EML3408 is designed with high efficiency step down DC/DC converter for portable devices applications.It features with extreme low quiescent current withno load which is the best fit for extending battery life during the standby mode. The device operates from 2.5V to 5.5V input voltage and up to 800mA output current capability. High 1.5MHz internal frequency makes small surface mount inductors and capacitors possible and reduces overall PCB board space. Further, build-in synchronous switch makes external Schottky diode is no longer needed and efficiency is improved. EML3408 is designed base on pulse width modulation (PWM) for low output voltage ripple and fixed frequency noise, low dropout mode provides 100% duty cycle operation. Low reference voltage is designed for achieving regulated output down to 0.6V. The device is available in an adjustable version and fixed output voltages of 1.2V, 1.5V, 1.8V and 3.3V. The EML3408 is available in SOT-23-5 package.