IRDCIP1001-A

REFERENCE DESIGN International Rectifier IRDCiP1001-A • 233 Kansas Street, El Segundo, CA 90245 USA Overview IRDCiP1001-A, 200kHz, 20A, 3.3VIN to 4.5VIN Single Phase Synchronous Buck Converter using iP1001 In this document, Table 1 and Figure 1 are provided to enable engineers to easily evaluate the iP1001 in a single phase configuration that is capable of providing up to 20A in a lab environment without airflow. Figures 3, 4, 5 and 6 and the complete bill of materials in Table 2 are provided as a reference design to enable engineers to very quickly and easily design a single phase converter. In order to optimize this design to your specific requirements, refer to the iP1001 data sheet for guidelines on external component selection and user adjustable limits and specifications. Custom designs may require layout modifications. Demoboard Quick Start Guide Initial Settings: IRDCiP1001-A Demoboard Operatng Conditions Min Max VIN 3.3V 4.5V VOUT 0.925V 2.5V IOUT See Fig.1 The output is set to 2V, but can be adjusted from 0.925V to 2.0V by setting SW1 according to the VID codes provided in Table 1. The output voltage can also be adjusted to allow up to 2.5VOUT for 3.3VIN, by adding R3 & R4 with the DAC set to 2VOUT. Refer to equation 1 for R3 & R4 values. R4 should be removed for output voltages below 2V, and R3 should be set to zero ohms (see Table 2). The switching frequency is centered around 200kHz for