Power supply sequencing: high performance analog solutions from Linear Technology.(Advertisement)

EDN, October, 2003

The number of power supply rails within a system continues to expand. To avoid internal latch-up and potential damage to the processor or FPGA, the I/O and core voltage ramp-up sequence is strictly defined, The relationship between I/O and core voltages varies with the application. In a majority of applications, ramping up the supplies simultaneously (tracking) meets the requirement. Assuring the supplies turn on and off in the proper sequence can be a significant challenge depending on the arrangement of these supplies. If all supplies use the same input supply, then it may be simple. It becomes more complex if the output of one supply is the input to the next. Mixing power modules with switching and linear regulators further complicates the situation.

...

Read the rest of this article with a Free Trial at HighBeam Research.

Premium Content Partnership | HighBeam Research provides an in-depth online archive library of reference works.