component
LDK120M31R
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. 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
markdownLDK120M31R
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LDK120M31R from STMicroelectronics, in a SOT-23-5L. 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 | IN | power_in | Input voltage of the LDO; operating input range is 1.9 V to 5.5 V, and the absolute maximum DC input is -0.3 V to 7 V. |
| 2 | GND | power_in | Common ground reference for the regulator; all voltages are referred to GND. |
| 3 | EN | input | Enable logic input where Low = shutdown and High = active; logic low is 0.4 V max and logic high is 1.2 V min for VIN = 1.9 V to 5.5 V. |
| 4 | BYP | passive | Bypass capacitor pin for noise reduction on the fixed-output version; the capacitor is optional, and if not used the pin must be left floating with no routing on the board. |
| 5 | OUT | power_out | Regulated output voltage of the LDO, guaranteeing 200 mA output current and stable with a ceramic output capacitor of 1 µF (1 to 22 µF range). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
LDK120M31R - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
ldk120m31r-etched.step/ldk120m31r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ldk120m31r.step/ldk120m31r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (24 pp, sha256
1684d802fa69801e, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).