DATASHEET
ISL6539
Wide Input Range Dual PWM Controller with DDR Option
FN9144 Rev 6.00 Apr 29, 2010
The ISL6539 dual ...
DATASHEET
ISL6539
Wide Input Range Dual PWM Controller with DDR Option
FN9144 Rev 6.00 Apr 29, 2010
The ISL6539 dual PWM controller delivers high efficiency and tight regulation from two
voltage regulating synchronous buck DC/DC converters. It was designed especially for DDR DRAM, SDRAM, graphic chipset applications, and system regulators in high performance applications.
Voltage-feed-forward ramp modulation, current mode control, and internal feedback compensation provide fast response to input
voltage and output load transients. Input current ripple is minimized by channel-to-channel PWM phase shift of 0°, 90° or 180° (determined by input
voltage and status of the DDR pin).
The ISL6539 can control two independent output
voltages adjustable from 0.9V to 5.5V or, by activating the DDR pin, transform into a complete DDR memory power supply solution. In DDR mode, CH2 output
voltage VTT tracks CH1 output
voltage VDDQ. CH2 output can both source and sink current, an essential power s...