ISL8202M/05M Power Modules

Renesas' ISL8202M and ISL8205M power modules are single-channel synchronous step-down complete power supplies, capable of delivering up to 3 A and 5 A of continuous current. Operating from a single 2.6 V to 5.5 V input power rail and integrating controller, power inductor and MOSFETs, the ISL8202M and ISL8205M only require a few external components to operate and is optimized for space-constrained and portable battery-operated applications.

Based on current mode PWM control scheme, the ISL8202M and ISL8205M provide a fast transient response and excellent loop stability. These modules have 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 1.9 MHz default setting or may be synchronized with an external clock signal up to 3.5 MHz.

The ISL8202M and ISL8205M also implement 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), over-temperature, overcurrent/short-circuit with hiccup mode, overvoltage and negative overcurrent, guarantee safe operations under abnormal operating conditions. The ISL8202M and ISL8205M are available in compact, RoHS-compliant 22 Ld 4.5 mm x 7.5 mm x 1.85 mm QFN packages.

The ISL8202MEVAL1Z and ISL8205MEVAL1Z evaluation boards are designed to demonstrate the performance of the ISL8202M and ISL8205M. The boards are by default set to be 1.2 V output voltage with 1.5 MHz (ISL8202M) or 1.6 MHz (ISL8205M) switching frequency. Other output voltage values can be easily set by changing the jumper position. Switching frequency can be adjusted by changing the FS pin resistor.