MAX5073 Dual Buck Converter Reference Design Operating at 2MHz Switching Frequency

This article provides a detailed reference design using the MAX5073 dual-channel buck converter operating at a switching frequency of 2MHz. This design can be used in applications where board space is limited because the higher switching frequency allows for smaller size passive components. In addition, this power solution can be used in automotive electronics (with load dump protection), that is, products that require switching frequencies outside the AM frequency modulation band. For example, car dashboards and infotainment systems.
The key specifications of this reference design are listed below, along with the detailed schematic ( Figure 1 ) and bill of materials ( Table 1 ) required for the application.

Specification

• Input voltage: 5.5V to 16V

• 1st converter output voltage = 3.3V/2A (maximum value)

• 2nd converter output voltage = 2.5V/1A (maximum)

• Switching frequency of each converter (f _SW ) = 2MHz

• Ambient temperature (TA) = -40°C to +85°C

Detailed Circuit Diagram  (PDF)
Figure 1. MAX5073 Reference Design