component

LD3985M27R

Public Made by Adom

by 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.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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LD3985M27R

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

LD3985M27R 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 VI power_in Input voltage of the LDO, operating from 2.5 V to 6 V, with absolute maximum DC input of -0.3 V to 6 V.
2 GND power_in Common ground pin for the regulator.
3 VINH input Inhibit input: ON mode when VINH is at or above 1.2 V, OFF mode when VINH is at or below 0.4 V, and it must not be left floating because it is not internally pulled down or up.
4 BYPASS passive Bypass pin where an external capacitor, usually 10 nF, must be connected to minimize output noise voltage.
5 VO power_out Regulated output voltage of the LDO; for the LD3985M27R this is the 2.7 V version, delivering up to 150 mA.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-23-5L
Category Power Management (PMIC)
Pins 5

CAD (KiCad official)

  • Symbol: LD3985M27R
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: ld3985m27r-etched.step / ld3985m27r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld3985m27r.step / ld3985m27r.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (19 pp, sha256 d909f94a6b4df434, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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