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LM1117MDT-ADJ

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HGSEMI Linear Voltage Regulators (LDO), TO-252-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM1117MDT-ADJ

HGSEMI · Linear Voltage Regulators (LDO) · TO-252-2

LM1117MDT-ADJ from HGSEMI, in a TO-252-2. 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 reference for fixed-voltage versions and ADJ (adjust) pin for the adjustable LM1117-ADJ version, which needs an output capacitor of at least 22µF tantalum.
2 VOUT power_out Regulated output voltage pin, up to 1A output current with 1.2V dropout at 1A; the package tab is also connected to VOUT.
3 VIN power_in Input operating voltage pin, recommended maximum 15V and absolute maximum 20V.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-252-2
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
Reference voltage VREF 1.238 1.25 1.262 V LM1117-ADJ, IOUT=10mA, VIN-VOUT=2V, TJ=25℃ 4
Reference voltage (over range) VREF 1.225 1.25 1.27 V 10mA≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V 4
Line regulation Rline 3 7 mV VINMIN ≤VIN≤ 12V, VOUT=Fixed/Adj, IOUT=10mA 4
Load regulation Rload 6 12 mV 10mA≤IOUT≤ 1A,VOUT=Fixed/Adj 4
Dropout voltage Vdrop 1 1.2 V IOUT=100mA 4
Dropout voltage Vdrop 1.05 1.25 V IOUT=500mA 4
Dropout voltage Vdrop 1.1 1.3 V IOUT=1A 4
Quiescent current Iq 5 10 mA 4.25V≤VIN≤ 6.5V 4
Ripple rejection PSRR 60 75 dB fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP 4
Adjust pin current Iadj 60 120 µA 4
Adjust pin current change 0.2 5 µA 0≤ IOUT≤1A, 1.4V ≤VIN-VOUT≤10V 4
Current limit Ilimit 1.2 1.4 1.5 A 4
Input voltage VIN 15 V 4
Operating junction temperature TJ -40 125 °C 4
Input operating voltage VIN 20 V 3
Lead temperature TLEAD 260 °C TO-252, soldering 10 s 3
Junction temperature TJ 150 °C 3
Storage temperature TSTG -65 150 °C 3
ESD capability ESD 2000 V minimum 3
Thermal resistance junction-ambient θJA 100 ℃/W TO-252-2, no heatsink 4
Output voltage temperature stability TSOUT 0.3 % 4
Thermal shutdown point TSD 150 ℃ 4
Temperature stability 0.5 % 4
Long-term stability 0.3 % Tamb=125°C, 1000Hrs 4
RMS output noise 0.003 % % of VOUT, 10Hz≤f≤10kHz 4

CAD (KiCad official)

  • Symbol: LM1117MDT-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)
  • 3D model files: lm1117mdt-adj-etched.step / lm1117mdt-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm1117mdt-adj.step / lm1117mdt-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (12 pp, sha256 2486968a9dcfb2fd, retrieved 2026-10-22, 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), 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