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MPQ28261 12-1.2V, 3A, 500kHz Synchronous Step-Down Converter QFN14
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pMPS MPQ28261 — synchronous step-down converter, 12-1.2V input, 3A output, 500 kHz, QFN14./p
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MPQ28261 12-1.2V, 3A, 500kHz Synchronous Step-Down Converter QFN14
MPS MPQ28261 is a synchronous step-down converter that accepts 12 V to 1.2 V input, delivers 3 A, switches at 500 kHz, supplied in a QFN14 package.
Key Specifications
| Part Number | MPQ28261 |
| Input Voltage | 12 V to 1.2 V |
| Output Current | 3 A |
| Switching Frequency | 500 kHz |
| Topology | Synchronous Step-Down Converter |
| Package | QFN14 |
| Ordering Codes | MPQ28261 |
Features
- Wide 4.5V-to-21V Operating Input Range
- 3A Maximum Continuous Output Current
- Integrated 120mΩ High-Side and 20mΩ Low-Side Power MOSFETs
- 1% Reference Voltage Accuracy
- Up to 85% Efficiency (for Drops of 12V to 1.2V)
- Fixed 500kHz Switching Frequency
- External Soft-Start
- PG Output
- OCP and Thermal Shutdown
- Output Adjustable from 0.603V to 18V
Applications
- DSL Modems
- Cable Modems
- Set-Top Boxes
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 QFN14 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MPQ28261?
12–1.2 V input and 3 A output.
What switching frequency does the MPQ28261 run at?
500 kHz.
Which package is the MPQ28261 available in?
QFN14.
Shenzhen Gaorunxin Technology Co., Ltd
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