Its adjustable soft-start ramp limits inrush current, which protects the backplane voltage from glitches. It also provides bilevel current protection for overcurrent (OC) and severe overcurrent (SOC) conditions. In the presence of overcurrent conditions, it provides a regulated current output for a programmed time before latching off. In addition, it responds to severe overcurrent or dead short faults within 100 ns.
The MAX8533 also features unique, adjustable overvoltage protection to protect itself and the downstream dc-dc controllers. An absolute maximum rating of 16V allows it to withstand inductive-kickback voltages during board removal. Two enable inputs, EN (logic enable) and LPEN (local-power enable) and a POK (power good) output, provide flexible sequencing.
The MAX8533EUB is available in a 10-pin microMAX package—50% smaller than competing packages—and is specified for the extended-industrial temperature range (-40°C to 85°C).
For more information, visit www.maxim-ic.com.