L6730

STEVAL-ISA025V1 Step-down DC-DC converter at 3.3 Vout/20 A and switching frequency of 400 kHz evaluation board based on L6730 Data Brief Features Input voltage, Vin: 4.5 to 14 V Output voltage: 3.3 V Selectable switching frequency Overvoltage protection Thermal shut-down Description This 4-layer PCB demoboard implements a step- down DC/DC converter and shows the operation of the L6730 device in a general-purpose application. The input voltage can range from 4.5 V to 14 V and the output voltage is 3.3 V. The module can deliver an output current in excess of STEVAL-ISA025V1 30 A. The switching frequency is set at 400 kHz (controller free-running FSW), but it can be increased up to 1 MHz. A 7-position dip-switch selects the UVLO threshold (5 V or 12 V bus), the OVP intervention mode and the sink-mode current capability. August 2007 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Board schematic STEVAL-ISA025V1 1 Board schematic Figure 1. Scheme 2/4