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MD7671E50UB2

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by Ray

Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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MD7671E50UB2

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-4

MD7671E50UB2 from Shanghai Mingda Microelectronics, in a TO-252-4. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN input Enable pin. Active-high logic: >=1.6V turns the regulator on, <=0.4V shuts it down (Ishut ~10nA). Shutdown pin current typ 0.1uA (max 0.5uA).
2 VIN power_in Power input, 2-6V operating range (abs max -0.3 to 7V). Must be closely decoupled to GND with a 4.7uF or larger ceramic capacitor (X5R/X7R).
3 GND power_in Ground / heat slug. Connect the bottom-side pad to a large ground plane for thermal conductivity; θJA = 60 °C/W for the TO252-4L package.
4 VOUT power_out Regulator output pin. Default fixed 5V (±2%) at up to 1A continuous. Dropout ~150mV @ Iout=1A, Vout=5V. Requires a 4.7uF (or larger) low-ESR ceramic output capacitor.
5 ADJ input Adjustable/feedback pin. Tie to GND to use the internal divider for the default 5V output, or drive with an external R1/R2 divider to program VOUT = VREF*(1+R1/R2) where VREF = 0.7V nominal. ADJ pin current ~10nA; threshold ~0.1V.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package TO-252-4
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • MD7671E50UB2
  • MD7671E50UB2A50SF4
  • MD7671E50UB2B50SF4
  • MD7671E50UB2E50QC3
  • MD7671E50UB2E33PA1
  • MD7671E50UB2A33PA1

CAD (KiCad official)

  • Symbol: MD7671E50UB2
  • Footprint: Package_TO_SOT_SMD:TO-252-4
  • 3D model: TO-252-4 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (14 pp, sha256 5934758f3aa04fb8, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF