component

LR7544-T

Public Made by Adom

by adom

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

componentpower management icslr7544-tfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 15d ago
viewers lr7544-t: viewers · Ray 15d ago
lr7544-t-etched.glb Publish 0.1.0 · Ray 15d ago
lr7544-t-etched.step lr7544-t: factory component page (tier=lcsc) · Ray 15d ago
lr7544-t-hero.glb lr7544-t: hero GLB from the etched model (keeps the MPN mark) · Ray 15d ago
lr7544-t-hero.overlay.json Publish 0.1.0 · Ray 15d ago
lr7544-t.glb Publish 0.1.0 · Ray 15d ago
lr7544-t.kicad_mod Publish 0.1.0 · Ray 15d ago
lr7544-t.kicad_sym Publish 0.1.0 · Ray 15d ago
lr7544-t.lbr Publish 0.1.0 · Ray 15d ago
lr7544-t.step Publish 0.1.0 · Ray 15d ago
package.json Publish 0.1.0 · Ray 15d ago
page.json Set visibility: public · Ray 15d ago
README.md Publish 0.1.0 · Ray 15d ago

LR7544-T

LR · Linear Voltage Regulators (LDO) · SOT-23

LR7544-T from LR, in a SOT-23. 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 VSS power_in Ground pin (VSS/GND) of the regulator, the reference for all voltage values.
2 VOUT power_out Regulated 4.4V output (±2%) delivering 100mA typical, with a 1-10uF output capacitor recommended.
3 VIN power_in Supply input accepting up to 24V operating (32V absolute maximum), with an input bypass capacitor of 1-10uF recommended.

Key specifications

Parameter Value
Manufacturer LR
Package SOT-23
Category Power Management ICs
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
Output Voltage Tolerance VOUT -2 2 % VIN=VOUT+2V, IOUT=10mA 5
Input Voltage VIN 24 V ISS=5uA 5
Line Regulation △VOUT -30 30 mV VOUT+2V≤VIN≤24V, IOUT=5mA 5
Load Regulation △VOUT -50 50 mV VIN=VOUT+2V, 1mA≤IOUT≤100mA 5
Dropout Voltage at 50mA VDrop 320 390 450 mV IOUT=50mA, △VOUT=±2%*VOUT 5
Dropout Voltage at 100mA VDrop 600 750 900 mV IOUT=100mA, △VOUT=±2%*VOUT 5
Quiescent Current ISS 1.5 5 uA VIN=VOUT+2V 5
Temperature Coefficient △VOUT/(△Ta*VOUT) -100 100 ppm/℃ VIN=VOUT+2V, IOUT=10mA, -40℃≤Ta≤85℃ 5
Maximum Input Voltage VIN 32 V 4
Maximum Output Current IOUT 150 mA 4
Power Dissipation SOT23B PD 250 mW SOT23B 4
Operating Temperature TOPR -40 105 ℃ 4
Storage Temperature TSTG -40 125 ℃ 4
ESD HBM -3000 3000 V H.B.M POS/NEG 4
Thermal Resistance Junction-Ambient SOT23-3L θJA 500 °C/W SOT23-3L 8
Output Current IOUT 100 mA VIN=VOUT+2V 5
PSRR 100Hz PSRR 75 dB VIN=VOUT+2V, IOUT=10mA, f=100Hz 5
PSRR 1kHz PSRR 55 dB VIN=VOUT+2V, IOUT=10mA, f=1kHz 5
PSRR 10kHz PSRR 40 dB VIN=VOUT+2V, IOUT=10mA, f=10kHz 5
Short-circuit Current ISCP 20 mA VOUT=GND 5
Over Current IOCP 120 mA 5

CAD (KiCad official)

  • Symbol: LR7544-T
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: lr7544-t-etched.step / lr7544-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr7544-t.step / lr7544-t.glb are the bare package body.

Provenance

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

  • Datasheet: LR datasheet (13 pp, sha256 0b58c65ef75e4ef4, retrieved 2026-10-22, tier: lcsc)
  • 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