This board provides 1.8VOUT and 0-8A from 8-20VIN at 500KHz switching frequency using low-cost ceramic output capacitors.

Board Configuration

•  Output Voltage: 1.8V
•  Output Current: 0-8A
• Input Voltage: 8-20V
• SW Frequency: 500KHz 

Power-Up Sequence
1. Establish connections to test equipment. Use suitable diameter wires and connectors to avoid excessive voltage drop or temperature rise.
Do not turn on power supplies until all the connections are complete.
2. Verify voltage sources have current limits adequately set to supply the load.
3. Apply VIN before VCC to avoid skipping the soft-start cycle.
4. Apply the desired load current. This can be done at any time, including before power-up, but it is recommended to power-up the first time with 0A load to verify proper connections. To power down, turn off the VCC (5V) supply first.

Schematic

Bill of Materials

Assembly Diagram

PCB Layout

Source: http://www.fairchildsemi.com