DATASHEET
ISL6353 FN6897
Rev 0.00
September 15, 2011 Multiphase PWM Regulator for VR12 DDR Memory Systems
The ISL6353 is a three-phase PWM buck regulator controller for
VR12 DDR memory applications. The multi-phase
implementation results in better system performance, superior
thermal management, lower component cost and smaller PCB
area.
The ISL6353 has two integrated power MOSFET drivers for
implementing a cost effective and space saving power
management solution.
The PWM modulator of the ISL6353 is based on Intersil’s Robust
Ripple Regulatorв„ў (R3) technology. Compared with the
traditional multi-phase buck regulator, the R3 modulator
commands variable PWM switching frequency during load
transients, achieving faster transient response. R3 also naturally
goes into pulse frequency modulation operation in light load
conditions to achieve higher light load efficiency.
The ISL6353 is designed to be completely compliant with VR12
specifications. The ISL6353 has a serial VID (SVID) bus
communicating with the CPU. The output can be programmed for
1-, 2-or 3-phase interleaved operation. The output voltage and …