DC/DC Converter features 4.2-40 V input voltage range.
September 22, 2009 -
Model LT3970 step-down switching regulator includes Burst ModeŽ operation that keeps quiescent current under 2.5 ľA in no load standby conditions and keeps output ripple below 5 mVp-p. Unit features 550 mA switch delivering up to 350 mA of continuous output current to voltages as low as 1.21 V. Boost and catch Schottky diodes, oscillator, control, and logic circuitry are also included. Frequency is programmable from 200 kHz to 2.2 MHz.
Quiescent Current 2.5ľA, 40V, 350mA(IOUT), 2.2 MHz Step-Down DC/DC Converter
MILPITAS, CA - September 15, 2009 - Linear Technology Corporation announces the LT3970, a 350mA, 40V step-down switching regulator with integrated boost and catch diodes. Its Burst ModeŽ operation keeps quiescent current under 2.5ľA in no load standby conditions. The LT3970's 4.2V to 40V input voltage range makes it ideal for automotive and industrial applications. Its internal 550mA switch can deliver up to 350mA of continuous output current to voltages as low as 1.21V. The LT3970's Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive or industrial systems, which demand always-on operation and optimum battery life.
Switching frequency is user programmable from 200kHz to 2.2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3mm x 2mm DFN-10 (or MSOP) package and high switching frequency keeps external inductors and capacitors small, providing a very compact, thermally efficient footprint.
The LT3970 utilizes a high efficiency 550mA, 300mV switch, with the necessary boost and catch Schottky diodes, oscillator, control and logic circuitry integrated into a single die. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 5mVPK-PK. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range, and the LT3970's current mode topology enables fast transient response and excellent loop stability. Other features include a power good flag soft-start capability and output short protection.
The LT3970EDDB is packaged in a 2mm x 3mm DFN-10, and the LT3970EMS is packaged in a MSOP-10, priced starting at $2.35 and $2.40 each, respectively for 1,000 piece quantities. The LT3970IDDB and LT3970IMS are tested and guaranteed to operate from a -40şC to 125şC operating junction temperature and are priced at $2.61 and $2.67 each, respectively in 1,000 piece quantities. All versions are available from stock. For more information, visit www.linear.com.
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, ľModuleŽ products, 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.
LT, LTC, LTM, ľModule, Burst Mode and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
Worldwide Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
China (PRC)
Fanny Lau
Tel: 852-2428-0303
flau@linear.com
Angela Ao
Tel: (8610)6522 8081
angela.ao@ebacomms.com
Japan
Kazuto Takahashi
Tel: 81-3-5226-7291
ktakahashi@linear.com
Contacts:
General Information:
John Hamburger
USA
Phone: 408-432-1900 ext 2419 E-mail this person Company Information: Name: Linear Technology Corp. Address: 1630 McCarthy Blvd. City: Milpitas State: CA ZIP: 95035-7417 Country: USA Phone: 408-432-1900 FAX: 408-434-6441 http://www.linear-tech.com
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