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Power controller IC simplifies tracking, sequencing requirements

Posted: 29 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? ltc2927? power supply tracking controller? controller?

Linear Technology Corp. has released a single power-supply tracking controller that promises to simplify the tracking and sequencing requirements of complex distributed power architectures. Housed in an eight-lead SOT-23 or 3-by-2mm DFN package, the LTC2927 can be conveniently placed at the point of load. By minimizing the trace length to the sensitive feedback node of a dc-dc converter, this new product reduces losses caused by voltage drops and overcomes noise sensitivity and EMI issues.

The LTC2927 introduces current into the feedback node of an independent supply and causes its output to track another supply or master signal. A simple resistor configuration yields a ramp-up and ramp-down with differing ramp rates, voltage offsets or time delays relative to the master signal. This enables a variety of power (supply) profiles for digital logic circuits during power up as well as power down. Thus, the LTC2927 is designed for systems utilizing FPGAs, CPLDs or DSPs.

Specified over the commercial and industrial temperature grades and available from stock, pricing for the LTC2927 begins at $1.55 each for 1,000-piece quantities.

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