component
HG7544MK-1
Public Made by Adomby 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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHG7544MK-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hg7544mk-1.step/hg7544mk-1.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).