Reference Design for a High-Input-Voltage, High-Output-Current Buck Controller Using the MAX15046

The reference design presents a schematic (Figure 1), bill of materials (Table 1), and performance characteristics (Figures 2–7). Key specifications of the MAX15046 are listed below.

Design Specifications and Setup:

• Input Voltage: 18V to 36V
• Output Voltage: 1.2V
• Output Current: 13.4A
• Output-Voltage Ripple: 12mVP-P
• Input-Voltage Ripple: 180mVP-P
• Switching Frequency: 250kHz
• Efficiency: 82% with VIN = 18V at 13.4A, 74% with VIN = 36V at 13.4A