H7650-40GR from Shanghai Siproin Microelectronics, in a SOT-223. 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 positive supply input. Absolute maximum -0.3V to 9V; operating up to 8V. A 1uF input capacitor (CIN) to VSS is recommended close to the pin.
2	VSS	power_in	Device ground / common return for VIN and VOUT. Should be tied to a single-point GND as shown in the application circuit. Also the thermal path via the SOT-223 tab (tab is electrically connected to VSS on this pinout).
3	VOUT	power_out	Regulated output, factory-trimmed to 4.0V (±2%) on the -40 suffix, capable of 750mA typical (1.1A absolute max) with ~0.13V typical dropout at 200mA. Requires an output capacitor COUT of 1uF tantalum or 6.8uF ceramic for stability.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-223
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

H7650-40GRPR
H7650-40GRPG
H7650-40GR
H7650-40GRGG
H7650-40GRM5R
H7650-40GRM5G

CAD (KiCad official)

Symbol: H7650-40GR
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Shanghai Siproin Microelectronics datasheet (7 pp, sha256 2363f11ce49fd71c, 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