Santa Clara, Calif.—National Semiconductor says its synchronous buck controller, the LM1770, is the industry’s first in an SOT-23 package.
The LM1770, for set top boxes, cable modems, digital video recorders, and printers, provides low-voltage (down to 0.8 volt) point-of-load regulation from standard 3.3- and 5-volt rails. It's designed to replace traditional switching regulators and LDOs in enterprise server and point-of-sale applications with a high-efficiency alternative that takes very little space. Its constant on-time control topology contributes to its space savings; no external compensating components are required.
Features include internal soft-start to limit in-rush current, short-circuit protection, and three on-time options, which allow for selection of operating frequency range.
For the datasheet, visit
www.national.com/pf/LM/LM1770.html. Available now, the LM1770 is priced at 95 cents in 1k quantities.
National Semiconductor, 1-800-272-9959, www.national.com