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MP4255 4-36V, 3A, 250kHz Buck Converter QFN-21
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pMPS MP4255 — buck converter, 4-36V input, 3A output, 250 kHz, QFN-21./p
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MP4255 4-36V, 3A, 250kHz Buck Converter QFN-21
MPS MP4255 is a buck converter that accepts 4 V to 36 V input, delivers 3 A, switches at 250 kHz, supplied in a QFN-21 package.
Key Specifications
| Part Number | MP4255 |
| Input Voltage | 4 V to 36 V |
| Output Voltage | 1 V to 36 V |
| Output Current | 3 A |
| Switching Frequency | 250 kHz |
| Topology | Buck Converter |
| Package | QFN-21 |
| Ordering Codes | MP4255 |
Features
- Dual 3A or Shared 6A Buck Converter
- Supports USB PD 3.1
- Wide 4V to 36V Operating Input Voltage (VIN) Range
- 1V to 36V Output Voltage (VOUT) Range
- 0.1V to 1.63V Reference Voltage (VREF) Range with 0.8mV Steps
- Selectable Switching Frequency (fSW) (250kHz, 420kHz, 1.1MHz, or 2.1MHz)
- Frequency Spread Spectrum (FSS)
- Low-Dropout (LDO) Mode
- Line Drop Compensation
- Accurate, Adjustable Output Current Limit (IOUT_LIMIT) with 50mA/Step via the Digital Interface
Applications
- USB Power Delivery (PD)
- USB Dedicated Charging Ports (DCP)
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-21 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP4255?
4–36 V input and 3 A output.
What switching frequency does the MP4255 run at?
250 kHz.
Which package is the MP4255 available in?
QFN-21.
Shenzhen Gaorunxin Technology Co., Ltd
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