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MPQ2143H 2.5-5.5V, 3A, 2MHz Step-Down Converter QFN-10
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pMPS MPQ2143H — step-down converter, 2.5-5.5V input, 3A output, 2 MHz, QFN-10./p
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MPQ2143H 2.5-5.5V, 3A, 2MHz Step-Down Converter QFN-10
MPS MPQ2143H is a step-down converter that accepts 2.5 V to 5.5 V input, delivers 3 A, switches at 2 MHz, supplied in a QFN-10 package.
Key Specifications
| Part Number | MPQ2143H |
| Input Voltage | 2.5 V to 5.5 V |
| Output Current | 3 A |
| Switching Frequency | 2 MHz |
| Topology | Step-Down Converter |
| Package | QFN-10 |
| Ordering Codes | MPQ2143H |
Features
- Wide 2.5V to 5.5V Operating Input Range
- Output Voltage as Low as 0.6V
- 100% Duty Cycle in Dropout
- Up to 3A Output Current
- 80mΩ and 40mΩ Internal Power MOSFET Switches
- Default 2.0MHz Switching Frequency
- EN and Power-Good for Power Sequencing
- Cycle-by-Cycle Over-Current Protection
- Auto Discharge at Power Off
- Short-Circuit Protect with Hiccup Mode
Applications
- Low Voltage I/O System Power
- Handheld/Battery-powered Systems
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 QFN-10 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MPQ2143H?
2.5–5.5 V input and 3 A output.
What switching frequency does the MPQ2143H run at?
2 MHz.
Which package is the MPQ2143H available in?
QFN-10.
Shenzhen Gaorunxin Technology Co., Ltd
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