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MD8355A

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

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Symbol & Footprint

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Datasheet

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Contents

README

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MD8355A

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

MD8355A from Shanghai Mingda Microelectronics, in a SOT-89-3. 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 83XXA-pinout SOT89-3 version, which is the reference for VOUT and for the 1.5uA-class quiescent GND current.
2 VIN power_in Regulator input supply, operating range 2.2V to 40V (absolute maximum -0.3 to 45V), with a recommended input capacitor of 1.0uF or more placed close to the IC.
3 VOUT power_out Regulated 5.5V output (±2%) delivering up to 300mA, with a recommended output capacitor of 1.0uF or more, and it must not exceed VIN+0.3V.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3
Category Power Management ICs
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 VOUT(S) 0.98 1 1.02 ×VOUT(S) VIN=VOUT(S)+2V, IOUT=10mA 3
Load Regulation ΔVOUT 50 80 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)>5.3V 3
GND Current IGND 1.5 2.3 3.5 uA no load, VOUT(S)>5.3V 3
Input Voltage VIN 2.2 40 V 3
Maximum Output Current IOUTMAX 300 350 mA 3
Current Limit ILIM 350 550 mA VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) 3
Dropout Voltage VDROP 4 8 mV VOUT(S)=3.3V, IOUT=1mA 3
Dropout Voltage VDROP 1300 1950 mV VOUT(S)=3.3V, IOUT=300mA 3
Line Regulation ΔVOUT/(ΔVIN·VOUT) 0.01 0.02 %/V VOUT(S)+2V≤VIN≤40V, IOUT=1mA 3
Temperature Stability -50 50 ppm/℃ VIN=VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ 3
GND Current IGND 460 uA IOUT=100mA 3
Short Circuit Current ISHORT 65 mA VIN=VOUT(S)+2.0V, VOUT=0V 3
PSRR PSRR 74 dB f=10Hz, VOUT(S)=3.3V 3
PSRR PSRR 63 dB f=100Hz, VOUT(S)=3.3V 3
PSRR PSRR 42 dB f=1kHz, VOUT(S)=3.3V 3
Over Temperature Protection OTP 170 ℃ IOUT=1mA 3
Input Voltage VIN -0.3 45 V Ta=25℃ 2
Power Dissipation SOT89-3 PD 1000 mW SOT89-3 2
Thermal Resistance RθJB 100 ℃/W SOT89-3, JEDEC 4-layer (2s2p) PCB 2
Operating Ambient Temperature Topr -40 85 ℃ 2
Storage Temperature Tstg -40 125 ℃ 2
ESD Protection ESD 1500 V HBM 2

CAD (KiCad official)

  • Symbol: MD8355A
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md8355a-etched.step / md8355a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md8355a.step / md8355a.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256 b90bf74c0495d786, retrieved 2026-10-24, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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