34V, 2A (Isw), 2.8MHz Micropower Step-Down DC/DC Converter Offers 150°C Maximum Junction Temperature Operation

News Release ⎜ www.linear.com
34V, 2A (Isw), 2.8MHz Micropower Step-Down DC/DC Converter Offers
150˚C Maximum Junction Temperature Operation
MILPITAS, CA – August 20, 2008 – Linear Technology announces the H-Grade version of the
LT3481. The LT3481 is a 34V (36V(MAX)), BurstMode®, step-down switching regulator that
maintains quiescent current under 50uA.The “H” Grade version operates up to a junction
temperature of 150˚C, compared to the “E” and “I” Grade versions’ 125˚C maximum junction
temperature. All electrical specifications are identical for the E, I and H. The H Grade parts are
tested and guaranteed to the maximum junction temperature of 150˚C. They are ideal for
automotive, industrial and harsh environment applications that are subject to high ambient
The LT3481 operates within a VIN range of 3.3V to 34V(36VMAX), making ideal for load
dump or cold-crank conditions found in automotive applications. Its 3.2A internal switch
delivers up to 2A of continuous output current to voltages as low as 1.25V. Its 50uA of quiescent
current is ideal for “always on” applications such as automotive security systems, which require
a very long battery life.
The LT3481HDD is available from stock in a 10-lead 3mm x 3mm DFN package
whereas the LT3481HMSE is available in a thermally enhanced MSOP-10 package. Pricing for
both versions starts at $4.15 each for 1,000 piece quantities.
Photo Caption: 150˚C, 34V, 2A (IOUT), 2.8MHz Step-Down Switching Regulator with IQ<50uA
Summary of Features: LT3481H
Maximum Junction Temperature of 150˚C
Wide Input Range: 3.6V to 34V Operating, 36V Maximum
2A Maximum Output Current
Low Ripple Burst Mode Operation 50uA IQ at 12VIN to 3.3VOUT:
Output Ripple < 15mV
Adjustable Switching Frequency: 300kHz to 2.8MHz
34V, 2A (Isw), 2.8MHz Micropower Step-Down DC/DC Converter Offers
150˚C Maximum Junction Temperature Operation
page 2
Low Shutdown Current: IQ < 1uA
Integrated Boost Diode
Power Good Flag
Saturating Switch Design: 0.18 Ohm On-Resistance
1.265V Feedback Reference Voltage
Output Voltage: 1.265V to 20V
Soft-Start Capability
Synchronizable Between 275kHz to 475kHz
Small 10-Pin Thermally Enhanced MSOP & (3mm x 3mm) DFN Packages
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,
uModule™ 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. For more
information, visit www.linear.com.
LT, LTC, LTM, Burst Mode and
are registered trademarks and uModule is a trademark of Linear Technology
Corp. All other trademarks are the property of their respective owners.
Press Contacts:
John Hamburger, Director Marketing Communications
[email protected]
Tel 408-432-1900 ext 2419
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233