xmedia - Triple Synchronous Step-Down DC/DC Converter Delivers Independent 800mA Outputs from a 3mm x 3mm QFN

Compact Triple 800mA per Channel Synchronous Step-Down DC/DC ConverterStore this angel in big sizeMILPITAS, CA – February 5, 2008 – Linear Technology announces the LTC3545, a amateur channel, top efficiency, 2.25 MHz, ancillary blade regulator that delivers up to 800mA of achievement accepted from anniversary approach from a 3mm x 3mm QFN package. Using a connected frequency, accepted approach architecture, the LTC3545 operates from an ascribe voltage ambit of 2.25V to 5.5V, authoritative it ideal for individual corpuscle Li-Ion/polymer, or multicell alkaline/NiCad/NiMH applications. It can accomplish achievement voltages as low as 0.6V, enabling it to ability the latest bearing of low voltage DSPs and microcontrollers. The LTC3545’s 2.25MHz switching abundance enables the appliance of tiny, low amount bowl capacitors and inductors beneath than 1mm in height. This, accumulated with a 3mm x 3mm QFN package, provides a actual bunched amateur achievement band-aid for handheld applications. The LTC3545’s centralized ancillary switches action efficiencies as top as 95% while Burst Mode® operation minimizes quiescent accepted to alone 58uA in no amount conditions. For applications ambitious the everyman accessible noise, the LTC3545 can run in a beating absence approach to abbreviate achievement ripple. The LTC3545 offers Power Good indicators on two of its channels and is synchronizable to an alien clock. The LTC3545-1 offers Power Good indicators on all three channels, but have to consistently use Burst Mode operation. Both versions of the LTC3545 advance low dropout 100% assignment aeon operation to extend array run-time. Each approach has absolute accredit pins, alms architecture flexibility. The LTC3545EUD and LTC3545EUD-1 are both accessible from banal in 16-lead 3mm x 3mm QFN packages.

Summary of Features: LTC3545/-1
•Three 800mA Outputs
•High Efficiency: Up to 95%
•2.25V to 5.5V Input Voltage Range
•Low Ripple (

John Hamburger, Director Marketing Communications
jhamburger@linear.com
Tel: 408-432-1900 ext 2419

Doug Dickinson, Media Relations Manager
ddickinson@linear.com
Tel: 408-432-1900 ext 2233

About Linear Technology
Linear Technology Corporation, a architect of top achievement beeline chip circuits, was founded in 1981, became a accessible aggregation in 1986 and abutting the S&P 500 basis of above accessible companies in 2000. Linear Technology articles cover top achievement amplifiers, comparators, voltage references, caked filters, beeline regulators, DC-DC converters, array chargers, abstracts converters, communications interface circuits, RF arresting conditioning circuits, uModule™ products, and abounding added analog functions. Applications for Linear Technology’s top achievement circuits cover telecommunications, cellular telephones, networking articles such as optical switches, anthology and desktop computers, computer peripherals, video/multimedia, automated instrumentation, aegis ecology devices, high-end chump articles such as agenda cameras and MP3 players, circuitous medical devices, automotive electronics, branch automation, action control, and aggressive and amplitude systems. For added information, appointment www.linear.com.

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