# H8118A33PR

**Shanghai Siproin Microelectronics** · DC-DC Converters · SOT-89-3

H8118A33PR from Shanghai Siproin Microelectronics, in a SOT-89-3. 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 | GND pin, the ground reference for the device. |
| 2 | VOUT | power_out | Output voltage pin; absolute maximum voltage is VSS-0.3 V to VSS+8 V, and the output is settable from 2.1 V to 5.5 V in 0.1 V steps. |
| 3 | LX | output | External inductor connection pin; absolute maximum voltage is VSS-0.3 V to VSS+8 V and absolute maximum pin current is 1000 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Siproin Microelectronics |
| Package | SOT-89-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage Operating Start (VOUT pin voltage, absolute) | VOUT | -0.3 |  | 8 | V | Referenced to VSS | 2 |
| EN Pin Voltage | EN | -0.3 |  | 8 | V | Referenced to VSS | 2 |
| LX Pin Voltage | VLX | -0.3 |  | 8 | V | Referenced to VSS | 2 |
| LX Pin Current | ILX |  |  | 1000 | mA |  | 2 |
| Power Dissipation (SOT-89-3) | PD |  |  | 500 | mW |  | 2 |
| Operating Temperature | TOPR | -40 |  | 85 | ℃ |  | 2 |
| Storage Temperature | TSTG | -40 |  | 125 | ℃ |  | 2 |
| Soldering Temperature | TSOLDER |  |  | 260 | ℃ | 10 s | 2 |
| Input Voltage | VIN |  |  | 7.5 | V |  | 3 |
| Operation Start Voltage | VST1 |  |  | 0.9 | V | IOUT=1mA, VOUT=2.2V~4.2V | 3 |
| Input Current At No Load | ISS |  | 15 | 25 | uA | VIN=1.8V, VOUT=3.0V | 3 |
| Input Current At No Load | ISS |  | 25 | 35 | uA | VIN=0.9V, VOUT=3.0V | 3 |
| Current Consumption 2 | ISS2 |  | 6 | 10 | uA | VOUT=VOUT(s)+0.5V | 3 |
| Current Consumption During Shutdown | ISSS |  |  | 1 | uA | VEN=0V | 3 |
| Maximum Oscillation Frequency | fosc |  |  | 300 | KHz | VOUT=0.95xVOUT(s), measure waveform at LX pin | 3 |
| Duty Ratio1 | Duty1 | 70 | 78 | 85 | % | VOUT=0.95xVOUT(s) | 3 |
| Efficiency | EFF1 | 90 |  |  | % |  | 3 |
| Shutdown Pin Input Voltage (high) | VSH | 0.75 |  |  | V |  | 3 |
| Oscillation Stop at LX pin (shutdown pin input voltage low) | VSL1 |  |  | 0.3 | V | VOUT=0.95xVOUT(s), judge oscillation at LX pin | 3 |
| Shutdown Pin Input Current (high) | ISH | -0.1 |  | 0.1 | uA | VEN=6V | 3 |
| Shutdown Pin Input Current (low) | ISL | -0.1 |  | 0.1 | uA | VEN=0V | 3 |

## CAD (KiCad official)

- Symbol: `H8118A33PR`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `h8118a33pr-etched.step` / `h8118a33pr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `h8118a33pr.step` / `h8118a33pr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Siproin Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911870811627520) (6 pp, sha256 `b86cbaa950a423ac`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/h8118a33pr-datasheet.pdf)