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MPM3840 2.8-5.5V, 4A, 1.2MHz Synchronous Step-Down Converter QFN-20
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pMPS MPM3840 — synchronous step-down converter, 2.8-5.5V input, 4A output, 1.2 MHz, QFN-20./p
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MPM3840 2.8-5.5V, 4A, 1.2MHz Synchronous Step-Down Converter QFN-20
MPS MPM3840 is a synchronous step-down converter that accepts 2.8 V to 5.5 V input, delivers 4 A, switches at 1.2 MHz, supplied in a QFN-20 package.
Key Specifications
| Part Number | MPM3840 |
| Input Voltage | 2.8 V to 5.5 V |
| Output Current | 4 A |
| Switching Frequency | 1.2 MHz |
| Topology | Synchronous Step-Down Converter |
| Package | QFN-20 |
| Ordering Codes | MPM3840 |
Features
- >80% Light-Load Efficiency
- Low IQ: 40μA
- Wide 2.8V to 5.5V Operating Input Range
- Output Voltage as Low as 0.6V
- 100% Duty Cycle in Dropout
- 4A Output Current
- 25mΩ and 12mΩ Internal Power MOSFETs
- 1.2MHz Frequency
- External Mode Control
- External Mode Control (PWM.PFM) and Dynamic Analog Voltage
Applications
- Networking/Servers
- Space-Constraint Applications
- Industrial Products
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-20 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MPM3840?
2.8–5.5 V input and 4 A output.
What switching frequency does the MPM3840 run at?
1.2 MHz.
Which package is the MPM3840 available in?
QFN-20.
Shenzhen Gaorunxin Technology Co., Ltd
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