ISL820X Step-Down Power Modules

The pin-compatible 3 A ISL820x family of single-channel power modules from Renesas offers a 0.6 V to 5 V output range with ±1.6% accuracy over line/load/temperature, and up to 95% efficiency. Operating from a single 2.6 V to 5.5 V input power rail and integrating controller, power inductor, and MOSFETs, the ISL8202M only requires a few external components to operate and is optimized for space constrained and portable battery-operated applications. The selectable light load efficiency and 100% duty cycle LDO support Energy Star compliance and extend battery life. The ISL8202M power module is a single-channel synchronous step-down complete power supply, capable of delivering up to 3 A of continuous current.

ISL8203M can be configured as a dual-channel 3 A or a single-channel 6 A power module. Supporting parallel operations for 12+ A output currents, the ISL8203M is so flexible that it reduces design time for virtually all low power point of load designs. Based on a current mode PWM control scheme, the ISL8202M provides a fast transient response and excellent loop stability as well as a very low duty cycle with an adjustable output voltage as low as 0.6 V and better than 1.6% accuracy over line and load conditions. Operation frequency is selectable through an external resistor with a 1.8 MHz default setting or may be synchronized with an external clock signal up to 3.5 MHz.

The ISL8202M also implements a selectable PFM mode to improve light-load efficiency and a 100% duty cycle LDO mode to extend battery life. A programmable soft-start reduces the inrush current required from the input supply while an automatic output discharge ensures a soft stop. Dedicated enable pin and power-good flag allow for easy system power rails sequencing. An array of protection features, including input undervoltage lockout (UVLO), overtemperature, overcurrent/short-circuit with hiccup mode, overvoltage, and negative overcurrent, guarantees safe operations under abnormal operating conditions. ISL820x products are available in a compact RoHS compliant 22-lead 4.5 mm x 7.5 mm x 1.85 mm QFN package which makes them ideal for portable equipment, mobile, battery-operated, and IoT applications.