Dual, 2.2MHz, Automotive Buck Or Boost Converter With 80V Load-Dump Protection

The MAX5098A is a dual-output, high-switching-frequen- cy DC-DC Converter with integrated n-channel switches that CAN be used either in high-side or low-side configura- tion. Each output CAN be configured either as a buck con- verter or a boost converter. In the buck configuration, this device delivers up to 2A from converter 1 and 1A from converter 2. The MAX5098A also integrates a load-dump protection circuitry that is capable of handling load-dump transients up to 80V for automotive applications. The load-dump protection circuit utilizes an internal charge- pump to drive the Gate of an external N-Channel MOSFET When an overvoltage or load-dump condition occurs, the series protection MOSFET absorbs the high voltage tran- sient to prevent damage to lower voltage components. By Maxim Integrated Products