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LM1084IT-ADJ

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HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM1084IT-ADJ

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220-3L

LM1084IT-ADJ from HGSEMI, in a TO-220-3L. 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; in the adjustable (-ADJ) version it sets the output via VOUT = VREF×(1+R2/R1) + IADJ×R2, with IADJ typically 55 µA and at most 120 µA.
2 VOUT power_out Regulated output voltage; a tantalum output capacitor of at least 22 µF is required for stability, and stability decreases as output current increases.
3 VIN power_in Input supply voltage; the absolute maximum is 20 V and the recommended input voltage is 12 V, with the dropout about 1.5 V at 5 A.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-220-3L
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=3V) VREF 1.231 1.25 1.269 V IOUT=10mA, VIN-VOUT=3V 3
Reference voltage (10mA≤IOUT≤5A) VREF 1.225 1.25 1.275 V 10mA≤IOUT≤5A, 1.5V≤VIN-VOUT≤5V 3
Line regulation (ADJ) ΔVOUT 0.015 0.2 % IOUT=10mA, 2.85V≤VIN≤10V 4
Load regulation (ADJ) ΔVOUT 0.1 0.4 % 0mA≤IOUT≤5A, VIN-VOUT=3V 4
Dropout voltage VDROP 1.45 1.5 V IOUT=5A, ΔVREF, ΔVOUT=1% 4
Current limit ILIMIT 5.5 6.5 A VIN-VOUT=3V 4
Minimum load current (ADJ) ILOAD(MIN) 3 10 mA VIN=10V (LM1084-ADJ) 4
Quiescent current IQ 5 10 mA VIN=10V (LM1084) 4
Ripple rejection PSRR 60 72 dB fRIPPLE=120Hz, COUT=25μF tantalum, IOUT=5A, VIN-VOUT=3V 4
Adjust pin current IADJ 55 120 μA VIN=4.25V, IOUT=10mA 4
Adjust pin current change ΔIADJ 0.2 5 μA 10mA≤IOUT≤5A, 1.5V≤(VIN-VOUT)≤4.5V 4
Input voltage (recommended) VIN 12 V 3
Operating junction temperature range (recommended, TO220/TO-263) TJ -40 125 °C TO220/TO-263 package 3
Input voltage (absolute maximum) VIN 20 V 3
Lead temperature (soldering) TLEAD 245 ℃ TO-263/TO-220, soldering 10 s 3
Operating junction temperature range (absolute maximum) TJ 150 ℃ 3
Storage temperature TS -65 150 ℃ 3
ESD capability (minimum) ESD 2000 V 3
Temperature stability 0.5 % IOUT=10mA, VIN-VOUT=1.5V 4
Long-term stability 0.5 % Tamb=125°C, 1000Hrs 4
RMS noise (% of VOUT) 0.003 % 10Hz≤f≤10kHz 4
Thermal resistance junction-to-ambient (TO-220-3L) θJA 60 ℃/W TO-220-3L 4

CAD (KiCad official)

  • Symbol: LM1084IT-ADJ
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220-3L (KiCad packages3D, STEP)
  • 3D model files: lm1084it-adj-etched.step / lm1084it-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm1084it-adj.step / lm1084it-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (11 pp, sha256 8ced581695e85829, 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