IT77103 - M3TEK

IT77103 5V/800mA High Efficiency Step-Down DC/DC Converter

The IT77103 is a high efficiency step-down DC/DC converter using a constant frequency, current mode architecture. The device integrates a main switch and a synchronous rectifier for high efficiency without an external schottky diode. Supply current during operation is only 160µA and drops to < 1µA after shutdown. The IT77103 can supply 800mA of load current .

Features

High Efficiency up to 95% 160µA Low Quiescent Current (Active Mode) 2.5V to 6.0V Input Voltage Range 800mA Output Current Fixed Frequency Operation Allowable 0.6V Low Output Voltage Current Mode Operation Internal Soft-start Over-temperature Protection 0.1µA Shutdown Current TSOT23_5L/ SOT23_5L Small Package RoHS Compliant (100% Green Available) Applications Cellular Telephone PDA and Smart Phone MP3 Player Microprocessor and DSP Core Supply Wireless and DSL Card Digital Still Camera Slim-Type DVD Portable Device Typical Applications Figure 1. Typical Application Circuit Efficiency (% ) Eff.