component
MD5333-1
Public Made by Adomby adom
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMD5333-1
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md5333-1.step/md5333-1.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).