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MPQ4431 3.3-36V, 1A, 350kHz Step-Down Converter QFN-16
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pMPS MPQ4431 — step-down converter, 3.3-36V input, 1A output, 350 kHz, QFN-16./p
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MPQ4431 3.3-36V, 1A, 350kHz Step-Down Converter QFN-16
MPS MPQ4431 is a step-down converter that accepts 3.3 V to 36 V input, delivers 1 A, switches at 350 kHz, supplied in a QFN-16 package.
Key Specifications
| Part Number | MPQ4431 |
| Input Voltage | 3.3 V to 36 V |
| Output Current | 1 A |
| Switching Frequency | 350 kHz |
| Topology | Step-Down Converter |
| Package | QFN-16 |
| Ordering Codes | MPQ4431 |
Features
- Wide 3.3V to 36V Operating Input Range
- 1A Continuous Output Current
- 1μA Low Shutdown Mode Current
- 10μA Sleep Mode Quiescent Current
- Internal 90mΩ High-Side and 80mΩ Low- Side MOSFETs
- 350kHz to 2.5MHz Programmable Switching Frequency
- Fixed Output Options: 3.3V, 3.8V, 5V
- Synchronize to External Clock
- Selectable In-Phase or 180° Out-of-Phase
- Power Good (PG) Indicator
Applications
- Automotive 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.
- AEC-Q100 qualification suits this part to automotive rails.
- Package QFN-16 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MPQ4431?
3.3–36 V input and 1 A output.
What switching frequency does the MPQ4431 run at?
350 kHz, programmable.
Which package is the MPQ4431 available in?
QFN-16.
Shenzhen Gaorunxin Technology Co., Ltd
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