component
MD7550
Public Made by Adomby adom
Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 16d ago |
| viewers | 16d ago |
| md7550-etched.glb | 16d ago |
| md7550-etched.step | 16d ago |
| md7550-hero.glb | 16d ago |
| md7550-hero.overlay.json | 16d ago |
| md7550.glb | 16d ago |
| md7550.kicad_mod | 16d ago |
| md7550.kicad_sym | 16d ago |
| md7550.lbr | 16d ago |
| md7550.step | 16d ago |
| package.json | 16d ago |
| page.json | 16d ago |
| README.md | 16d ago |
MD7550
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
MD7550 from Shanghai Mingda Microelectronics, 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 terminal; the datasheet specifies no separate limit for this pin. |
| 2 | VDD | power_in | Power input terminal; the input voltage Vmax is 18 V, and the output stays regulated up to this maximum. |
| 3 | VOUT | power_out | Regulated output terminal; the absolute maximum output voltage is Vss-0.3 V to VIN+0.3 V, and VOUT must not exceed VIN+0.3 V to avoid reverse current damage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| 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 accuracy (MD7550 product table) | -3 | 3 | % | ±3% printed for MD7550 (5.0V) | 1 | ||
| Output voltage | VOUT | 4.85 | 5 | 5.15 | V | VIN= 7V，IOUT=10mA | 4 |
| Output current | IOUT | 120 | mA | VIN= 7V | 4 | ||
| Input-output voltage difference | Vdrop | 30 | mV | IOUT=1mA | 4 | ||
| Input stability | ΔVOUT/ΔVIN·VOUT | 0.05 | 0.2 | ％/V | 6V≤VIN≤18V, IOUT=1mA | 4 | |
| Load stability | ΔVOUT2 | 60 | 100 | mV | VIN=7V, 1.0mA≤IOUT≤120mA | 4 | |
| Output voltage temperature coefficient | ΔVOUT/ΔTa·VOUT | 50 | 100 | ppm/℃ | VIN=7V，IOUT=10mA, -40℃≤Ta≤85℃ | 4 | |
| Quiescent current | ISS | 1.2 | 5 | uA | VIN=18V, no load | 4 | |
| Input voltage (regulation range) | Vmax | 18 | V | 4 | |||
| Output short-circuit current | Ishort | 100 | mA | Vout=0V | 4 | ||
| Input voltage | VIN | 18 | V | 2 | |||
| Power dissipation (SOT-89) | PD | 500 | mW | SOT-89; Ta=25℃ unless otherwise noted | 2 | ||
| Operating ambient temperature range | Topr | -40 | 85 | ℃ | 2 | ||
| Storage ambient temperature range | Tstg | -40 | 125 | ℃ | 2 | ||
| Input capacitor (CIN) | CIN | 1 | µF | Input capacitor, 1.0 µF or more | 5 | ||
| Output capacitor (CL), tantalum | CL | 2.2 | µF | Tantalum capacitor | 5 | ||
| Output capacitor (CL), aluminum electrolytic | CL | 10 | µF | Aluminum electrolytic capacitor | 5 | ||
| Output capacitor ESR range | ESR | 0.5 | 5 | Ω | Approximate appropriate ESR range for stable operation | 7 |
CAD (KiCad official)
- Symbol:
MD7550 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
md7550-etched.step/md7550-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md7550.step/md7550.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256
0c39c56cb5c0ce7d, 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).