ISL6398IRTZ

The ISL6398 features remote voltage sensing and eliminates potential differences between remote and local grounds for improved regulation and protection accuracy. It is SMBus/PMBus/I2C compatible with programmable features such as IMAX, TMAX, BOOT, address, soft-start rate, DVID rate, and more. It also has a patented Advanced Linear EAPP Digital control scheme for digitally programmable compensation and auto phase shedding. The ISL6398 can achieve fast linear transient response with fewer output capacitors and has features like monitoring load current and auto-phase shedding for efficiency optimization.

The ISL6398 achieves fast linear transient response through its Enhanced Active Pulse Positioning (EAPP) digital control scheme. This scheme processes voltage and current information in real-time for fast control and high-speed protection. It overcomes hurdles of traditional digital approaches by using a non-linear, discrete control method for both voltage and current loops, avoiding beat frequency oscillation and non-linear response . This digital control scheme allows for fewer output capacitors, leading to a more efficient operation with lower phase count at light loads. Additionally, the ISL6398 features auto-phase shedding, where dropped phases are added back during heavy load transients to sustain efficiency and performance. This optimization from light to full load ensures a greener environment without sacrificing transient performance . The benefits of this fast linear transient response include improved efficiency at light loads, reduced magnetic core and switching losses, and high efficiency even during low power operation. The ISL6398 also features remote voltage sensing to eliminate potential differences between remote and local grounds, improving regulation and protection accuracy .

The ISL6398 is designed for cloud computing, networking, datacenter, and POL applications. It is suitable for multiphase power conversion systems, supporting up to 24-phase count systems for improved thermal distribution and power conversion efficiency at heavy loads. The controller is compatible with phase doublers, such as ISL6611A and ISL6617, and supports coupled inductor design. It features Intersil's Advanced Linear EAPP digital control scheme for fast control, high-speed protection, and digital power management capability. The ISL6398 allows for programmable system parameters and registers that can be stored into selected memory banks via PMBus, with no firmware required. This flexibility enables the ISL6398 to be used in up to 8 different applications, simplifying system design and reducing inventory complexity and cost .