SNVU283B August   2013  – December 2021 LMZ31520 , LMZ31530

 

  1.   Trademarks
  2. 1Description
  3. 2Getting Started
  4. 3Test Point Descriptions
  5. 4Operation Notes
  6. 5Performance Data
  7. 6Schematic
  8. 7Bill of Materials
  9. 8PCB Layout
  10. 9Revision History

1 Description

The EVM features a LMZ31520 (20 A) or LMZ31530 (30 A), synchronous buck SIMPLE SWITCHER power module configured for operation with typical 5-V and 12-V input bus applications. The output voltage can be set to one of six popular values by using a configuration jumper. In similar fashion, the switching frequency can be set to one of four values with a jumper. The full 20-A/30-A rated output current can be supplied by the EVM. Input and output capacitors are included on the board to accommodate the entire range of input and output voltages. Monitoring test points are provided to allow the following:

  • Measurement of efficiency
  • Power dissipation
  • Input ripple
  • Output ripple
  • Line and load regulation
  • Transient response
Control test points are provided for use of the PWRGD and Inhibit features of the power module along with a selector for Eco-Mode or FCCM. The EVM uses a recommended PCB layout that maximizes thermal performance and minimizes output ripple and noise.