MP38115 1.1-5.5V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator QFN10

MP38115 1.1-5.5V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator QFN10

The MP38115 is an internally compensated 1.5MHz fixed frequency PWM synchronous step-down regulator.

Key Specifications

Features

• 4A Output Current
• Input Operation Range: 1.1V to 5.5V
• 60mΩ Internal Power MOSFET Switches
• All Ceramic Capacitor Design
• Up to 95% Efficiency
• 1.5MHz Fixed Switching Frequency
• Adjustable Output from 0.8V to 0.9xVIN
• Internal Soft-Start
• Frequency Synchronization Input
• Power Good Output

Typical Application Circuit

Applications

• µP/ASIC/DSP/FPGA Core and I/O Supplies
• Printers and LCD TVs
• Network and Telecom Equipment
• Point of Load Regulators "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