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 400mA MicroPower Synchronous Step-up Regulators with Output Disconnect in an SC70 MILPITAS, CA – October 18, 2005 – Linear Technology announces the LTC3525-3.3 and LTC3525-5, 400mA synchronous step-up DC/DC converters with true output disconnect and inrush current limiting in SC70 packages. They operate from an input voltage range of 1V to 4.5V, making them ideal for single- and multicell alkaline/NiCd/NiMH, as well as Li-Ion applications. The LTC3525-3.3 offers a fixed 3.3V output whereas the LTC3525-5 has a fixed 5V output. The LTC3525-3.3 can deliver up to 140mA of continuous output current from dual AA alkaline cells. The LTC3525-5 can deliver up to 175mA at 5V from a 3V input. Both devices use synchronous rectification to enable efficiencies of up to 95%. Their Burst Mode® operation lowers quiescent current to only 7uA, providing maximum battery run-time in handheld applications. The combination of an SC70 package plus only 3 tiny externals provides small solution footprints as required in space constrained applications. The LTC3525-3.3 and LTC3525-5 both incorporate internal switches with an RDS(ON) of only 0.5 Ohm (N-Channel) and 0.8 Ohm (P-Channel). Combined with their unique Adaptive Power Control switching topology, they deliver efficiencies greater than 90% to loads varying from 1mA to 100mA. Both parts offer output disconnect and inrush current limiting to restrict the current during start-up, minimizing surge currents seen by the input supply. Additional features include anti-ringing control, short-circuit protection and thermal protection. The LTC3525-3.3 and LTC3525-5 deliver ideal solutions for boost applications requiring up to 150mA of output current, and where a small solution size and maximum battery run-time are defining factors. Both the LTC3525ESC6-3.3 and the LTC3525ESC6-5 are available from stock in a 6-Lead SC70 package. 1,000-piece pricing starts at $1.75 each. (more...) 400mA MicroPower Synchronous Boost Regulators with Output Disconnect in an SC70 Page 2 Summary of Features: LTC3525ESC6-3.3/5 • • • • • • • • • • • • Up to 95% Efficiency Output Disconnect & Inrush Current Limit Fixed Output Voltages of 3.3V or 5V Delivers 60mA at 3.3V from a 1V Input, or 140mA at 3.3V from a 1.8V Input Delivers 175mA at 5V from a 3V Input Burst Mode Operation: IQ = 7uA Only Three External Components 1V to 4.5V Input Range <1uA Shutdown Current Short-Circuit and Overtemperature Protection Very Low Solution Footprint Profile of 1mm Tiny 6-Pin SC-70 Package About Linear Technology Corporation 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, Burst Mode, and Corp. are registered trademarks of Linear Technology