The MCP1603-250I/MC is a high efficiency fully integrated 500 mA 2.0 MHz synchronous buck regulator ideally suited for Li-Ion/NiMH Battery powered application powered.At heavy loads, the MCP1603-250I/MC operates in the 2.0 MHz fixed frequency PWM mode which provides a low noise, low output ripple, small-size solution. When the load is reduced to light levels, the MCP1603-250I/MC automatically changes operation to a PFM mode to minimize quiescent current draw from the battery. No intervention is necessary for a smooth transition from one mode to another. These two modes of operation allow the MCP1603-250I/MC to achieve the highest efficiency over the entire operating current range.
Feature
- Small packages: TSOT-23 and 2x3 DFN
- PWM/PFM automatic transistion
- Over current and temperature protection
- Automatic PWM/PFM mode transition
- Eff. 90%, Shutdown Current 100 nA
- Small passives 4.5 microhenry, 4.5 microfarad
