This reference design is a power module that converts 4.5 V to 15 V to dual 6-A outputs at 1.8 V and 1.2 V. The design uses a highly-integrated TPSM5D1806 buck power module with a second stage pi filter to minimize output voltage ripple to less than 5 mV. Three configurations for the 1.8-V output rail are evaluated in this test report. Configuration A is fully populated and produces the lowest output ripple. Configuration B has the minimum filtering components to achieve less than 5-mV output ripple. Configuration C has further had the second stage pi filter removed to demonstrate the impact on the output ripple.

• Independent dual 6-A outputs
• Less than 5-mV output voltage ripple
• 1-MHz switching frequency
• Frequency synchronization with phase delay
• Independent enable and power good for each output

• Mobile robot CPU and compute module
• Seeker front end
• Endoscope
• Global positioning system receiver
• Battery cell formation and test equipment
• Data acquisition (DAQ)
• Digital multimeter (DMM)
• Oscilloscopes and digitizers

Board A Top

Board C Top

Board B Top

Figure 1-1 Board A, B, C Bottom