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MD53R33

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by Ray

Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

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MD53R33

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

MD53R33 from Shanghai Mingda Microelectronics, in a SOT-23-5. 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 VDD power_in Unregulated supply input. Operating range up to 10 V (abs. max 12 V). Bypass to GND with a 10 µF ceramic capacitor close to the pin.
2 GND power_in Device ground reference for VDD, VOUT, and CE.
3 CE input Chip Enable. Drive HIGH (VCEH ≥ 1.0 V, typ. up to VIN) to enable the regulator output; drive LOW (≤ 0.35 V) to disable and place the part in shutdown. Internal pull-up current ICEH ≈ 0.1 µA (max 1 µA) when VCE = VOUT+1V. Do not leave floating.
4 NC unconnected No internal connection. May be left floating or tied to GND for mechanical stability.
5 VOUT power_out Regulated 3.3 V output (±2%, min 3.234 V / max 3.366 V at VIN = 4.3 V, IOUT = 50 mA). Continuous current up to 500 mA; short-circuit current limit typ. 50 mA / max 70 mA. Requires a 10 µF ceramic output capacitor for stability.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5
Category PMIC
Pins 5

CAD (KiCad official)

  • Symbol: MD53R33
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256 82c82f79d353da1f, retrieved 2026-08-17, 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: 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