Renesas Electronics Corporation Special Purpose Regulators ISL6377IRZ

The ISL6377IRZ is a multiphase PWM regulator designed specifically for AMD Fusion CPUs and GPUs, compliant with the SVI 2.0 serial data bus interface. It features a dual output controller capable of supporting two voltage regulators, with three integrated gate drivers and the option for three external drivers, allowing for flexible configurations. The Core voltage regulator can operate in 1-, 2-, 3-, or 4-phase modes, while the Northbridge voltage regulator supports 1- or 2-phase configurations. This regulator utilizes Intersil's Robust Ripple Regulator (R3) technology, which enhances transient response and efficiency by automatically adjusting the switching frequency during load changes. Key specifications include a voltage output range of 0.5V to 1.55V with 0.5% system accuracy over temperature, and support for various current sensing methods, including lossless inductor DCR sensing and precision resistor sensing. Additional features include remote voltage sensing, adjustable switching frequency, overcurrent protection, and a small footprint in a 48-lead 6x6 QFN package. The ISL6377IRZ is suitable for applications in desktop computers requiring efficient power management for high-performance CPUs and GPUs.