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LK112M18TR

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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.

componentpower management (pmic)lk112m18trfactory-2.0.0extractor-text

Verified LK112M18TR

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 5 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LK112M18TR · SOT-23-5L · 5 pins
  • ✓copper: 5 copper pads, none touching another net
  • ✓datasheet: all 5 pin names found in the 18-page datasheet
  • ✓distributor: lcsc C2971117, digikey 497-7806-2-ND, mouser 511-LK112M18
  • ✓family: SOT-23-5
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-7_ipuzxn/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 5 pins = 5 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 5 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lk112m18tr.kicad_sym✓ lk112m18tr.kicad_mod✓ lk112m18tr.step
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3D Model

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Symbol & Footprint

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Contents

README

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LK112M18TR

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

LK112M18TR 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 SHDN input Shutdown input disables the regulator when it is connected to GND or to a positive voltage less than 0.6 V.
2 GND power_in Ground pin is internally connected to the die attach flag to decrease the total thermal resistance and increase the package ability to dissipate power.
3 Bypass passive Bypass pin with 0.1 µF to improve the noise performance.
4 OUT power_out Output port.
5 IN power_in Input port.

Key specifications

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

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Quiescent current, on mode Iq 175 250 µA On mode (except ISHDN) 6
Quiescent current, off mode Iq 0 0.1 µA VI = 8V, VSHDN = 0V 6
Output voltage tolerance VO -2 2 % IO = 30mA 6
Line regulation ΔVO 0.7 20 mV VI = VO+1V to VO+6V, VO ≤ 5.6V 6
Load regulation ΔVO 15 30 mV IO = 1 to 60mA 6
Load regulation ΔVO 25 90 mV IO = 1 to 150mA 6
Shutdown input current ISHDN 12 35 µA VSHDN = 1.8V, output on 6
Output voltage temperature coefficient ΔVO/TJ 0.09 mV/°C IO = 10mA 6
Output current limit IO 150 mA 6
Supply voltage rejection SVR 55 dB VI = VO+1.5V, CBYP = 0.1µF; CO = 10µF, f = 400Hz, IO = 30mA 6
Output noise voltage eN 30 µVrms B = 10Hz to 80kHz, CBYP = 0.1µF; CO = 10µF, VI = VO+1.5V, IO = 60mA 6
Shutdown input logic, output on VSHDN 1.8 V Output on 6
Shutdown input logic, output off VSHDN 0.6 V Output off 6
DC input voltage VI 16 V 5
DC input voltage (shutdown pin) VSHDN 16 V 5
Storage temperature range TSTG -55 150 °C 5
Operating junction temperature range TOP -40 125 °C 5
Thermal resistance junction-case RthJC 81 °C/W SOT23-5L 5
Thermal resistance junction-ambient RthJA 255 °C/W SOT23-5L 5

CAD (KiCad official)

  • Symbol: LK112M18TR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: lk112m18tr-etched.step / lk112m18tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lk112m18tr.step / lk112m18tr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (18 pp, sha256 fc1c9dfacf62927c, retrieved 2026-11-05, tier: manufacturer)
  • 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