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MD7550

Public Made by Adom

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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.

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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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7550.step / md7550.glb are 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, 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