Microprocessor CORE Voltage Regulator Using Multi-Phase Buck PWM Control Without Programmable Droop

The ISL6554 is the first controller in the Intersil Multi-Phase family without the programmable droop feature. The ISL6554 in combination with the HIP6601A, HIP6602A or HIP6603A companion gate drivers and Intersil MOSFETs form a complete solution for high-current, high slew-rate applications. The ISL6554 regulates output voltage, balances load currents and provides protective functions for two to four synchronous-rectified buck-converter channels.

Features

• Multi-Phase Power Conversion

• Precision Channel Current Balance

- Lossless Current Sampling - Uses rDS(ON)

• Precision CORE Voltage Regulation

- ±1 System Accuracy Over Temperature

- No Programmable Droop

• Microprocessor Voltage Identification Input

- 5-Bit VID Decoder

- 0.95V to 1.70V in 25mV Steps

• Fast Transient Response

• Overcurrent Protection

• Selection of 2, 3, or 4 Phase Operation

• High Ripple Frequency (80kHz to 2MHz)

• Pb-Free Available (RoHS Compliant)

Applications

• Power Supply Controller for Intel® Itanium™ Processor Family

• Voltage Regulator Modules

• Servers and Workstations