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Sequencing with the MAX16046 system-management IC

Posted: 26 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MAX16046 implementation? system management IC? voltage rails?

Modern electronic devices have complex power requirements involving multiple voltage rails. Power must be supplied for I/O voltages; CPU, ASIC and FPGA core voltages; PLL voltages; and memory-termination voltages. Other devices need high-voltage, high-current or low-noise power supplies for applications like radio transceivers, ultrasonic transducers and LCD or plasma displays.

Designs using multiple power supplies require the designer to pay close attention to power sequencing. Each power supply rail must be turned on in a specific order to avoid forward-biasing protection diodes within complex multivoltage ICs. If the power supplies are simply turned on simultaneously, the ICs could suffer reliability problems or even latchup.

In addition to power sequencing, some systems implement margining. Voltage margining is a way of controlling the power-supply voltages to fully exercise the corners of all the tolerances and ensure system reliability. Maxim offers several solutions for power management. This application note focuses on the MAX16046, which sequences, monitors and margins up to 12 power rails.

View the PDF document for more information.

Click here to view related datasheets.

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