| Description & Applications | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers with Integrated Vref LDO •2MHz (typ.) PWM Switching Frequency • Operates from a single Li-Ion cell (2.7V to 5.5V) •Variable Output Voltage (0.8V to 3.6V) • 650mA Maximum load capability •High Efficiency (95% Typ at 3.9VIN, 3.4VOUTat 400mA) from internal synchronous rectification •Integrated Vref LDO • Regulated LDO Output up to 10mA max • Fast 3uS Vref LDO On/Off Time • 9-pin micro SMD Package • Current Overload Protection •Thermal Overload Protection • Cellular Phones • Hand-Held Radios • RF PC Cards •Battery Powered RF Devices |