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MP4459 3.8-36V, 1.5A, 4MHz Step-Down Converter QFN10
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pMPS MP4459 — step-down converter, 3.8-36V input, 1.5A output, 4 MHz, QFN10./p
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MP4459 3.8-36V, 1.5A, 4MHz Step-Down Converter QFN10
MPS MP4459 is a step-down converter that accepts 3.8 V to 36 V input, delivers 1.5 A, switches at 4 MHz, supplied in a QFN10 package.
Key Specifications
| Part Number | MP4459 |
| Input Voltage | 3.8 V to 36 V |
| Output Current | 1.5 A |
| Switching Frequency | 4 MHz |
| Quiescent Current | 120 uA |
| Topology | Step-Down Converter |
| Package | QFN10 |
| Ordering Codes | MP4459 |
Features
- 120μA Quiescent Current
- Wide 3.8V to 36V Operating Input Range
- 150mΩ Internal Power MOSFET
- Up to 4MHz Programmable Switching Frequency
- Ceramic Capacitor Stable
- Internal Soft-Start
- Precision Current Limit without a Current Sensing Resistor
- Up to 95% Efficiency
- Output Adjustable from 0.8V to 30V
- Available in 10-Pin 3x3mm TQFN Package
Applications
- High Voltage Power Conversion
- Automotive Systems
- Industrial Power Systems
- Distributed Power 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 QFN10 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP4459?
3.8–36 V input and 1.5 A output.
What switching frequency does the MP4459 run at?
4 MHz, programmable.
Which package is the MP4459 available in?
QFN10.
Shenzhen Gaorunxin Technology Co., Ltd
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