Intersil Corp. introduced the ISL6535 high-performance PWM (pulse width modulation) controller. This device integrates the control, gate drivers, output adjustment, monitoring and protection functions into a near-chipscale-sized 4mm x 4mm 16-lead QFN package.
Intersil’s ISL6535 integrates 12V, high-speed, 3A MOSFET gate drivers for excellent gate drive capability and improved efficiency with less expensive MOSFETs. Also, the converter can source and sink current, which is suitable for DDR (double data rate) memory applications.
"The ISL6535 error amplifier features 15MHz gain bandwidth and a 6V/µs slew rate that enables high converter bandwidth for fast transient performance," said Philip Chesley, Marketing Manager of Intersil’s Desktop Power Products Group. "The overcurrent protection monitors the current by using the rDS(ON) of the upper MOSFET, eliminating the need for a current sensing resistor and reducing the overall BOM cost."
The ISL6535 provides a simple, single feedback loop and voltage mode control architecture. It includes programmable switching frequency that is adjustable from below 50kHz to over 1.5MHz. The output voltage of the converter can be precisely regulated to as low as 0.597V, with a maximum tolerance of ±1% over the commercial temperature range, and ±1.5% over the industrial temperature range. Full (0% to 100%) PWM duty cycle support and pre-biased soft-start features are also provided.
The ISL6535 is targeted for use in a power supply for some Pentium,® PowerPC™ and graphic CPUs; high-power 12V-input dc-dc regulators; and low-voltage distributed power supplies.
The ISL6535 is available now in a 16-lead QFN package, with prices starting at $1.52 each and in a 14-lead SOIC package with prices starting at $1.39 each in 1,000-unit quantities.
