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MD52E18QA3

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD52E18QA3

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-3L

MD52E18QA3 from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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 pin of the regulator; GND current is 0.6 μA typ (0.9 μA max) at no load.
2 VOUT power_out Regulated output (1.8 V for MD52E18QA3, ±0.03 V) delivering up to 500 mA, with 1.0 μF or larger output capacitor and VOUT not to exceed VIN+0.3 V.
3 VIN power_in Input supply pin, operating range 2.2 V to 7 V (absolute maximum -0.3 to 8 V), with 1.0 μF or larger input capacitor.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-3L
Category Power Supply Chip
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 VOUT(S) -0.03 0.03 V VIN=VOUT(S)+2.0V, IOUT=10mA, VOUT(S)<2.0V (offset from VOUT(S)) 4
Dropout Voltage VDROP 240 mV VEN=VIN, VOUT<3V, IOUT=500mA 4
Line Regulation ΔVOUT/(ΔVIN·VOUT) 0.05 0.1 %/V VOUT(S)+0.5V≤VIN=VEN≤7V, IOUT=10mA 4
Load Regulation ΔVOUT2 50 90 mV VIN=VEN=VOUT(S)+1.0V, 1mA≤IOUT≤500mA 4
Temperature Stability ΔVOUT/(ΔT·VOUT) -50 50 ppm/℃ VIN=VEN=VOUT(S)+1.0V, IOUT=1mA, -40℃≤Ta≤125℃ 4
GND Current IGND 0.6 0.9 μA VEN=VIN, no load 4
GND Current at full load IGND 210 μA VEN=VIN, IOUT=500mA 4
Shutdown Current ISHUT 0.01 0.1 μA VIN=7.0V, VEN=0 4
Input Voltage VIN 2.2 7 V 4
Maximum Output Current IOUTMAX 450 500 mA 4
Current Limit ILIM 750 mA VIN=VEN=VOUT(S)+1.0V, VOUT=0.95×VOUT(S) 4
Short Circuit Current ISHORT 50 mA VIN=VEN=VOUT(S)+1.0V, VOUT=0V 4
COUT Auto Discharge Resistance RDCHG 280 450 640 Ω VEN=0, VOUT=VOUT(S) 4
PSRR 10Hz PSRR 64 dB f=10Hz, IOUT=10mA 4
PSRR 100Hz PSRR 51 dB f=100Hz, IOUT=10mA 4
PSRR 1kHz PSRR 34 dB f=1kHz, IOUT=10mA 4
EN High Level Voltage VENH 1 7 V 4
EN Low Level Voltage VENL 0 0.38 V 4
EN High Level Current IENH -0.1 0.1 μA VIN=7.0V, VEN=VIN 4
EN Low Level Current IENL -0.1 0.1 μA VIN=7.0V, VEN=0 4
Input Voltage (abs max) VIN -0.3 8 V Ta=25℃ 3
Power Dissipation SOT23-3 PD 250 mW SOT23-3 3
Thermal Resistance SOT23-3 RθJB 200 ℃/W SOT23-3, JEDEC 4layer (2s2p) PCB 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
ESD Protection HBM ESD HBM 6000 V 3

CAD (KiCad official)

  • Symbol: MD52E18QA3
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: md52e18qa3-etched.step / md52e18qa3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md52e18qa3.step / md52e18qa3.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 d323bc81a3ded089, retrieved 2026-10-23, 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