component
LM5109BMA
Public Made by Adomby adom
Texas Instruments Gate Drivers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM5109BMA
Texas Instruments · Gate Drivers · SOIC-8
LM5109BMA from Texas Instruments, 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 | VDD | power_in | Positive gate drive supply - Locally decouple to VSS using low ESR and ESL capacitor located as close to IC as possible. |
| 2 | HI | input | High-side control input - The HI input is compatible with TTL and CMOS input thresholds. Unused HI input must be tied to ground and not left open. |
| 3 | LI | input | Low-side control input - The LI input is compatible with TTL and CMOS input thresholds. Unused LI input must be tied to ground and not left open. |
| 4 | VSS | power_in | Ground - All signals are referenced to this ground. |
| 5 | LO | output | Low-side gate driver output - Connect to the gate of the low-side N-MOS device. |
| 6 | HS | power_in | High-side source connection - Connect to the negative terminal of the bootstrap capacitor and to the source of the high-side N-MOS device. |
| 7 | HO | output | High-side gate driver output - Connect to the gate of the high-side N-MOS device. |
| 8 | HB | power_in | High-side gate driver positive supply rail - Connect the positive terminal of the bootstrap capacitor to HB and the negative terminal of the bootstrap capacitor to HS. The bootstrap capacitor must be placed as close to IC as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Motor Driver ICs |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM5109BMA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm5109bma-etched.step/lm5109bma-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm5109bma.step/lm5109bma.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
8e29b5a213117fac, retrieved 2026-10-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).