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MP9181 4.5-20V, 3A Synchronous Step-down Converter QFN12
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pMPS MP9181 — synchronous step-down converter, 4.5-20V input, 3A output, QFN12./p
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MP9181 4.5-20V, 3A Synchronous Step-down Converter QFN12
MPS MP9181 is a synchronous step-down converter that accepts 4.5 V to 20 V input, delivers 3 A, supplied in a QFN12 package.
Key Specifications
| Part Number | MP9181 |
| Input Voltage | 4.5 V to 20 V |
| Output Current | 3 A |
| Topology | Synchronous Step-down Converter |
| Package | QFN12 |
| Ordering Codes | MP9181 |
Features
- Compatible with Intel Thunderbolt Specs
- Wide 4.5V to 20V Operating Input Range
- 3A Output Current
- +/-1% VFB Voltage Tolerance
- Low RDS(ON) Internal Power MOSFETs
- Proprietary Switching Loss Reduction Technique
- Up to 95% Peak Efficiency
- High Light Load Efficiency
- Soft Start-up/Shutdown
- Programmable Switching Frequency
Applications
- Networking/Communication Systems
- System I/O Power
Design Notes
- The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
- Keep the input loop short — high di/dt at the switch node sets conducted EMI.
- Power switches are integrated, so the thermal path is the PCB copper under the pad.
- Package QFN12 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP9181?
4.5–20 V input and 3 A output.
Which package is the MP9181 available in?
QFN12.
Shenzhen Gaorunxin Technology Co., Ltd
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