The NCP1404 series are monolithic PWM/PFM stepup DC to DC converters which can automatically change operation mode from PWM to PFM at light loads to improve efficiency at light loads. With only four external components, this series allow a simple means to implement highly efficient converters for powering up portable equipment up to 350 mA loading. Additionally, this series is featured with a Low Battery Detector to monitor battery voltage. The NCP1404 device series are available in spacesaving TSOP6 package with five standard regulated output voltages. Additional voltages that range from 1.8 V to 5.0 V in 100 mV steps can be manufactured. Features