Smallest, Most Reliable, 12V, InfiniBand-Compliant Hot-Swap Controller

The MAX8533 is a single-port, 12V, InfiniBand®-compliant (IB) versatile hot-swap controller. The device can be implemented in both IB Class I (nonisolated) and Class II (isolated) power-topology applications. Additionally, the MAX8533 can be used as a reliable power controller on hot-swappable blade servers, RAID cards, and network switches or routers that are powered from a 12V bus.

The MAX8533 integrates several features that allow reliable insertion and removal of the circuit card, as well as real-time monitoring of abnormal occurrences. The MAX8533 allows for an adjustable soft-start ramp during turn-on of the input voltage, while providing overcurrent protection. It also provides accurate and consistent current-regulated outputs for a programmable period of time to latch off and soft-start in the presence of overcurrent conditions (OC). Additionally, it provides a second level of severe overcurrent (SOC) protection by responding to a dead short in 100ns. The MAX8533 also includes adjustable overvoltage protection.

The MAX8533 incorporates undervoltage lockout (UVLO) and a power-good (POK) signal to the DC-to-DC converters to confirm the status of output voltage rails during operation. Two enable inputs EN (logic enable) and LPEN (local power enable) provide flexible sequencing. The MAX8533 is specified across the extended temperature range and has an absolute maximum rating of 16V to withstand inductive kickback during board removal.

The MAX8533 is available in the space-saving 10-pin µMAX package.

Applications

* 12V Hot-Swap * Blade Servers * Hot-Swap/Plug/Dock Power Management * InfiniBand® Bulk Power * Network Routers and Switches * RAID

* 12V Hot-Swap Controller for 25W or 50W InfiniBand Ports

* Programmable Overcurrent Protection Regulation Level

* EN and LPEN Inputs for Flexible Sequencing

* Power-Good Signal

* 16V Absolute Maximum Rating Withstands Inductive Kickbacks

* Soft-Start Overcurrent Protection During Turn-On

* Timed Current Regulation Period (Adjustable)

* 100ns IC Response Time to Output Dead Short

* Adjustable Overvoltage Protection

* Undervoltage Lockout

* Adjustable Turn-On Ramp