H7605-28MR from Shanghai Siproin Microelectronics, in a SOT-23. 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	GND	power_in	Ground / VSS return. Common reference for input and output. Absolute maximum output voltage is referenced VSS-0.3V to VIN+0.3V.
2	VOUT	power_out	Regulated LDO output. For the -28 option this is 2.8V nominal (±2% over 1.0mA to 30mA). Rated for up to 300mA output current (Pd limited). Requires a 1.0uF ceramic output capacitor to ground for stability.
3	VIN	power_in	Unregulated input supply. Recommended operating input up to 6V (typ), 8V max; absolute maximum 10V. Bypass with a 1.0uF ceramic capacitor to ground. Dropout typ. 0.19V at 100mA for VOUT >= 2.8V.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

H7605-28MR
H7605-28MRMG
H7605-28MRNR
H7605-28MRNG
H7605-28MRPR
H7605-28MRPG

CAD (KiCad official)

Symbol: H7605-28MR
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Shanghai Siproin Microelectronics datasheet (6 pp, sha256 363a66b804bb6b8a, 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