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MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14
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pMPS MP38874 — Step-Down Converter, 4.5-21V input, 8 A output, QFN14./p
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MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14
The MPS MP38874 is a Step-Down Converter. It operates from a 4.5 V to 21 V input, is rated for 8 A and switches at 600 KHz. It is supplied in a QFN14 package.
The MP38874 is a monolithic step-down switch mode converter with a built in internal power MOSFET.
Key Specifications
| Part Number | MP38874 |
| Function | Step-Down Converter |
| Input Voltage | 4.5 V to 21 V |
| Current Rating | 8 A |
| Switching Frequency | 600 KHz |
| Peak Efficiency | 95% |
| Package | QFN14 |
| Ordering Codes | MP38874 |
Features
- Wide 4.5V to 21V Operating Input Range
- 8A Continuous Output Current
- 42mΩ Internal Power MOSFET Switch
- Power Good Indicator
- Synchronous Gate Driver Delivers up to 95% Efficiency
- Fixed 600KHz Frequency
- Synchronizable to >1MHz External Clock
- Cycle-by-Cycle Over Current Protection
- Thermal Shutdown
- Output Adjustable from 0.8V to 15V
Typical Application Circuit
Applications
- Point of Load Regulator in Distributed Power System
- Digital Set Top Boxes
- Personal Video Recorders
- Broadband Communications
- Flat Panel Television and Monitors "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.
Design Notes
- Size the inductor for the ripple current at the actual switching frequency, typically 30% of the DC load — not for the DC rating alone.
- The hot loop from input capacitor through the switch to ground sets conducted EMI. Keep that copper area as small as the layout allows.
- Output ripple is set by the capacitor ESR and its DC-bias derating; a 10 µF ceramic often behaves like 4 µF at the rated output voltage.
- Route the feedback divider from the output capacitor terminals, away from the switch node.
Common Questions
What input voltage does the MP38874 support?
4.5 V to 21 V. The rated output is 8 A.
Which package and ordering codes apply to the MP38874?
QFN14; order codes include MP38874.
What are the defining features of the MP38874?
Wide 4.5V to 21V Operating Input Range 8A Continuous Output Current
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