New Industry Products

ON Semiconductor Intros CS5301 and CS5332 Controller ICs

May 24, 2001 by Jeff Shepard

ON Semiconductor (Phoenix, AZ) introduced a new multi-phase buck controller IC for powering high-performance microprocessors. The new CS5301 is a three-phase step down controller that employs the company's multi-phase control architecture. The new device integrates gate drivers, power-good indicators and a reference output. ON Semiconductor claims that its three-phase switching topology reduces ripple on the input and output so that lower-value external inductors and fewer capacitors can be employed.

ON Semi also introduced the new CS5332, a two-phase buck controller with four on-board gate drivers. Like its companion, the CS5332 runs from either 5V and/or 12V supplies and is fully specified for operation between 200 kHz and 800 kHz. Both ICs are claimed to have failsafe protection from over-voltage and over-current conditions and offer direct on/off control. Both modules feature loss-less current sensing, adjustable output voltage positioning and hiccup-mode current limiting.

"When designing a cost-effective power supply for today's high-performance microprocessors, the inherent benefits of highly integrated multi-phase controllers pass reduced manufacturing costs along to the PC consumer," said Leslie Logan, marketing manager for computing power management at ON Semiconductor. "Because board space continues to be a primary design constraint, we designed two controllers with a level of integration unmatched in the industry."

The new CS5301 and CS5332 meet the requirements for Intel's Pentium 4 and AMD Athlon processors. They are are housed in 28-lead and 32-lead SOICs, respectively. Either device is available in 1,000-piece quantities on tape and reel cartridges. Operating temperature range is 0 to 70 degrees C. Offered in quantities of 10,000 pieces, the CS5332 and CS5301 have a suggested resale pricing at $4.17 and $4.71, respectively.