60V, 1.5A (Isw) 200kHz Step-Down DC/DC Converter with Only 100uA of Quiescent Current and a 140˚C Maximum Junction Temperature

LTC News for Immediate Release
For more information, tel. 408-432-1900
John Hamburger, Dir., Mkting Communications, ext. 2419
Doug Dickinson, Media Relations Mgr., ext. 2233
60V, 1.5A (Isw) 200kHz Step-Down DC/DC Converter with Only
100uA of Quiescent Current and a 140˚C Maximum
Junction Temperature
MILPITAS, CA – August 1, 2005 – Linear Technology Corporation announces the
“H-Grade” version of the LT1976. The LT1976 is a 60V(MAX), Burst Mode®, step-down
switching regulator that maintains quiescent current under 100uA.The “H” Grade version
operates up to a junction temperature of 140˚C, compared to the “E” and “I” Grade
versions’ 125˚C maximum junction temperature. The “H Grade” parts are both tested and
guaranteed to the maximum junction temperature of 140˚C. They are ideal for automotive
and industrial applications which are subjected to high ambient temperatures.
The LT1976 operates within a VIN range of 3.3V to 60V, making ideal for load
dump or cold-crank conditions found in automotive applications. Its 1.5A internal switch
can deliver up to 1.25A of continuous output current at voltages as low as 1.25V. Its
100uA of quiescent current is ideal for “always on” applications such as automotive
security systems which require a very long battery life.
The LT1976HFE is available from stock in a TSSOP-16E package. Pricing starts at
$4.85 each for 1,000 piece quantities.
60V, 1.4A (Isw) 200kHz Step-Down DC/DC Converter with only
100uA of Quiescent Current and a 140˚C Maximum Junction Temperature
Page 2
Summary of Features: LT1976H
Maximum Junction Temperature of 140˚C
Wide Input Range: 3.3V to 60V
1.5A Peak Switch Current
Burst Mode Operation: 100uA Quiescent Current
Low Shutdown Current: IQ <1uA
Power Good Flag with Programmable Threshold
Load Dump Protection to 60V
200kHz Switching Frequency
Saturating Switch Design: 0.2 Ohm On-Resistance
Peak Switch Current Maintained Over Full Duty Cycle Range
1.25V Feedback Reference Voltage
Easily Synchronizable
Soft-Start Capability
Small 16-Pin Thermally Enhanced TSSOP Package
COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a
manufacturer of high performance linear integrated circuits. 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, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417
[email protected]
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the
company’s web site: http://www.linear.com
Note: LT, LTC, Burst Mode and
are registered trademarks of Linear Technology Corp.