Power-supply controller simplifies tracking for distributed loads - Embedded.com

Power-supply controller simplifies tracking for distributed loads


Linear Technology recently introduced the LTC2927, a single power supply tracking controller that simplifies the tracking and sequencing requirements of complex distributed power architectures. Housed in an 8-lead SOT-23 or 3- by 2-mm DFN package, the compact device can be conveniently placed at the point of load. By minimizing the trace length to the sensitive feedback node of a dc-to-dc converter, the LTC2927 effectively 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 various power (supply) profiles for digital logic circuits during power up as well as power down. Thus, the LTC2927 is suited for systems utilizing FPGAs, CPLDs, or DSPs. Specified over the commercial and industrial temperature grades, prices begin at $1.55 each for 1000-piece quantities. For more information, go to www.linear.com.

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