International Rectifier introduced its third generation of integrated, feature-rich SupIRBuck® synchronous buck voltage regulators designed to address the new requirements of emerging energy efficient netcom, server and storage applications.
The new SupIRBuck single output devices feature a newly patented modulator scheme that generates the industry's smallest, jitter free pulse widths. The ability to generate narrow pulses coupled with robust source/sync current handling capability makes this family ideal for generating DDR memory termination voltage directly from 12Vin.
In addition to standard SupIRBuck features of switching frequency up to 1.5MHz, pre-biased start-up, input voltage aware enable, tracking and programmable power-good, these third generation SupIRBuck devices offer a host of additional features and improvements compared with previous generation devices to address the needs of telecom, netcom, server and storage customers including reference voltage accuracy of 0.5%, enhanced line/load regulation with input voltage feed-forward and thermal compensation for current limit. Other enhancements include analog input for margining, PLL for smooth external frequency synchronization, start/stop ramp and minimum input voltage of 1.0V.
The IR3894 and IR3895 SupIRBuck voltage regulators and trackers integrate IR's latest generation high performance controller with power MOSFETs in a slim PQFN 5x6mm package, and deliver 12A and 16A output current respectively to achieve more than 96% peak efficiency. The IR3897, IR3898 and IR3899 deliver 4A, 6A and 9A respectively in a 4x5mm package. These are ideal for low duty cycle single input applications, from 5V or 6.8V to 21V with operating junction temperatures of -40oC to 125oC. The common footprint of the devices provides design flexibility and allows cut-and-paste layout for fast time-to-market.
Pricing for the IR3897 begins at US $1.72 each in 10,000-unit quantities. The IR3898 and IR3899 cost US $2.06 and US $2.40 each respectively in 10,000-unit quantities and the IR3894 and IR3895 cost US $2.76 and US $3.10 each respectively in 10,000-unit quantities. Pricing for the IRDC38(99)(98)(97)(95)(94) SupIRBuck reference designs start at US $29 per kit. Production orders are available immediately. Prices are subject to change.
Part Number: SupIRBuck