MP2112 2.5-6V, 1A, 1MHz Synchronous Step-Down Converter TSOT23

MP2112 2.5-6V, 1A, 1MHz Synchronous Step-Down Converter TSOT23

The MP2112 is a 1MHz constant frequency, current mode, PWM step-down converter.

Key Specifications

Features

• High Efficiency: Up to 95%
• 1MHz Constant Switching Frequency
• 1A Available Load Current
• 2.5V to 6V Input Voltage Range
• Output Voltage as Low as 0.6V
• 100% Duty Cycle in Dropout
• Current Mode Control
• Short Circuit Protection
• Thermal Fault Protection
• <0.1μA Shutdown Current

Typical Application Circuit

Applications

• Cellular and Smart Phones
• Microprocessors and DSP Core Supplies
• MP3 Players
• Digital Still and Video Cameras

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