Si9167

Product is End of Life 3/2014 Si9167 Vishay Siliconix 600-mA Synchronous Buck Converter for 2-Cell Li+ Cellular Phones DESCRIPTION The Si9167 provides a fully integrated synchronous buck converter solution for the latest 2-cell Lithium Ion battery cellular phones. Capable of delivering up to 600 mA of output current, the Si9167 provides ample power for various Baseband circuits as well as for some PAs. The Si9167 combines the 2 MHz switching frequency with fully integrated high-frequency MOSFETs to deliver the smallest and most efficient converter available today. The 2 MHz switching frequency reduces the inductor height to a new level of less than 2 mm and minimizes the output capacitance requirement to less than 10 µF, with only 10 mV peakto-peak output ripple. Combined with its integrated low gate charge high-frequency MOSFETs and internal synchronous rectifier, the Si9167 delivers efficiency up to 95 %. The programmable pulseskipping mode maintains high efficiency even during the standby mode to increase overall battery life and talk time. In order to extract the last ounce of power from battery, Si9167 is designed with 100 % duty cycle capability for both PSM and PWM operating modes. With 100 % duty cycle, Si9167 operates like a saturated linear regulator to deliver the highest potential output voltage. The Si9167 is available in TSSOP-20 pin package. In order to satisfy the stringent ambient temperature requirements, Si9167 is specified over the industrial temperatur...