MP28128 2.7-6V, 2.5A, 1.5MHz Synchronous Step-Down Converter QFN10

MP28128 2.7-6V, 2.5A, 1.5MHz Synchronous Step-Down Converter QFN10

The MP28128 is a 1.5MHz fixed frequency PWM synchronous step-down regulator with internal compensation.

Key Specifications

Features

• 2.5A Output Current
• Input Operation Range: 2.7V to 6V
• 1.5% Output Accuracy
• Internal Power MOSFET Switches
• All Ceramic Capacitor Design
• 1.5MHz Fixed Switching Frequency
• Internal Soft-Start
• Frequency Synchronization Input
• Power Good Output
• Cycle-by-Cycle Current Limiting

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 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