General Description

The APW7179 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 APW7179 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 APW7179 can also run at 100 duty cycle for low dropout applications.

特性 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