Renesas' ISL81802 is a dual synchronous buck controller that generates two independent outputs or one output with two interleaved phases for a wide variety of applications in industrial and general-purpose segments. With wide input and output voltage ranges, the controller is suitable for telecommunication, datacenter, and computing applications.

The ISL81802 uses peak current mode control with phase interleaving for the two outputs. Each output has a voltage regulator, current monitor, and average current regulator to provide independent average voltage and current control. The internal phase-locked loop (PLL) oscillator ensures an accurate frequency setting from 100 kHz to 1 MHz, and the oscillator can be synchronized to an external clock signal for frequency synchronization and phase interleave paralleling applications. This PLL circuit can output a phase-shift-programmable clock signal that is expanded to three, four, and six phases with a required interleaving phase shift.

The ISL81802 features programmable soft-start and accurate threshold enable functions along with a power good indicator to simplify power supply rail sequencing. It also provides full protection features such as OVP, UVP, OTP, and average and peak current limit on both outputs to ensure high reliability.

The IC is packaged in a space-saving 32 LD 5 mm x 5 mm TQFN or an easy-to-assemble 4.4 mm x 9.7 mm 38 LD HTSSOP package. Both packages use an EPAD to improve thermal performance and noise immunity. The full-featured design with low pin count makes the ISL81802 an ideal solution for simple power supply designs that can be pushed to market quickly.