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MD5333-1

Public Made by Adom

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

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MD5333-1

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

MD5333-1 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; connect the input and output capacitors close to this pin and VOUT.
2 VIN power_in Input supply pin, rated up to 10V operating (absolute maximum 12V), with at least 1.0 µF input capacitor; the package tab is also marked 2 (VIN).
3 VOUT power_out Regulated 3.3V output (±2%) for MD5333-1, up to 500mA with current limit about 1A, requiring an output capacitor of 2.2 µF or more.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3
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 current (limited, VOUT drops to 98%) IOUT 500 mA VIN=VOUT+1V 3
Input-output voltage differential, VOUT=3.3V VDROP 500 1000 mV IOUT=500mA, VOUT=3.3V 3
Input stability ΔVOUT1/ΔVIN*VOUT 0.05 0.2 %/V VOUT+1V≤VIN≤10V, IOUT=10mA 3
Load regulation ΔVOUT2 20 40 mV VIN=VOUT+1V, 1mA≤IOUT≤100mA 3
Output voltage temperature coefficient ΔVOUT/ΔTa*VOUT(S) -100 50 100 ppm/℃ VIN=VOUT+1V, IOUT=1mA, -40℃≤Ta≤125℃ 3
Quiescent (supply) current, no load ISS1 1.2 2.5 uA VIN=10V, no load 3
Input voltage VIN 10 V 3
Current limit ILIM 1 A VIN=VOUT+1V 3
Power supply ripple rejection ratio (100Hz) PSRR 44 dB f=100Hz, IOUT=10mA 3
Power supply ripple rejection ratio (1kHz) PSRR 23 dB f=1kHz, IOUT=10mA 3
Output voltage (nominal for MD5333-1) VOUT(S) 3.3 V VIN=VOUT+1V, IOUT=50mA; min = VOUT(S)×0.98 and max = VOUT(S)×1.02 as printed (formulas, not computed) 3
Input voltage VIN 12 V 2
Power dissipation, SOT-89 PD 1000 mW SOT-89 2
Thermal resistance, junction-to-board, SOT-89 RθJB 100 ℃/W SOT-89, JEDEC 4-layer (2s2p) PCB, note (1) 2
Operating ambient temperature range TOPR -40 85 ℃ 2
Storage ambient temperature range TSTG -40 125 ℃ 2
Input capacitor (CIN) CIN 1 µF Input capacitor of use condition 8
Output capacitor (CL), tantalum CL 2.2 µF Tantalum capacitor 8
Output capacitor (CL), aluminum electrolytic CL 10 µF Aluminum electrolytic capacitor 8

CAD (KiCad official)

  • Symbol: MD5333-1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md5333-1-etched.step / md5333-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md5333-1.step / md5333-1.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256 248fdd6b5737ce18, retrieved 2026-10-18, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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