xmedia - 600mA (ISW), 2.2MHz Synchronous Boost Regulator with Output Disconnect and LDO in a 3mm x 3mm QFN

600mA, 2.2MHz Synchronous Step-Up with Output DisconnectStore this angel in big sizeMILPITAS, CA – February 14, 2008 – Linear Technology Corporation announces the LTC3537, a 2.2MHz, accepted approach ancillary addition DC/DC advocate with chip achievement disconnects additional an LDO. The LTC3537’s addition converter’s centralized 600mA switches can bear achievement voltages as top as 5.25V from an ascribe voltage ambit of 0.68V at start-up (0.5V if running) to 5V, authoritative it ideal for Li-Ion/Polymer or single/multicell alkaline/NiMH applications. The LTC3537 can bear up to 100mA of connected achievement accepted (at 3.3V) from a individual acrid corpuscle or 300mA from a bifold corpuscle input. Synchronous alteration enables efficiencies of up to 94% while a 2.2MHz switching abundance minimizes the absolute band-aid footprint. The additional channel, a 100mA LDO, has an ascribe ambit of 1.8V to 5.5V and can bear outputs as low as 0.6V. It can be apprenticed by either the ascribe voltage antecedent or the addition converter’s output, accouterment architecture flexibility. The LDO channel’s 100mV dropout voltage and 24db ripple bounce (@fSW) action a bunched and low babble accessory output. With both channels in operation; the Burst Mode® operation or the Boost Channel lowers quiescent accepted to alone 30uA, accouterment continued array run-time in handheld applications. For lower babble operation, the Burst Mode affection can be disabled. Other appearance cover Power Good indicators for both channels, a low array comparator and thermal afflict protection. The aggregate of its top switching abundance and 3mm x 3mm QFN amalgamation provides a actual bunched band-aid for bifold abuse handheld applications. LTC3537EUD is accessible from banal in a 16-lead 3mm x 3mm QFN package.

Summary of Features: LTC3537

High Efficiency Step-Up DC/DC Converter
•VIN: 0.68V to 5V, VOUT: 1.5V to 5.25V
•IOUT: 100mA at 3.3V, VIN >0.8V
•2.2 MHz Fixed Frequency Operation
•Synchronous Rectifier with Output Disconnect
•Burst Mode Operation (Pin Selectable)
Linear LDO Regulator
•VIN: 1.8V to 5.5V, VOUT: 0.6V to 5.5V
•IOUT: 100mA
•100mV Dropout Voltage at 50mA
•24dB Ripple Rejection at fSW
Combined
•Power Good Indicators
•Low-Battery Comparator
•IQ= 30uA
•Low Profile 3mm × 3mm × 0.75mm Package

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.

LT, LTC, LTM, Burst Mode and are registered trademarks and uModule is a brand of Linear Technology Corp.