# LKS523

**LINKOSEMI** · Isolators - Gate Drivers · SOP-8

LKS523 from LINKOSEMI, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Low-side and logic supply voltage. Recommended operating range 10V to 20V (absolute max 25V). Provides the internal logic bias and low-side gate drive rail. |
| 2 | HIN | input | Logic input for the high-side driver channel. Compatible with 3.3V/5V/15V logic (VIH >= 2.4V, VIL <= 0.6V). Referenced to COM. |
| 3 | LIN | input | Logic input for the low-side driver channel. Compatible with 3.3V/5V/15V logic (VIH >= 2.4V, VIL <= 0.6V). Referenced to COM. |
| 4 | COM | power_in | Logic ground and low-side driver return. Common reference for VCC, HIN, LIN, and the LO output. |
| 5 | LO | output | Low-side gate driver output. Drives the gate of the low-side N-channel MOSFET/IGBT; swings between COM and VCC. Typical peak sink/source ~800mA/1.2A. |
| 6 | VS | power_in | High-side driver floating return (source of the high-side MOSFET / emitter of the IGBT). Offset voltage range -5V to 600V; allowable dVs/dt = 50 V/ns. |
| 7 | HO | output | High-side floating gate driver output. Drives the high-side N-channel MOSFET/IGBT gate; swings between VS and VB. |
| 8 | VB | power_in | High-side floating supply (bootstrap). Recommended VB = VS + 10V to VS + 20V (absolute max 625V referenced to COM). Typically supplied via a bootstrap diode and capacitor from VCC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LINKOSEMI |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `LKS523`

## CAD (KiCad official)

- Symbol: `LKS523`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lks523-etched.step` / `lks523-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lks523.step` / `lks523.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LINKOSEMI datasheet](docs/lks523-datasheet.pdf) (12 pp, sha256 `25023009ae00348c`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lks523-datasheet.pdf)