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MP5408 6-36V, 6A Step-Down Converter QFN-26
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pMPS MP5408 — Step-Down Converter, 6-36V input, 6 A output, QFN-26./p
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MP5408 6-36V, 6A Step-Down Converter QFN-26
The MPS MP5408 is a Step-Down Converter. It operates from a 6 V to 36 V input and is rated for 6 A. It is supplied in a QFN-26 package.
The MP5408 integrates a monolithic, step- down, switch-mode converter with two USB current-limit switches and charging port identification circuitry for each port.
Key Specifications
| Part Number | MP5408 |
| Function | Step-Down Converter |
| Input Voltage | 6 V to 36 V |
| Current Rating | 6 A |
| Package | QFN-26 |
| Ordering Codes | MP5408 |
Features
- Wide 6V to 36V Operating Input Voltage Range
- Selectable Output Voltage: 5.1V, 5.17V, and 5.3V
- 90mV Line Drop Compensation
- Accurate USB1/USB2 Output Current Limit
- 18mΩ/15mΩ Low RDS(ON) Internal Buck Power MOSFETs
- 13mΩ/13mΩ Low RDS(ON) Internal USB1/USB2 Power MOSFETs
- Frequency Adjustable (235kHz to 2.2MHz)
- Forced Continuous Conduction Mode (CCM) Operation
- Hiccup Current Limit for both Buck and USB
- Supports DCP Schemes for BC1.2, Divider Mode, and 1.2V/1.2V Mode
Typical Application Circuit
Applications
- USB Dedicated Charging Ports (DCP)
- USB Type-C 5V @ 3A DFP
- Automotive Cigarette Lighter Adapters
Design Notes
- Rail sequencing order and delay are part of the SoC power-up contract; a wrong order latches the processor even though every rail is in spec.
- In multiphase designs, current balance depends on the loop matching between phases, so keep the layout symmetric.
- Digital interfaces (PMBus, I²C) need pull-ups to the correct rail and a defined state during power-up.
- Thermal design is a system problem here: the PMIC sits next to the load it feeds, so budget the shared copper, not the package alone.
Common Questions
What input voltage does the MP5408 support?
6 V to 36 V. The rated output is 6 A.
Which package and ordering codes apply to the MP5408?
QFN-26; order codes include MP5408.
What are the defining features of the MP5408?
Wide 6V to 36V Operating Input Voltage Range Selectable Output Voltage: 5.1V, 5.17V, and 5.3V
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