ISL6444
ISL6444 is Dual PWM Controller manufactured by Renesas.
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Dual PWM Controller with DDR Memory Option for Gateway Applications
FN9069 Rev 3.00 Apr 12, 2007
The ISL6444 PWM controller provides high efficiency and regulation for two output voltages adjustable in the range from 0.9V to 5.5V that are required to power I/O, chip-sets, and memory banks in high-performance notebook puters, PDAs, and Internet appliances.
Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads. The hysteretic mode of operation can be disabled separately on each PWM converter if continuous conduction operation is desired for all load levels. Efficiency is even further enhanced by using MOSFET’s r DS(ON) as a current sense ponent.
Feed-forward ramp modulation, current mode control scheme, and internal feed-back pensation provide fast...
