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H7121-1

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Shanghai Siproin Microelectronics Linear Voltage Regulators (LDO), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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H7121-1

Shanghai Siproin Microelectronics · Linear Voltage Regulators (LDO) · SOT-23

H7121-1 from Shanghai Siproin Microelectronics, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the regulator, shown at bottom left in the SOT23 top view.
2 VOUT power_out Regulated 2.1V output (2.058V to 2.142V at IOUT=10mA) with output current of 30mA min and 50mA typ at VIN=4.1V.
3 VIN power_in Supply input with an absolute maximum of -0.3V to 18V and a specified maximum input voltage of 15V.

Key specifications

Parameter Value
Manufacturer Shanghai Siproin Microelectronics
Package SOT-23
Category Power Management ICs
Pins 3

CAD (KiCad official)

  • Symbol: H7121-1
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: h7121-1-etched.step / h7121-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); h7121-1.step / h7121-1.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Siproin Microelectronics datasheet (16 pp, sha256 b56d63e4e3666e63, retrieved 2026-11-02, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF