# 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](docs/h7121-1-datasheet.pdf) (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](docs/h7121-1-datasheet.pdf)