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LD2985BM50R

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by Ray

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Datasheet

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Contents

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LD2985BM50R

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

LD2985BM50R from STMicroelectronics, in a SOT-23-5L. 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 IN power_in Unregulated input supply pin (V_I). Operating input voltage 2.5 V to 16 V; absolute max 16 V. Bypass to GND with C_I ≈ 1 µF.
2 GND power_in Device ground reference pin.
3 INHIBIT input TTL-compatible ON/OFF control input. Not internally pulled up and cannot be left floating; drive to GND or below 0.18 V to disable the regulator, drive high to enable. Absolute max V_INH = 16 V.
4 Bypass passive Noise-reduction bypass pin. Connect an external capacitor C_BYP ≈ 10 nF between this pin and GND to reduce output noise to about 30 µVrms.
5 OUT power_out Regulated output (V_O = 5.0 V for the BM50R option). Delivers up to 150 mA with internal current and thermal limiting. Requires an output capacitor C_O ≈ 1 µF for stability.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-23-5L
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LD2985BM18R
  • LD2985BM25R
  • LD2985BM28R
  • LD2985BM30R
  • LD2985BM31R
  • LD2985BM33R
  • LD2985BM50R

CAD (KiCad official)

  • Symbol: LD2985BM50R
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (18 pp, sha256 dc3e89b9bbc8b59a, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF