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MD52A37PA1

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD52A37PA1

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3L

MD52A37PA1 from Shanghai Mingda Microelectronics, in a SOT-89-3L. 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 reference pin of the regulator; the datasheet pin diagram places GND at position 1 for the SOT89-3L(A_Type) package.
2 VIN power_in Input supply pin; input voltage range is 2.2V to 7.0V, and the absolute maximum VIN rating is -0.3 to 8 V.
3 VOUT power_out Regulated output pin; the datasheet states VOUT must not exceed VIN+0.3V, otherwise the IC may be destroyed by reverse current.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3L
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 accuracy VOUT -2 2 % 2
Line regulation ΔVOUT/ΔVIN 0.05 0.1 ％/V VOUT(S)+0.5V≤VIN=VEN≤7V, IOUT=10mA 4
Load regulation VOUT 50 90 mV VIN=VEN=VOUT(S)+1.0V, 1mA≤IOUT≤500mA 4
Temperature stability ΔVOUT/ΔT -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 500 mA 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
Power supply rejection ratio at 10Hz PSRR 64 dB f=10Hz, IOUT=10mA 4
Power supply rejection ratio at 100Hz PSRR 51 dB f=100Hz, IOUT=10mA 4
Power supply rejection ratio at 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 absolute maximum VIN -0.3 8 V Ta=25℃ 3
Power dissipation SOT89-3 PD 1000 mW SOT89-3 3
Thermal resistance junction to board SOT89-3 RθJB 100 ℃/W SOT89-3, mounted on JEDEC standard 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
Nominal output voltage VOUT(S) 3.7 V MD52A37PA1 (3.7V variant) per product selection 3

CAD (KiCad official)

  • Symbol: MD52A37PA1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: md52a37pa1-etched.step / md52a37pa1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md52a37pa1.step / md52a37pa1.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 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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