The TPS7H5001-SP EVM uses the TPS7H5001-SP and LMG1210 to create a synchronous buck converter to bring the 12-V intermediate rail into a 1-V rail at high current for core voltage rails of space grade FPGAs.
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The TPS7H5001-SP EVM uses the TPS7H5001-SP and LMG1210 to create a synchronous buck converter to bring the 12-V intermediate rail into a 1-V rail at 20-A for core voltage rails of space grade FPGAs. The limiter of the output current in the design is the bottom side GaN FET heat. The output current of this design can be increased by adding a second GaN FET in parallel on the bottom side in order to achieve higher than 20-A of output current. Due to the roughly 150-mA peak current capability of the TPS7H5001’s primary switching outputs, the LMG1210 gate driver is used to amplify the current to provide the FET’s of the synchronous buck with sufficient drive. These outputs are not dependent on the TPS7H5001-SP itself, and can be increased or decreased depending on the design.