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MD52A33PA1
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), 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
markdownMD52A33PA1
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3
MD52A33PA1 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; the internal COUT auto-discharge switch connects between VOUT and GND. |
| 2 | VIN | power_in | Input supply pin, operating range 2.2V to 7V (absolute maximum -0.3 to 8V), with a recommended input capacitor of 1.0µF or more. |
| 3 | VOUT | power_out | Regulated 3.3V output delivering up to 500mA, with a recommended output capacitor of 1.0µF or more. |
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 |
|---|---|---|---|---|---|---|---|
| Dropout Voltage | VDROP | 230 | mV | VEN=VIN, VOUT≥3V, IOUT=500mA | 4 | ||
| Line Regulation | ΔVOUT/(ΔVIN·VOUT) | 0.05 | 0.1 | %/V | VOUT(S)+0.5V≤VIN=VEN≤7V, IOUT=10mA | 4 | |
| Load Regulation | ΔVOUT2 | 50 | 90 | mV | VIN=VEN=VOUT(S)+1.0V, 1mA≤IOUT≤500mA | 4 | |
| Temperature Stability | ΔVOUT/(ΔT·VOUT) | -50 | 50 | ppm/℃ | VIN=VEN=VOUT(S)+1.0V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 | |
| GND Current, no load | IGND | 0.6 | 0.9 | μA | VEN=VIN, no load | 4 | |
| GND Current, 500mA | IGND | 210 | μA | VEN=VIN, IOUT=500mA | 4 | ||
| Shutdown Current | ISHUT | 0.01 | 0.1 | μA | VIN=7.0V, VEN=0 | 4 | |
| Input Voltage | VIN | 2.2 | 7 | V | 4 | ||
| Maximum Output Current | IOUTMAX | 450 | 500 | mA | 4 | ||
| Current Limit | ILIM | 750 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT=0.95×VOUT(S) | 4 | ||
| Short Circuit Current | ISHORT | 50 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT=0V | 4 | ||
| COUT Auto Discharge Resistance | RDCHG | 280 | 450 | 640 | Ω | VEN=0, VOUT=VOUT(S) | 4 |
| PSRR 10Hz | PSRR | 64 | dB | f=10Hz, IOUT=10mA | 4 | ||
| PSRR 100Hz | PSRR | 51 | dB | f=100Hz, IOUT=10mA | 4 | ||
| PSRR 1kHz | PSRR | 34 | dB | f=1kHz, IOUT=10mA | 4 | ||
| EN High Level Voltage | VENH | 1 | 7 | V | 4 | ||
| EN Low Level Voltage | VENL | 0 | 0.38 | V | 4 | ||
| EN High Level Current | IENH | -0.1 | 0.1 | μA | VIN=7.0V, VEN=VIN | 4 | |
| EN Low Level Current | IENL | -0.1 | 0.1 | μA | VIN=7.0V, VEN=0 | 4 | |
| Input Voltage (absolute maximum) | VIN | -0.3 | 8 | V | Ta=25℃ | 3 | |
| Power Dissipation SOT89-3 | PD | 1000 | mW | SOT89-3, Ta=25℃ | 3 | ||
| Thermal Resistance Junction-to-Board SOT89-3 | RθJB | 100 | ℃/W | SOT89-3, mounted on JEDEC 4layer (2s2p) PCB | 3 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| ESD Protection HBM | ESD HBM | 6000 | V | 3 |
CAD (KiCad official)
- Symbol:
MD52A33PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
md52a33pa1-etched.step/md52a33pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md52a33pa1.step/md52a33pa1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (14 pp, sha256
4168b8cf3e52f15f, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).