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MD85Q33QC3

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD85Q33QC3

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5L

MD85Q33QC3 from Shanghai Mingda Microelectronics, in a SOT-23-5L. 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.
2 VIN power_in Power input pin; operating input range 2.2V to 40V (absolute maximum 45V).
3 EN input Enable pin; drive high (VENH 1.5V min to 40V) to enable the device, drive low (VENL 0.6V max) for low-current shutdown.
4 NC unconnected No internal connection.
5 VOUT power_out Regulated output voltage pin (3.3V for MD8533Q), up to 300mA, with 1uF or larger output capacitor.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5L
Category Power Supply Chip
Pins 5

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 xVOUT(S) VIN=VOUT(S)+2V, IOUT=1mA; VOUT(S)=3.3V 6
Dropout Voltage VDROP 4 8 mV VEN=VIN, VOUT(S)=3.3V, IOUT=1mA 6
Dropout Voltage VDROP 1200 1800 mV VEN=VIN, VOUT(S)=3.3V, IOUT=300mA 6
Line Regulation 0.01 0.02 %/V VOUT(S)+2V≤VIN≤40V, IOUT=1mA 6
Load Regulation ΔVOUT2 25 50 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V 6
Temperature Stability -50 50 ppm/℃ VIN=VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ 6
GND Current IGND 1 1.5 2.5 uA VEN=VIN, no load, 3.0≤VOUT(S)≤5.3V 6
Shutdown Current ISHUT 0.1 1 uA VIN=40.0V, VEN=0 6
Input Voltage VIN 2.2 40 V 6
Maximum Output Current IOUTMAX 300 mA 6
Current Limit ILIM 350 550 mA VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) 6
EN 'H' Level Voltage VENH 1.5 40 V 6
EN 'L' Level Voltage VENL 0 0.6 V 6
EN 'H' Level Current IENH -0.1 0.1 uA VIN=40V, VEN=VIN 6
EN 'L' Level Current IENL -0.1 0.1 uA VIN=40V, VEN=0 6
Input Voltage (absolute maximum) VIN -0.3 45 V Ta=25℃ 5
Output Voltage (absolute maximum) VOUT -0.3 0.3 V Vss-0.3 ~ VIN+0.3V (max is the +0.3V offset above VIN) 5
Power Dissipation PD 250 mW SOT23-5 5
Operating Ambient Temperature Topr -40 85 ℃ 5
Storage Temperature Tstg -40 125 ℃ 5
ESD Protection HBM ESD 5000 V HBM 5
Thermal Resistance RθJA 180 ℃/W SOT23-5 5
GND Current IGND 420 uA IOUT=100mA 6
Short Circuit Current ISHORT 65 mA VIN=VEN=VOUT(S)+2.0V, VOUT=0V 6
Power Supply Rejection Ratio PSRR 79 dB f=100Hz, IOUT=10mA 6
Power Supply Rejection Ratio PSRR 62 dB f=1kHz, IOUT=10mA 6
Power Supply Rejection Ratio PSRR 48 dB f=10kHz, IOUT=10mA 6
Power Supply Rejection Ratio PSRR 40 dB f=100kHz, IOUT=10mA 6
Over Temperature Protection OTP 170 ℃ IOUT=1mA 6

CAD (KiCad official)

  • Symbol: MD85Q33QC3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md85q33qc3-etched.step / md85q33qc3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md85q33qc3.step / md85q33qc3.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (17 pp, sha256 38727c99a8471351, retrieved 2026-10-23, 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