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HG7544MK-1

Public Made by Adom

by adom

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

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HG7544MK-1

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

HG7544MK-1 from HGSEMI, in a SOT-89. 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 power_in Ground pin, the reference for the regulator. The datasheet gives no separate limit for this pin.
2 VIN power_in Input pin; the absolute maximum supply voltage is -0.3V to +36V, and the datasheet specifies a maximum input voltage of 36V.
3 VOUT power_out Regulated output pin; the 7544-1 nominal output is 4.4V (4.312V to 4.488V at 10mA), and the datasheet requires an output capacitor greater than 2.2uF to ground.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOT-89
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
Output voltage VOUT 4.312 4.4 4.488 V VIN=VOUT+2V, IOUT=10mA 4
Output current IOUT 70 100 mA VIN=VOUT+2V 4
Load regulation ΔVOUT 25 60 mV VIN=VOUT+2V, 1mA ≤ IOUT ≤ 50mA 4
Dropout voltage VDIF 2 4 mV IOUT=1mA, △Vo=2% 4
Quiescent current ISS 2 3 uA No load 4
Input voltage regulation (line regulation) 0.2 %/V Vo+1V≤VIN≤36V, IOUT=1mA 4
Output voltage tolerance (accuracy) -2 2 % 1
Input voltage VIN 36 V 4
Temperature coefficient 100 ppm/℃ IOUT=10mA, -40℃<Ta<85℃ 4
Power supply voltage (absolute maximum) -0.3 36 V 2
Operating ambient temperature -40 85 ℃ 2
Storage temperature range -45 140 ℃ 2
Thermal resistance, junction to ambient (SOT89) θJA 200 ℃/W No ambient airflow, no heatsink (assumed) 2
Power dissipation (SOT89) PD 0.5 W Ta=25℃ 2

CAD (KiCad official)

  • Symbol: HG7544MK-1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: hg7544mk-1-etched.step / hg7544mk-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hg7544mk-1.step / hg7544mk-1.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (8 pp, sha256 e17aedb4156facfc, 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