H7605-18MR 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 reference for the regulator. Connect to system ground; place the 1.0 µF ceramic input and output caps' return here.
2	VOUT	power_out	Regulated 1.8 V output (fixed by laser trimming, tolerance ±2%). Rated 300 mA (Pd-limited). Requires a 1.0 µF ceramic output capacitor (CL) to ground for stability; low-ESR ceramics are supported.
3	VIN	power_in	Unregulated supply input. Operating range up to 6 V typ (8 V max), absolute max 10 V. Dropout ~0.28 V typ at 100 mA for the 1.8 V variant. Bypass with 1.0 µF ceramic (CIN) to GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

H7605-18MR
H7605-18MRMG
H7605-18MRNR
H7605-18MRNG
H7605-18MRPR
H7605-18MRPG

CAD (KiCad official)

Symbol: H7605-18MR
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