Microchip Switching Regulator, 5.5V dc Output Voltage, 5.5V dc Input Voltage, 250mA Output Current, 1 Outputs

The Microchip MCP16251/2 is a compact, high-efficiency, fixed frequency, synchronous step-up DC-DC converter. This family of devices provides an easy-to-use power supply solution for applications powered by either one-cell, two-cell or three-cell alkaline, NiCad, NiMH and one-cell Li-Ion or Li-Polymer batteries.

Up to 96% Typical Efficiency
IOUT > 100 mA @ 1.2V VIN, 3.3V VOUT
IOUT > 250 mA @ 2.4V VIN, 3.3V VOUT
IOUT > 225 mA @ 3.3V VIN, 5.0V VOUT
Low Start-up Voltage: 0.82V
Operating Input Voltage: down to 0.35V