component

LR8203A-T28

Public Made by Adom

by adom

LR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LR8203A-T28

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

LR8203A-T28 from LR, in a SOT-23-3L. 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 GND power_in Ground reference for the regulator; all voltages are specified relative to GND, and a large ground copper area is recommended for noise immunity and heat dissipation.
2 VOUT power_out Regulated 2.8V output (±2%) for LR8203A-T28, delivering 300mA typical, with short-circuit current clamped to 25mA typical and an output capacitor of at least 1uF required.
3 VIN power_in Supply input with 6.5V operating input voltage maximum (9V absolute maximum), requiring a ceramic bypass capacitor of at least 1uF placed close to the pin.

Key specifications

Parameter Value
Manufacturer LR
Package SOT-23-3L
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input voltage VIN 6.5 V ISS=5uA 4
Output voltage accuracy (T28, 2.8 V nominal) VOUT -2 2 % VIN=VOUT+1V, IOUT=10mA 4
Enable voltage VCE 0.7 1.2 V VIN=2.2V, IOUT=1mA 4
Line regulation △VOUT -30 30 mV VOUT+1V≤VIN≤7V, IOUT=10mA 4
Load regulation △VOUT -40 40 mV VIN=VOUT+1V, 1mA≤IOUT≤100mA 4
Quiescent current ISS 6 8 uA VIN=VOUT+1V 5
Output voltage temperature coefficient △VOUT/(△Ta*VOUT) -100 50 100 ppm/℃ VIN=VOUT(T)+1V, IOUT=10mA, -40℃≤Ta≤85℃ 5
Maximum input supply voltage VIN 9 V 4
Maximum output current IOUT 450 mA 4
Power dissipation (SOT23-3L) PD 250 mW SOT23-3L package 4
Operating temperature TOPR -10 85 ℃ 4
Storage temperature TSTG -40 125 ℃ 4
ESD HBM -2000 2000 V H.B.M POS/NEG 4
Maximum junction temperature (absolute limit) TJ 150 ℃ 8
Recommended maximum junction temperature TJ 125 ℃ recommended for normal operation 8
Input capacitor CIN 1 uF ceramic recommended 8
Output capacitor COUT 1 uF ceramic 8
Input and output capacitor range (layout guidance) CIN=COUT 1 10 uF layout guidance 10

CAD (KiCad official)

  • Symbol: LR8203A-T28
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: lr8203a-t28-etched.step / lr8203a-t28-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr8203a-t28.step / lr8203a-t28.glb are the bare package body.

Provenance

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

  • Datasheet: LR datasheet (11 pp, sha256 8b1b776f9ac601ed, retrieved 2026-10-17, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF