APW7139应用领域
· TV Tuner/Box
· Portable Instrument

APW7139概述
The APW7139 consists of two independent 1.3MHz con-stant frequency, current mode, PWM step-down converters. Each converter integrates a main switch with a synchronous rectifier for high efficiency without an external Schottky diode. The APW7139 is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. Each converter can sup-ply 800mA of load current from a 2.5V to 5.5V input voltage.The output voltage can be regulated as low as 0.6V。The APW7139 can also run at 100% duty cycle for lowdropout applications.

APW7139主要特征
· 800mA Output Current on Each Channel
· 2.5V to 5.5V Input Voltage Range
· 1.3MHz Constant Frequency Operation
· Low Dropout Operation at 100% Duty Cycle
· Synchronous Topology
· 0.6V Low Reference Voltage
· Typical 0.1 mA Shutdown Current
· Current Mode Operation
· Over Temperature Protection
· Over Current Protection
· Up to 94% Efficiency
· Internally Compensated
· Lead Free Available (RoHS Compliant)