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MD7550H

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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MD7550H

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3

MD7550H 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 terminal of the regulator, which the datasheet specifies as the common reference for the output and the short-circuit limit (VOUT to GND).
2 VDD power_in Power input terminal, with the input voltage rated at a maximum of 30V and the output held in regulation across the input range.
3 VOUT power_out Regulated output terminal, which must not be driven more than 0.3V above VIN per the datasheet, and which requires an output capacitor of at least 2.2uF (tantalum recommended) 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 4.85 5 5.15 V VIN= 7V, IOUT=10mA 3
Output current IOUT 100 120 mA VIN= 7V 3
Input-output voltage difference Vdrop 5 mV IOUT=1mA 3
Input-output voltage difference Vdrop 60 mV IOUT=10mA 3
Input stability ΔVOUT/(ΔVIN·VOUT) 0.05 0.2 %/V 6V≤VIN≤30V, IOUT=1mA 3
Load regulation ΔVOUT2 60 100 mV VIN=7V, 1.0mA≤IOUT≤100mA 3
Output voltage temperature coefficient ΔVOUT/(ΔTa·VOUT) 50 100 ppm/℃ VIN=7V, IOUT=10mA, -40℃≤Ta≤85℃ 3
Quiescent current ISS 1.2 5 uA VIN=30V, no load 3
Input voltage Vmax 30 V 3
Output short-circuit current Ishort 180 mA Vout=0V 3
Overvoltage protection OVP 37 V IOUT=1mA 3
Input voltage VIN 30 V 2
Allowable power dissipation PD 500 mW SOT_89 package 2
Operating ambient temperature range Topr -40 85 ℃ 2
Storage ambient temperature range Tstg -40 125 ℃ 2
Input capacitor CIN 1 µF Input capacitor CIN 4
Output capacitor CL 2.2 µF Tantalum capacitor 4
Output capacitor CL 10 µF Aluminum electrolytic capacitor 4

CAD (KiCad official)

  • Symbol: MD7550H
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md7550h-etched.step / md7550h-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7550h.step / md7550h.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (11 pp, sha256 6ece13130c125249, retrieved 2026-10-27, 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 off (skipped (clean text read)), 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