# LM5101CSD

**Texas Instruments** · Gate Drivers · WSON-10-EP(4x4)

LM5101CSD from Texas Instruments, in a WSON-10-EP(4x4). 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 | VDD | power_in | Positive gate drive supply voltage input; locally decouple to VSS using low ESR/ESL capacitor located as close to the IC as possible. |
| 2 | HB | power_in | High-side gate driver bootstrap supply for charging the bootstrap capacitor; connect the positive terminal of the bootstrap capacitor to HB and the negative terminal to HS. |
| 3 | HO | output | High-side gate driver output with 1-A peak output current; connect to the gate of high-side MOSFET with a short, low inductance path. |
| 4 | HS | passive | High-side MOSFET source connection point; connect to the bootstrap capacitor negative terminal and the source of the high-side MOSFET. |
| 5 | NC | unconnected | No internal connection. |
| 6 | NC | unconnected | No internal connection. |
| 7 | HI | input | High-side driver control input with TTL type thresholds for LM5101C; unused inputs should be tied to ground and not left open. |
| 8 | LI | input | Low-side driver control input with TTL type thresholds for LM5101C; unused inputs should be tied to ground and not left open. |
| 9 | VSS | power_in | Ground return; all signals are referenced to this ground. |
| 10 | LO | output | Low-side gate driver output with 1-A peak output current; connect to the gate of the low-side MOSFET with a short, low inductance path. |
| 11 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(4x4) |
| Category | Motor Driver ICs |
| Pins | 11 |

## CAD (KiCad official)

- Symbol: `LM5101CSD`
- Footprint: `Package_SON:WSON-10-1EP_4x4mm_P0.8mm_EP2.6x3mm`
- 3D model: WSON-10-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `lm5101csd-etched.step` / `lm5101csd-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5101csd.step` / `lm5101csd.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm5100a) (48 pp, sha256 `391d008aa275b045`, retrieved 2026-10-03, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/lm5101csd-datasheet.pdf)