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MD5127

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, UDFN-4-EP(1x1). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD5127

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · UDFN-4-EP(1x1)

MD5127 from Shanghai Mingda Microelectronics, in a UDFN-4-EP(1x1). 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 VOUT power_out Regulated output pin driven by the P-channel pass transistor, with a 0.1µF or larger output capacitor, a maximum of 300mA output current, and a voltage that must not exceed VIN+0.3V.
2 GND power_in Ground pin, which also returns the internal COUT auto-discharge switch from VOUT when CE is low.
3 CE input Active-high chip enable and ON/OFF input, where VCEH is 1.0V to 6.0V for on and VCEL is 0V to 0.38V for off with output discharge.
4 VIN power_in Power supply input of 1.5V to 7V (absolute maximum 8.0V), with a 1.0µF or larger input capacitor placed close to the IC.
5 EP passive Exposed thermal pad shown on the package drawing; the datasheet does not state its electrical connection.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package UDFN-4-EP(1x1)
Category Power Management (PMIC)
Pins 5

CAD (KiCad official)

  • Symbol: MD5127
  • Footprint: Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm
  • 3D model: UDFN-4-EP(1x1) (KiCad packages3D, STEP)
  • 3D model files: md5127-etched.step / md5127-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md5127.step / md5127.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (14 pp, sha256 b9016866a24d108a, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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