ISL8117A

The ISL8117A is a synchronous buck controller to generate POL voltage rails and bias voltage rails for a wide variety of applications in industrial and general purpose segments. Its wide input and output voltage ranges make it suitable for telecommunication and after-market automotive applications. ISL8117A is a derivative from the ISL8117 by replacing its CLKOUT pin with COMP pin to provide flexibility to customers to configure the voltage loop compensation externally.

The ISL8117A uses the valley current modulation technique to bring hassle-free power supply design with a minimal number of components and complete protection from unwanted events. The ISL8117A offers programmable soft-start and enable functions along with a power-good indicator for ease of supply rail sequencing and other housekeeping requirements. In ideal situations, a complete power supply circuit can be designed with 10 external components and provide OV/OC/OT protections in a space conscious 16 Ld 4 × 4 mm QFN package. The package uses an EPAD to improve thermal dissipation and noise immunity. Low pin count, less number of external components and default internal values, makes the ISL8117A an ideal solution for quick to market simple power supply designs. The ISL8117A utilizes single resistor settings for other functions such as operating frequency and overcurrent protection. Its current mode control with V_IN feed-forward enables it to cover various applications. The unique DEM/Skipping mode at light load dramatically lowers standby power consumption with consistent output ripple over different load levels.