Datasheet Microchip MCP1601 — Datenblatt

MCP1601
500 mA Synchronous BUCK Regulator
Features Description The MCP1601 is a fully integrated synchronous BUCK
(step down) DC/DC converter for battery powered systems. With an input operating range of 2.7V to 5.5V, the
MCP1601 is ideal for applications being powered by
one single cell Li-Ion, 2 to 3 cell NiMH, NiCd or alkaline
sources. Output voltages can range from 0.9V to VIN to
accommodate a wide range of applications. Efficiency
can exceed 92% while operating at 750 kHz with load
current capability up to 500 mA. The MCP1601 is used
to minimize space, cost and wasted energy. Input Range of 2.7V to 5.5V
3 Operating Modes: PWM, PFM and LDO
Integrated BUCK and Synchronous Switches
Ceramic or Electrolytic Input/Output Filtering
Capacitors
750 kHz Fixed Switching Frequency
Oscillator Synchronization to 1 MHz PWM Mode
Auto-Switching from PWM/PFM Operation
100% Duty Cycle Capable for Low Input Voltage
500 mA Continuous Output Current Capability
Integrated Under-Voltage Lock-Out Protection
Integrated Over-Temperature Protection
Integrated Soft Start Circuitry …

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 …