San Jose, Calif. - Analog double-data-rate (DDR) termination regulator chips from Philips Semiconductors are said to reduce the overall cost of a DDR termination system by as much as 50 percent and to cut board space by up to 60 percent compared with switch-mode designs. The NE57810 and NE57811 can be used in desktop PCs, servers and workstations, set-top boxes and digital video recorders.
The regulators each provide the peak 3.5-amp current load (at 1.25 volts) called for in the Jedec DDR specifications. Overcurrent and overtemperature circuits protect the devices in the event of any system failures.
Strategic-marketing manager Warren Severin described the regulators as thermally robust, with SOT756 (SPAK-5) packages that have very low junction-to-ambient-temperature coefficients. "This means that these devices can be used in most applications with minimal attention to cooling, freeing designers from thermal design headaches," he said. "Due to their fast response to load changes, these devices require significantly less output capacitance than competing linear or discrete system designs and are stable with as little as 100-microfarad load capacitance."
Philips' DDR chips are compatible with today's 2.5-V memory systems and will support next-generation 1.8-V systems. Each is priced at 85 cents in high volumes. Samples are available now.
Call (800) 234 7381