Power Switch IC for Express Card

The R5538 is the power interface switch IC for single slot ExpressCard and realizes the total power management function required by ExpressCard. The R5538 distributes 3.3V, 3.3Vaux, and 1.5V to the ExpressCard socket. Each voltage line is protected with a built-in current limit circuit and a thermal shutdown circuit in the R5538.

Meets the Express Card TM Standard
Built-in Over-current Limit
Built-in Clock Enable Function
With 3.3VIN and 3.3V AUXIN Sequence
Package QFN-20

  • Express Card

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