# IRS21271STRPBF

**Infineon Technologies** · Gate Drive ICs · SOIC-8

IRS21271STRPBF from Infineon Technologies, in a SOIC-8. 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 | VCC | power_in | Logic and gate drive supply, with a recommended operating range of 10 V to 20 V and an absolute maximum of 25 V. |
| 2 | IN | input | Logic input for gate driver output HO, in phase with HO for the IRS21271, with VIN limited to 0 V to VCC. |
| 3 | FAULT | output | Open-drain, negative-logic output that indicates an over-current shutdown has occurred. |
| 4 | COM | power_in | Logic ground, to which all voltage parameters are referenced. |
| 5 | VS | power_in | High-side floating supply return, rated for a high-side floating offset voltage up to 600 V. |
| 6 | CS | input | Current sense input to the current sense comparator, with a positive-going threshold of 1.8 V typical for the IRS21271. |
| 7 | HO | output | High-side gate drive output, swinging between VS and VB. |
| 8 | VB | power_in | High-side floating supply, rated at VS + 9 V to VS + 20 V for the IRS21271. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Infineon Technologies |
| Package | SOIC-8 |
| Category | Power Management ICs |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `IRS21271STRPBF`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `irs21271strpbf-etched.step` / `irs21271strpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `irs21271strpbf.step` / `irs21271strpbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Infineon Technologies datasheet](docs/irs21271strpbf-datasheet.pdf) (21 pp, sha256 `dfe4bffe9eeffea4`, 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/irs21271strpbf-datasheet.pdf)