phase compensation.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

H7210-25M5R

CAD (KiCad official)

Symbol: H7210-25M5R
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: Shanghai Siproin Microelectronics datasheet (6 pp, sha256 d68700857f3166ee, 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