component
MD7544
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3. 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
markdownMD7544
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3
MD7544 from Shanghai Mingda Microelectronics, in a SOT-89-3. 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. |
| 2 | VDD | power_in | Power supply input pin; input voltage withstands up to 18V (absolute maximum VIN 18V) and VOUT must not exceed VIN+0.3V. |
| 3 | VOUT | power_out | Regulated 4.4V (±3%) output pin, up to 120mA with short-circuit current limited to about 100mA, requiring a 2.2µF or larger output capacitor to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| 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 | 4.268 | 4.4 | 4.532 | V | VIN=6.4V, IOUT=10mA | 3 |
| Output current | IOUT | 120 | mA | VIN=6.4V | 3 | ||
| Dropout voltage | Vdrop | 5 | 35 | mV | IOUT=1mA / IOUT=10mA | 3 | |
| Line regulation | ΔVOUT/ΔVIN·VOUT | 0.05 | 0.2 | %/V | 5.4V≤VIN≤18V, IOUT=1mA | 3 | |
| Load regulation | ΔVOUT2 | 60 | 100 | mV | VIN=6.4V, 1.0mA≤IOUT≤120mA | 3 | |
| Output voltage temperature coefficient | ΔVOUT/ΔTa·VOUT | 50 | 100 | ppm/℃ | VIN=6.4V, IOUT=10mA, -40℃≤Ta≤85℃ | 3 | |
| Quiescent current | ISS | 1.2 | 5 | uA | VIN=18V, no load | 3 | |
| Input voltage | Vmax | 18 | V | 3 | |||
| Output short-circuit current | Ishort | 100 | mA | Vout=0V | 3 | ||
| Input voltage | VIN | 18 | V | Ta=25℃ | 2 | ||
| Power dissipation SOT-89 | PD | 500 | mW | SOT-89 | 2 | ||
| Operating ambient temperature | Topr | -40 | 85 | ℃ | 2 | ||
| Storage temperature | Tstg | -40 | 125 | ℃ | 2 | ||
| Input capacitor | CIN | 1 | µF | 1.0 µF or more | 5 | ||
| Output capacitor | CL | 2.2 | µF | 2.2 µF or more (tantalum); 10.0 µF or more (aluminum electrolytic) | 5 |
CAD (KiCad official)
- Symbol:
MD7544 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
md7544-etched.step/md7544-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md7544.step/md7544.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256
2834e2700c8ad15c, retrieved 2026-10-26, 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-sonnet-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).