# H8118A45M5R

**Shanghai Siproin Microelectronics** · DC-DC Converters · SOT-23-5

H8118A45M5R from Shanghai Siproin Microelectronics, in a SOT-23-5. 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 | EN | input | Shutdown pin: H level gives normal operation and L level stops the step-up; the shutdown input voltage is VSH min 0.75 V and VSL max 0.3 V, with absolute maximum EN pin voltage VSS-0.3 to VSS+8 V. |
| 2 | VOUT | power_out | Output voltage pin; absolute maximum VOUT pin voltage is VSS-0.3 to VSS+8 V. |
| 3 | NC | unconnected | No connection (N.C.). |
| 4 | GND | power_in | GND pin. |
| 5 | LX | output | External inductor connection pin; absolute maximum LX pin voltage is VSS-0.3 to VSS+8 V and LX pin current is 1000 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Siproin Microelectronics |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `H8118A45M5R`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `h8118a45m5r-etched.step` / `h8118a45m5r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `h8118a45m5r.step` / `h8118a45m5r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Siproin Microelectronics datasheet](docs/h8118a45m5r-datasheet.pdf) (6 pp, sha256 `b86cbaa950a423ac`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/h8118a45m5r-datasheet.pdf)