component
L6981NDR
Public Made by Adomby adom
STMicroelectronics DC-DC Converters, SO-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
markdownL6981NDR
STMicroelectronics · DC-DC Converters · SO-8
L6981NDR from STMicroelectronics, in a SO-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 | SW | output | Switching node output for the internal power stage. |
| 2 | BOOT | output | Bootstrap capacitor pin; connect 100 nF external capacitor between BOOT and SW to supply high-side gate drive voltage. |
| 3 | VCC | power_in | Analog power supply input; connect ≥1 µF ceramic capacitor to filter voltage reference. |
| 4 | VOUT/FB | input | Feedback input for adjustable versions; use external resistor divider to set output voltage to 0.85 V nominal reference. |
| 5 | EN/CLKIN | input | Enable input; enable rising threshold 1.08-1.32 V (typical 1.2 V), disable falling threshold ~1.0 V; in LNM versions also accepts external clock (200-500 kHz) for synchronization. |
| 6 | AGND | power_in | Analog ground reference. |
| 7 | VIN | power_in | DC input voltage supply; operating range 3.5 V to 38 V. |
| 8 | PGND | power_in | Power ground reference. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
L6981NDR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
l6981ndr-etched.step/l6981ndr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l6981ndr.step/l6981ndr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (52 pp, sha256
17a8f3f2678e811a, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).