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LM1084MDT-ADJ

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

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LM1084MDT-ADJ

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

LM1084MDT-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 ADJ input Adjust pin of the LM1084-ADJ (labelled GND/ADJ in the datasheet) that sets the output voltage via the R1/R2 divider, VOUT = VREF×(1+R2/R1)+IADJ×R2, with VREF 1.25V typ and IADJ 55µA typ, 120µA max.
2 VOUT power_out Regulated output voltage pin, which needs an output capacitor of at least 22µF tantalum for stability and also connects to the tab.
3 VIN power_in Input supply pin with 20V absolute maximum and 12V recommended input voltage, requiring 1.5V max dropout at 5A output.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-252-2
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
Input operating voltage (absolute maximum) VIN 20 V 3
Storage temperature TS -65 150 V 3
ESD capability (minimum) ESD 2000 V 3
Operating junction temperature range (absolute maximum table) TJ 150 ℃ 3
Pin temperature, soldering 10 s (TO-252) TLEAD 260 ℃ TO-252, soldering 10 s 3
Operating junction temperature range (recommended) TJ 0 125 °C 3
Reference voltage VREF 1.231 1.25 1.269 V LM1084-ADJ, IOUT=10mA, VIN-VOUT=3V 3
Reference voltage VREF 1.225 1.25 1.275 V LM1084-ADJ, 10mA≤IOUT≤5A, 1.5V≤VIN-VOUT≤5V 3
Line regulation ΔVOUT 0.015 0.2 % LM1084-ADJ, IOUT=10mA, 2.85V≤VIN≤10V 3
Load regulation ΔVOUT 0.1 0.4 % LM1084-ADJ, 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 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 钽电容, 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
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 % of VOUT 10Hz≤f≤10kHz 4
Recommended input voltage VIN 12 V 3
Junction-to-ambient thermal resistance (TO-252-2) θJA 100 ℃/W TO-252-2 4

CAD (KiCad official)

  • Symbol: LM1084MDT-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)
  • 3D model files: lm1084mdt-adj-etched.step / lm1084mdt-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm1084mdt-adj.step / lm1084mdt-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (10 pp, sha256 6982d7dc69dbce8b, 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-sonnet-5-5 (text+vision), consensus claude-opus-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