H7211-25M5R 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. Accepts 2.0V to 6.0V (absolute max 7V). Should be decoupled with a low-ESR ceramic capacitor (10μF typical) to VSS.
2	VSS	power_in	Ground reference pin for the LDO.
3	CE	input	Chip Enable pin. Drive high (VCE_H ≥ 1.5V, up to VIN) to enable the regulator; drive low (VCE_L ≤ 0.3V) to enter shutdown mode (<0.1μA) and activate the output discharge shunt (~80Ω).
4	NC	unconnected	No connection. Not internally bonded on the SOT23-5 package; may be left floating or tied to VSS for mechanical stability.
5	VOUT	power_out	Regulated output pin. Output voltage set by the ordering code (1.0V-5.0V range, ±2% accuracy). Supplies up to 300mA. Requires a low-ESR ceramic output capacitor (10μF typical) to VSS for stability.

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.

H7211-25M5R
H7211-25M5RDR

CAD (KiCad official)

Symbol: H7211-25M5R
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 (9 pp, sha256 b0219dac2623b496, 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