Dual PWM chip provides flexible power regimes

The ISL6539 is a dual PWM controller IC designed to provide cost-saving power solutions for a wide range of applications.

The ISL6539 is a dual PWM controller IC designed to provide cost-saving power solutions for a wide range of applications including DSPs, FPGAs, ASICs, DDR memory, graphics, embedded systems, desktop PC chipsets and general system needs.

The high integration of two controllers with full protection and monitoring features makes the ISL6539 a desirable choice for space and cost savings.

This dual controller accepts an input voltage from 5 to 15V and can operate from a 3.3 or 5V bus.

Output voltage is in the range of 0.9 to 5.5V.

The ISL6539 delivers excellent dynamic response with voltage feed-forward and current mode control accommodating a wide range of inductor/capacitor filter selections.

Voltage feed-forward ramp modulation, current-mode control, and internal feedback compensation provide fast response to input voltage and load transients.

Input current ripple is minimized through the use of a channel-to-channel PWM phase shift of 0, 90 or 180 degrees and is determined by the input voltage and the status of the DDR pin.

On-chip tracking and a buffered reference output make the ISL6539 ideal for DDR1 and DDR2 memory power.

By activating the DDR pin, the ISL6539 is transformed into a complete DDR memory power supply solution.

In DDR mode, the channel two output voltage (VTT) tracks at half the channel one output voltage (VDDQ).

The channel two output can both source and sink current - an essential power supply feature for DDR memory.

In dual power supply applications, the ISL6539 monitors the output voltage of both channels.

Back to top