60V, 500mA (Isw) 200kHz Step-Down DC/DC Converter Draws only 100uA Quiescent Current & Features a 140°C Maximum Junction Temperature

News Release  www.linear.com
60V, 500mA (Isw) 200kHz Step-Down DC/DC Converter Draws only 100uA
Quiescent Current & Features a 140˚C Maximum Junction Temperature
MILPITAS, CA – April 18, 2007 – Linear Technology announces the H-Grade version of the
LT3437 step-down switching regulator. The device operates from continuous inputs of 3.3V to
60V and withstands transients up to 80V, making it ideal for automotive and telecom
applications. Its 500mA internal switch delivers up to 400mA of continuous output current at
voltages as low as 1.25V. Burst Mode® operation reduces no-load quiescent current to less than
100uA, maximizing battery run-time for always on applications.
The H Grade version is tested and guaranteed to a junction temperature of 140˚C,
compared to the E and I Grade versions, which are specified for 125˚C maximum junction
temperature. All electrical specifications are identical for the E-, I- and H-grade versions. The
LT3437 H-grade version is ideal for automotive and industrial applications which are subjected
to high ambient temperatures.
The LT3437HFE is available from stock in a TSSOP-16E package. Pricing starts at $3.00
each for 1,000 piece quantities.
Photo Caption: 60V Step-Down DC/DC Converter with TJMAX = 140°C
60V, 500mA (Isw) 200kHz Step-Down DC/DC Converter Draws only 100uA
Quiescent Current & Features a 140˚C Maximum Junction Temperature
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Summary of Features: LT3437H
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Wide Input Range: 3.3V to 60V
Transient Protection to 80V
500mA Peak Switch Current
Burst Mode® Operation: 100uA Quiescent Current
Low Shutdown Current: IQ < 1uA
Defeatable Burst Mode Operation
200kHz Switching Frequency
Saturating Switch Design: 0.8Ohm On-Resistance
Peak Switch Current Maintained Over Full Duty Cycle Range
1.25V Feedback Reference Voltage
Easily Synchronizable
Soft-Start Capability
Thermally Enhanced TSSOP-16E Package
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, 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 of Linear Technology Corp.
Press Contacts:
John Hamburger, Director Marketing Communications
[email protected]
Tel 408-432-1900 ext 2419
Doug Dickinson, Media Relations Manager
[email protected]
408-432-1900 ext 2233
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