# IR2181PBF

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

IR2181PBF from Infineon Technologies, in a PDIP-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 | HIN | input | Logic input for the high side gate driver output HO, in phase, compatible with 3.3V and 5V logic and clamped internally by a 5.2V zener diode. |
| 2 | LIN | input | Logic input for the low side gate driver output LO, in phase, compatible with 3.3V and 5V logic and clamped internally by a 5.2V zener diode. |
| 3 | COM | power_in | Low side return and reference ground for all voltages on the device, with recommended VCC supply range of 10 to 20 V. |
| 4 | LO | output | Low side gate drive output, with VLO between 0 V and VCC. |
| 5 | VCC | power_in | Low side and logic fixed supply, with recommended range of 10 to 20 V and absolute maximum of -0.3 to 25 V. |
| 6 | VS | power_in | High side floating supply return, with offset up to 600 V and transient dV/dt limited to 50 V/ns. |
| 7 | HO | output | High side gate drive output, with VHO between VS and VB. |
| 8 | VB | power_in | High side floating supply, with recommended range of VS + 10 V to VS + 20 V and absolute maximum of -0.3 to 625 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `IR2181PBF`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `ir2181pbf-etched.step` / `ir2181pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ir2181pbf.step` / `ir2181pbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Infineon Technologies datasheet](docs/ir2181pbf-datasheet.pdf) (21 pp, sha256 `1d337b0454755221`, retrieved 2026-10-28, 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/ir2181pbf-datasheet.pdf)