The ISL6336A controls microprocessor core voltage regulation by driving up to 6 interleaved synchronous-rectified buck channels in parallel. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple currents. Lower ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area. The ISL6336A is compliant with Intel’s VR11.1 specification. Features include a pin (IMON) for current monitoring and a Power State Indicator (PSI#) input pin to initiate a proprietary phase dropping and diode emulation scheme for higher efficiency at light load by dropping to 1- or 2-phase operation with optional diode emulation (ISL6336) to reduce switching and core losses in the converter. After the PSI# signal is de-asserted, the dropped phase(s) are added back to sustain heavy load transient and efficiency. A unity gain, differential amplifier is provided for remote voltage sensing and eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start up of the ISL6336, ISL6336A with any other voltage rail. Dynamic-VID technology allows seamless on-the-fly VID changes. The offset pin allows accurate voltage offset settings that are independent of VID setting.
Intel VR11.1 Compliant
Proprietary Active Pulse Positioning and Pin Adaptive Phase Alignment Modulation Scheme
Proprietary Active Phase Adding and Dropping with Diode Emulation for High Efficiency at Light Load
Precision Multiphase Core Voltage Regulation
Differential Remote Voltage Sensing
±0.5% System Accuracy Over Life, Load, Line and Temperature