15032

1 LTC1503-1.8/LTC1503-2 High Efficiency Inductorless Step-Down DC/DC Converters n Input Voltage Range: 2.4V to 6V n Fixed Output Voltages: 1.8V – 4%, 2V – 4% n Output Current: Up to 100mA n No Inductors n Typical Efficiency 25% Higher than LDOs n Low Operating Current: 25m A n Low Shutdown Current: 5m A n 600kHz Switching Frequency n Shutdown Disconnects Load from V IN n Soft-Start Limits Inrush Current at Turn-On n Short-Circuit and Overtemperature Protected n Available in 8-Pin MSOP and SO Packages The LTC ? 1503-1.8/LTC1503-2 are switched capacitor step-down DC/DC converters that produce a regulated output from a 2.4V to 6V input. The parts use switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load condi- tions vary. Typical efficiency is 25% higher than that of a low dropout (LDO) linear regulator. Regul