MCP1601, 500 mA Synchronous Buck Regulator
The MCP1601, 500 mA synchronous buck regulator,
is a fully integrated DC-to-DC switching converter that
requires neither an external power transistor nor a
power diode for operation within its rated current range.
It is designed for down-converting standard battery and
bus voltages to the operational voltages required in
various systems. It has an adjustable output range of
0.9V to VIN and can be powered with an input voltage
range of 2.7V to 5.5V. Given this input range, the
MCP1601 is ideal for applications being powered with
a single cell Li-Ion, or two or three cell NiMH, NiCd or
alkaline batteries, as well as, from standard system
bus voltages such as 5.0V, 3.3V or 3.0V. Some typical
battery powered applications include: Cell Phones,
PDAs, Digital Cameras, and USB powered devices.
At the internally set PWM (Pulse Width Modulation)
frequency of 750 kHZ, the MCP1601 can exceed 92%
efficiency and deliver 500 mA of load current, while
using low profile surface mount inductors and ceramic
capacitors. Together these features minimize space,
cost and wasted power.
The MCP1601 has three operating modes; PWM for …