Buck regulator is 105 V input-capable

-August 06, 2017

An input range of 4.4 V to 105 V enables Linear Technology’s LTC7103 regulator to operate from a continuously high-voltage input source or an input that experiences high-voltage surges, eliminating the need for external surge suppressors. The synchronous step-down switching regulator also integrates internal power switches that deliver up to 2.3 A of continuous output current. These features make the device useful for 48 V automotive, 36 V to 72 V telecom, avionics, and military applications.

Reducing EMI/EMC emissions to very low levels, the LTC7103 easily passes CISPR25, Class 5 limits without sacrificing efficiency. The regulator achieves efficiencies of up to 96% when regulating a 12 V output and over 90% when regulating a 3.3 V output. Switching frequency can be set between 200 kHz and 2 MHz or synchronized anywhere within this range using the LTC7103’s internal phase-locked loop.

The part draws 2 µA of input quiescent current when regulating the output voltage at no load, extending battery operating life in always-on applications. Other features include a minimum on-time of 40 ns, a maximum duty cycle of 100%, and eight pin-selectable fixed output-voltage set points that include commonly used rails from 1.2 V to 15 V.

Housed in a 5×6-mm QFN package, the LTC7103 is offered in three temperature versions: -40°C to +125°C, -40°C to +150°C, and -55°C to +150°C. Prices start at $4.50 each in lots of 1000 units. All versions are available from stock.

LTC7103 product page

Linear Technology, www.linear.com

Find more datasheets on products like this one at Datasheets.com, searchable by category, part #, description, manufacturer, and more.

Loading comments...

Write a Comment

To comment please Log In