General Description

The APW7176 consists of two independent 1.5MHz constant frequency, current mode, and PWM step-down converters. Each converter integrates a main switch with a synchronous rectifier for high efficiency without an external Schottky diode. The APW7176 is ideal for powering portable equipment that runs from a single cell LithiumIon (Li+) battery. Each converter can supply 1A of load current from a 2.7V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The APW7176 can also run at 100% duty cycle for low dropout applications.

Features

· 1A Output Current on Each Channel

· 2.7V to 5.5V Input Voltage Range

· 1.5MHz Constant Frequency Operation

· Low Dropout Operation at 100% Duty Cycle

· Synchronous Topology

· 0.6V Low Reference Voltage

· Current Mode Operation

· Over-Temperature Protection

· Over-Current Protection

· Up to 94% Efficiency

· Internally Compensated

· Lead Free and Green Devices Available (RoHS Compliant)

Applications

· TV Tuner/Box

· Portable Instrument