LTC News for Immediate Release For more information, tel. 408-432-1900 Doug Dickinson, Media Relations Mgr., ext. 2233 John Hamburger, Dir., Mkting Comm., ext. 2419 www.linear.com Low Voltage Input DC/DC Controller Drives N-Channel MOSFETs, Delivering up to 20A MILPITAS, CA – July 27, 2006 – Linear Technology Corporation introduces the LTC3822, a 2.75V to 4.5V input synchronous step-down DC/DC controller that drives N-channel MOSFETs without requiring an external supply for gate drive. In addition, the LTC3822 eliminates the need for a sense resistor by using MOSFET RDS(ON) sensing current, which improves efficiency and reduces solution cost. Although the LTC3822 drives N-channel MOSFETs, it is capable of operation at 99% duty cycle for very low dropout regulation. An adjustable operating frequency from 300kHz to 750kHz allows designers to size their systems, minimize noise interference and optimize efficiency. Applications include point-of-load conversion from 3.3VIN and portable devices with single Li-Ion batteries for up to 20A load current requirements. The LTC3822 provides excellent line and load regulation as well as fast transient response with its constant frequency current mode operation. The output is adjustable from 0.6V to 99% of the input voltage. Internal soft-start circuitry guarantees controlled startup to minimize inrush current and ensure proper regulation. The LTC3822 consumes only 340uA during operation and only 7.5uA in shutdown. The LTC3822 is offered in two packages a 10-lead MSOP and a smaller 3mm x 3mm DFN. It is rated for operation from -40ºC to 85ºC. 1,000-piece pricing is set at $2.10 each. Input DC/DC Controller Drives N-Channel MOSFETs, Delivering up to 20A Page 2 Photo Caption: 1.8V/8A High Efficiency Step Down Converter Summary of Features: LTC3822 • • • • • • Low VIN Operation: 2.75V to 4.5V No Sense Resistor Required Current Mode Operation Drives N-Channel MOSFETs 99% Duty Cycle (Low Dropout Operation) Supplies Up to 20A About Linear Technology Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com Contact: Doug Dickinson, Media Relations Manager Linear Technology Corporation 1630 McCarthy Boulevard Milpitas, CA 95035-7417 [email protected] 408-432-1900 READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company’s web site: http://www.linear.com Note: LT, LTC, LTM and are registered trademarks of Linear Technology Corp.