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LM1117MK-ADJ

Public Made by Adom

by adom

HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM1117MK-ADJ

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

LM1117MK-ADJ from HGSEMI, in a SOT-89-3. 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/ADJ power_in Ground/adjust pin; on the ADJ version it sets the output voltage through the external divider, with adjust-pin current Iadj typically 60 µA and at most 120 µA.
2 VOUT output Regulated output voltage; the adjustable version requires an output capacitor of at least 22 µF tantalum for stability, and stability decreases as output current increases.
3 VIN power_in Input operating voltage; the recommended input voltage is 12 V maximum, and the absolute maximum input voltage is 15 V.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOT-89-3
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
Reference voltage (IOUT=10mA, VIN-VOUT=2V, TJ=25°C) VREF 1.231 1.25 1.268 V IOUT=10mA, VIN-VOUT=2V, TJ=25°C 5
Reference voltage (full range) VREF 1.225 1.25 1.275 V 10mA≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V 5
Current limit Ilimit 2.1 2.5 A 5
Ripple rejection ratio PSRR 60 75 dB fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP 5
Line regulation Rline 9 18 mV VINMIN ≤VIN≤ 12V, VOUT=Fixed/Adj, IOUT=10mA 5
Load regulation Rload 10 18 mV 10mA≤IOUT≤800mA, VOUT=Fixed/Adj 5
Dropout voltage at IOUT=100mA Vdrop 1 1.2 V IOUT=100mA 5
Dropout voltage at IOUT=500mA Vdrop 1.05 1.25 V IOUT=500mA 5
Dropout voltage at IOUT=800mA Vdrop 1.2 1.3 V IOUT=800mA 5
Quiescent current Iq 5 10 mA 4.25V≤VIN≤ 6.5V 5
Adjust pin current Iadj 60 120 μA 5
Adjust pin current change Iadj 0.2 5 μA 0≤ IOUT≤800mA, 1.4V ≤VIN-VOUT≤10V 5
Input voltage (absolute maximum) VIN 15 V 4
Lead temperature (soldering) TLead 260 °C soldering, 10 s 4
Operating junction temperature (absolute maximum) TJ 150 °C 4
Storage temperature Tstg -65 150 °C 4
ESD capability (minimum value) ESD 2000 V 4
Input voltage (recommended operating) VIN 12 V 4
Operating junction temperature range (recommended) TJ -40 125 °C 4

CAD (KiCad official)

  • Symbol: LM1117MK-ADJ
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: lm1117mk-adj-etched.step / lm1117mk-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm1117mk-adj.step / lm1117mk-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (10 pp, sha256 14d5d7f5b1118842, retrieved 2026-10-19, 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-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