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MD3156E33QA3
Public Made by Adomby adom
Shanghai Mingda Microelectronics DC-DC Converters, SOT-23-3L. 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
markdownMD3156E33QA3
Shanghai Mingda Microelectronics · DC-DC Converters · SOT-23-3L
MD3156E33QA3 from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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 Connection. It should be connected as close as possible to the output capacitor avoiding the high current switch paths. |
| 2 | SW | output | To connect inductor to VIN. |
| 3 | OUT | power_out | Output voltage pin, with 10μF ceramic capacitor closely connected to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 1.1 | 5 | V | 4 | ||
| Startup Voltage | VSTART | 1.1 | V | IOUT=1mA | 4 | ||
| Hold Voltage | VHOLD | 0.5 | 0.7 | V | IOUT=50mA | 4 | |
| Output Voltage Range | VOUT | 1.8 | 3.6 | V | 4 | ||
| Output Voltage accuracy | 2 | % | IOUT=0mA | 4 | |||
| Line regulation | 0.1 | 0.2 | %/V | IOUT=50mA | 4 | ||
| Load regulation | 1 | 2 | % | IOUT=0~300mA | 4 | ||
| Switching Frequency | FOSC | 0.7 | 1 | 1.4 | MHz | VOUT=0.95*VO, No inductor | 4 |
| Max Duty cycle | 85 | 90 | 95 | % | VOUT=0.95*VO, No inductor | 4 | |
| Quiescent Current at VOUT | IQ | 5 | 8 | 15 | μA | VOUT=1.05*VO | 4 |
| Supply current at VIN | 20 | μA | IOUT=0mA | 4 | |||
| Efficiency | 85 | % | IOUT=100mA | 4 | |||
| PMOS Rdson | RdsonP | 400 | 600 | mohm | ISW=100mA | 4 | |
| NMOS Rdson | RdsonN | 200 | 300 | mohm | ISW=100mA | 4 | |
| SW Leakage Current | ISWLK | 1 | μA | VOUT=3.6V, VSW=0 or 5.2V | 4 | ||
| SW Voltage | VSW | -0.3 | 6 | V | 3 | ||
| Output Voltage | VOUT | -0.3 | 6 | V | 3 | ||
| Enable Voltage | VEN | -0.3 | 6 | V | 3 | ||
| Power Dissipation SOT23-3L | PD | 500 | mW | 3 | |||
| Thermal Resistance SOT23-3L | RθJB | 180 | ℃/W | Mounted on JEDEC standard 4layer (2s2p) PCB test board | 3 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| ESD Protection HBM | ESD HBM | 8000 | V | 3 | |||
| Lead Temperature | 260 | ℃ | 10 S | 3 |
CAD (KiCad official)
- Symbol:
MD3156E33QA3 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
md3156e33qa3-etched.step/md3156e33qa3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md3156e33qa3.step/md3156e33qa3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256
ac12d36d083b72b9, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).