DC to DC Power Supplies (Converters)
Step-Down DC/DC Converter draws 100 µA quiescent current.
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Press Release Summary:
Tested to junction temperature of 140°C, LT3437HFE switching regulator operates from continuous inputs of 3.3-60 V and withstands transients to 80 V. Its 500 mA internal switch delivers up to 400 mA continuous output current at voltages down to 1.25 V, and areas of use include automotive and telecom applications. Supplied in TSSOP-16E package, synchronizable product features Burst Mode® operation, 200 kHz switching frequency, and soft-start capability.
Original Press Release:
60V, 500mA (I(sw)) 200kHz Step-Down DC/DC Converter Draws Only 100uA Quiescent Current & Features a 140 Degrees Celsius Maximum Junction Temperature
MILPITAS, CA - 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.
Summary of Features: LT3437H
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
60V Step-Down DC/DC Converter with TJMAX = 140°C
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 and Burst Mode are registered trademarks of Linear Technology Corp.
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
