Intersil Unveils ISL6215/ISL6205 Power Solution
Intersil Corp. (Irvine, CA) announced a new highly efficient power management solution for future Mobile Intel Pentium 4 processors used in notebooks, hand-held data terminals and point-of-sale terminals. The solution includes Intersil's new ISL6215 multiphase PWM controller and ISL6205 MOSFET driver ICs. The ISL6215 is optimized to provide power-saving modes for Mobile Pentium 4 processor power management.
Intersil's ISL6215 multiphase PWM controller operates two or three ISL6205 MOSFET drivers for modular power partitioning, simplifying component placement, regulating channel current and offering efficient heat distribution. The ISL6215 controller offers automatic single-channel operation in low-power states to maximize efficiency. Loss-less current sensing improves efficiency while eliminating the need for a current-sense resistor. Low power consumption and a low-leakage current extend battery runtime for the end user. Voltage accuracy is maintained at one percent over the entire temperature range.
The ISL6205 MOSFET driver ICs work with the ISL6215 controller to provide enhanced over-voltage, under-voltage and over-current protection. Each ISL6205 IC drives both the high- and low-side n-channel MOSFETs required in the synchronous-buck converter. A high switching frequency allows the use of smaller filter components. Adaptive shoot-through protection provides for circuit optimization. Patented three-state PWM inputs significantly reduce negative transients on the output voltage when it is being shut down, eliminating the need for an additional schottky diode to protect the CPU from negative voltages. The ISL6205 handles phase voltages over a range of –5V to +25V.
