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MD85A36PA1

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

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MD85A36PA1

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

MD85A36PA1 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 pin; the datasheet specifies it as the ground reference for the regulator.
2 VIN power_in Power input pin; the input voltage range is 2.2V to 40V, with an absolute maximum of 45V (-0.3V to 45V).
3 VOUT power_out Regulated output voltage pin; VOUT must not exceed VIN+0.3V, otherwise reverse current through the parasitic diodes can destroy the IC.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3L
Category Power Management (PMIC)
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 (printed tolerance) VOUT -2 2 % 1
Temperature stability ΔVOUT/(VOUT·ΔT) -50 50 ppm/℃ VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ 4
Dropout voltage (IOUT=1mA) VDROP 4 8 mV VEN=VIN, VOUT(S)=3.3V, IOUT=1mA 4
Dropout voltage (IOUT=300mA) VDROP 1200 1800 mV VEN=VIN, VOUT(S)=3.3V, IOUT=300mA 4
Line regulation ΔVOUT/(VOUT·ΔVIN) 0.01 0.02 ％/V VOUT(S)+2V≤VIN≤40V, IOUT=1mA 4
Load regulation (VOUT(S)≤5.3V row, applies to 3.6V) VOUT2 20 40 mV VIN = VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V 4
GND current, no load (3.0≤VOUT(S)≤5.3V row, applies to 3.6V) IGND 1 1.5 2.5 uA no load, VEN=VIN 4
Shutdown current ISHUT 0.1 1 uA VIN=40.0V, VEN=0 4
Input voltage VIN 2.2 40 V 4
Maximum output current IOUTMAX 300 350 mA 4
Current limit ILIM 350 550 mA VIN= VOUT(S)+2V, VOUT = 0.95×VOUT(S) 4
Short circuit current ISHORT 65 mA VIN=VEN=VOUT(S)+2.0V, VOUT=0V 4
EN high-level voltage VENH 1.5 40 V 4
EN low-level voltage VENL 0 0.6 V 4
EN high-level current IENH -0.1 0.1 uA VIN=40V, VEN=VIN 4
EN low-level current IENL -0.1 0.1 uA VIN=40V, VEN=0 4
Input voltage (absolute maximum) VIN -0.3 45 V Ta=25℃ unless otherwise indicated 3
Power dissipation, SOT89-3 PD 1000 mW Ta=25℃ unless otherwise indicated 3
Thermal resistance junction-to-board, SOT89-3 RθJB 100 ℃/W Mounted on JEDEC standard 4layer (2s2p) PCB test board 3
Operating ambient temperature Topr -40 85 ℃ 3
Storage temperature Tstg -40 125 ℃ 3

CAD (KiCad official)

  • Symbol: MD85A36PA1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: md85a36pa1-etched.step / md85a36pa1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md85a36pa1.step / md85a36pa1.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256 b57d90f008c009b2, retrieved 2026-10-18, 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