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LM1117RS-ADJ

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HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM1117RS-ADJ

HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)

LM1117RS-ADJ from HTC Korea TAEJIN Tech, in a TO-252-2(DPAK). 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 ADJ/GND power_in Adjustment/ground pin: in the ADJ version it sets the output voltage through the external divider (adjustment pin current 50 µA typ., 120 µA max. at IO = 100 mA), and it is the ground reference for the fixed-voltage versions.
2 VOUT power_out Regulated output voltage; an output capacitor of 10 µF or larger is needed for LM1117 output stability.
3 VIN power_in Input voltage; DC input voltage absolute maximum is 20 V and the operating input voltage is specified up to 12 V.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package TO-252-2(DPAK)
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 (ADJ) VREF 1.238 1.25 1.262 V VIN=5V, IO=10mA 5
Reference Voltage over load and line (ADJ) VREF 1.219 1.281 V IO=10mA to 1A, VIN-VREF=1.5V to 13.75V, TJ=0~125C 5
Line Regulation (ADJ) ΔVLINE 0.1 0.2 % IO=10mA, VIN-VREF=1.5V to 12V 5
Load Regulation (ADJ) ΔVLOAD 0.2 0.4 % IO=10mA to 1A, VIN-VREF=2V 5
Operating Input Voltage (ADJ) VIN 12 V 5
Adjustment pin Current (ADJ) IADJ 50 120 uA VIN-VREF=1.5V to 12V, IO=100mA 5
Adjustment Pin Current Change (ADJ) ΔIADJ 0.5 5 uA VIN-VREF=1.5V to 12V, IO=100mA to 1A 5
Minimum Load Current (ADJ) IO(MIN) 5 10 mA VIN=5V, VREF=0V 5
Current Limit (ADJ) IO 1000 1250 1600 mA VIN-VREF=5V 5
Supply Voltage Rejection (ADJ) SVR 60 75 dB IO=1A, f=120Hz, VIN-VREF=3V, VRIPPLE=1VPP 5
Dropout Voltage VD 1 1.1 V IO=100mA 9
Dropout Voltage VD 1.1 1.2 V IO=500mA 9
Dropout Voltage VD 1.2 1.3 V IO=1A 9
DC Input Voltage VIN 20 V 1
Lead Temperature (Soldering, 5 seconds) TSOL 260 ℃ 5 seconds soldering 1
Operating Junction Temperature Range TOPR -40 125 ℃ 1
Storage Temperature Range TSTG -65 150 ℃ 1
Thermal Resistance Junction-To-Ambient / TO-252 θJA-TO-252 105 °C/W No heat sink, no air flow, no adjacent heat source, 0.066 inch2 copper area, TA=25°C 12

CAD (KiCad official)

  • Symbol: LM1117RS-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
  • 3D model files: lm1117rs-adj-etched.step / lm1117rs-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm1117rs-adj.step / lm1117rs-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HTC Korea TAEJIN Tech datasheet (12 pp, sha256 44a7a7aa0771cacd, retrieved 2026-10-17, tier: lcsc)
  • 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