Dual-Output PWM Controller Features Low Cost

Mar 30, 2005 2:04 PM

Intersil Corp. has introduced a high-performance, dual PWM controller optimized for converting wall adapter, battery or network intermediate bus dc input supplies into the system supply voltages required for a variety of general-purpose products. The ISL6440 provides two independently programmable, synchronous buck-regulated voltage outputs. Employing voltage feed-forward with current-mode control, the controller operates from an input supply voltage range of 5.6 V to 24 V or 4.5 V to 5.6 V.

The two controllers can be operated 180 degrees out-of-phase to reduce the required input capacitance and power supply induced loads. No external current sense resistors are needed because the controllers employ lower MOSFET R_DS(ON) sensing.

Other features include programmable soft-start, power good indicator, undervoltage lockout, overcurrent protection, overtemperature protection and independent shutdown for both PWMs.

The ISL6440 is available now in a 24-lead, 5-mm × 5-mm QSOP. Pricing in 10,000-unit quantities is $1.30 each.

For more information, visit www.intersil.com.

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