The SC4502/SC4502H is a high-frequency current-mode step-up switching regulator with an integrated 1.4A power transistor. Its high switching frequency (programmable up to 2MHz) allows the use of tiny surface-mount external passive components. Programmable soft-start eliminates high inrush current during start-up. The internal switch is rated at 32V (40V for the SC4502H) making the converter suitable for high voltage applications such as Boost, SEPIC and Flyback. The operating frequency of the SC4502/SC4502H can be set with an external resistor. The ability to set the operating frequency gives the SC4502/SC4502H design flexibilities. A dedicated COMP pin allows optimization of the loop response. The SC4502/SC4502H is available in thermally enhanced 10-pin MLPD package.