MP8652 4.5-14V, 15A, 400kHz High Frequency Step-Down Converter

MP8652 4.5-14V, 15A, 400kHz High Frequency Step-Down Converter

The MP8652 is a monolithic step-down switch mode converter with a built in internal power MOSFET.

Key Specifications

Features

• Wide 4.5V to 14V Operating Input Range
• 15A Output Current
• 25mΩ Internal Power MOSFET Switch
• Synchronous Gate Driver Delivers up to 95% Efficiency
• Synch from 300kHz to > 1MHz External Clock or 400kHz Fixed Switching Frequency
• Synch Output to Drive Another Regulator in Phase-Shift Operation
• Feedback Voltage Accuracy: 2%
• Programmable Soft-Start
• Startup Tracking
• EN and Power Good for Power Sequencing

Typical Application Circuit

Applications

• Distributed Power Systems
• Pre-Regulator for Linear Regulators
• Compact DC-DC Regulator for PCB Space Limited Platforms "MPS" and "The Future of Analog IC Technology" are 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