component

MD52E21QA3

Public Unreviewed

by Ray

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

componentpmicmd52e21qa3
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

MD52E21QA3

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L

MD52E21QA3 from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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 GND power_in Device ground reference. Connect to system ground plane; place input and output ceramic capacitors as close as possible to this pin.
2 VOUT power_out Regulated 2.1V output (VOUT(S)=2.1V, tolerance +/-2%). Delivers up to 500mA (typ), current-limited at ~750mA with foldback to ~50mA under short circuit. Requires >=1.0uF low-ESR ceramic output capacitor for stability.
3 VIN power_in Unregulated input supply, 2.2V to 7.0V operating (absolute max 8V). Requires >=1.0uF ceramic input capacitor placed close to the pin. VOUT must not exceed VIN+0.3V to avoid parasitic-diode reverse conduction.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-3L
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • MD52E21QA3
  • MD52E21QA3QC3
  • MD52E21QA3PA1
  • MD52E21QA3WB6

CAD (KiCad official)

  • Symbol: MD52E21QA3
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (14 pp, sha256 11f4b5d8b0feb201, 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