The ISL85003/A and ISL85005/A can operate from a 4.5V to 18V input voltage with the output voltage as low as 0.8V. The ISL85003/A and ISL85005/A are pin-compatible, efficient, and capable of delivering up to 5A in a small 3mm x 4mm DFN package. The ISL85003A and ISL85005A have an adjustable soft-start feature to limit the in-rush current during start-up. The ISL85003 and ISL85005, on the other hand, offer a sync function to synchronize to an external clock signal with frequency ranges from 300kHz to 2MHz. This feature can be used to minimize the input voltage ripple (beat frequency) and reduce EMI in applications with multiple DC/DC converters.