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MD7144H

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

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MD7144H

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

MD7144H 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 (接地端) of the 4.4 V regulator; the datasheet gives no separate electrical limit for this pin.
2 VDD power_in Power input that supplies the regulator, with an absolute maximum input voltage of 32 V; the regulator keeps the output in regulation over the input range and has overvoltage protection.
3 VOUT power_out Regulated 4.4 V output (4.268 V to 4.532 V at VIN=6.4 V, IOUT=10 mA) that must not be driven above VIN+0.3 V, with short-circuit current limited to 30 mA and a 2.2 µF or larger tantalum (or 10 µF or larger aluminum electrolytic) output capacitor required.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3
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 tolerance (product table: 精度±3%) VOUT -3 3 % 1
Output voltage VOUT 4.268 4.4 4.532 V VIN= 6.4V，IOUT=10mA 4
Output current IOUT 25 30 mA VIN= 6.4V 4
Input-output voltage difference (dropout) Vdrop 40 60 mV IOUT=1mA 4
Input stability ΔVOUT/ΔVIN·VOUT 0.05 0.2 ％/V 5.4V≤VIN≤32V, IOUT=1mA 4
Load stability ΔVOUT2 60 100 mV VIN=6.4V, 1.0mA≤IOUT≤30mA 4
Output voltage temperature coefficient ΔVOUT/ΔTa·VOUT -100 50 100 ppm/℃ VIN=6.4V，IOUT=10mA, -40℃≤Ta≤85℃ 4
Quiescent current (no load) ISS 1.2 5 uA VIN=32V, no load 4
Input voltage (maximum regulated input) Vmax 32 V 4
Output short-circuit current Ishort 30 mA Vout=0V 4
Input voltage (absolute maximum) VIN 32 V 2
Power dissipation, SOT-89 PD 500 mW SOT_89 package; Ta=25℃ (table header) 2
Operating ambient temperature range Topr -40 85 ℃ 2
Storage ambient temperature range Tstg -40 125 ℃ 2

CAD (KiCad official)

  • Symbol: MD7144H
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md7144h-etched.step / md7144h-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7144h.step / md7144h.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256 0de18d8f469d00d1, retrieved 2026-10-18, 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