Intersil Introduces 95 Percent Efficiency Synchronous Step-Down Controller

Intersil Introduces 95 Percent Efficiency Synchronous Step-Down Controller

Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog solutions, today expanded its power management portfolio with the introduction of a synchronous step-down controller with up to 95 percent efficiency. The ISL88550A integrates a synchronous buck PWM (pulse width modulation) controller, a sourcing and sinking LDO (low dropout) regulator, and a 10mA reference output buffer.

The PWM controller generates VDDQ (voltage for double data rate memory), the LDO regulator generates VTT (termination voltage supply) and the reference output buffer generates VTTR (termination voltage reference). With the combined features, the ISL88550A provides a complete solution for DDR (double data rate) I and II memory power supplies. It can also be used for other applications that require voltages down to 0.7V.

“Intersil’s ISL88550A uses a constant-on-time PWM architecture with a programmable switching frequency of up to 600KHz,” said Majid Kafi, director of Intersil’s Notebook Power group. “This control feature handles wide input/output voltage ratios with ease and provides 100ns ‘instant-on’ response to load transients while maintaining high efficiency and a constant switching frequency that is ideal for DDR memory applications in desktops, notebooks and graphics cards.”