component
L4931CD33-TR
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, 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
markdownL4931CD33-TR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SO-8
L4931CD33-TR from STMicroelectronics, in a SO-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 | VOUT | power_out | Regulated 3.3 V output, up to 250 mA, requiring a 2.2 µF to 10 µF output capacitor with ESR 0.1 to 10 Ω for stability. |
| 2 | GND | power_in | Ground pin. |
| 3 | GND | power_in | Ground pin. |
| 4 | NC | unconnected | No internal connection. |
| 5 | INHIBIT | input | TTL-compatible shutdown control input; logic low max 0.8 V enables the regulator, logic high min 2 V puts it in OFF mode. |
| 6 | GND | power_in | Ground pin. |
| 7 | GND | power_in | Ground pin. |
| 8 | VIN | power_in | Unregulated input voltage, operating up to 20 V (absolute maximum 20 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
L4931CD33-TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
l4931cd33-tr-etched.step/l4931cd33-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l4931cd33-tr.step/l4931cd33-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (32 pp, sha256
42bf56a6e95ed577, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).