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LR8103A-T30

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by Ray

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

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Symbol & Footprint

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Datasheet

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Contents

README

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LR8103A-T30

LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L

LR8103A-T30 from LR, in a SOT-23-3L. 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 GND power_in Ground reference for the regulator. All voltage measurements are referenced to this pin.
2 VOUT power_out Regulated 3.0V output (±1%), capable of sourcing up to 300mA. Requires an external ceramic output capacitor (≥1µF recommended) for stability. Output current is clamped to ~30mA (ISCP) if the output is shorted to ground.
3 VIN power_in Unregulated input supply, VOUT+1V up to 6.5V operating (9V absolute maximum). Requires an external ceramic bypass capacitor (≥1µF recommended); a series ~10Ω resistor at the input is recommended to absorb upstream voltage spikes.

Key specifications

Parameter Value
Manufacturer LR
Package SOT-23-3L
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LR8103A-T30
  • LR8103B-T30

CAD (KiCad official)

  • Symbol: LR8103A-T30
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: LR datasheet (10 pp, sha256 1164d007f79e861e, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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