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DC/DC Converter features 140°C max junction temperature.

August 18, 2005 - Burst Mode step-down switching regulator, Model LT1976, maintains quiescent current under 100 µA. H-Grade unit operates within VIN range of 3.3–60 V, making it suited for load dump or cold-crank conditions found in automotive applications. Rated at 1.5 A, internal switch delivers up to 1.25 A of continuous output current at voltages as low as 1.25 V. Housed in 16-pin, thermally enhanced TSSOP package, unit features 200 kHz switching frequency and soft-start capability.

Related categories: Electrical Equipment and Systems | Electronic Components and Devices

Archive Press Release
(Products mentioned in this Archive Press Release may or may not be available from the manufacturer.)

Release date: August 1, 2005

60V, 1.4A (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.

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.

LT, LTC and Burst Mode are registered trademarks of Linear Technology Corp.

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

Contacts:

Marketing:
Doug Dickinson
USA
Phone: 408-432-1900 ext 2233

E-mail this person

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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