SLYA094 August   2025 LM5137F-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Design with LM5137F-Q1
    1. 2.1 Schematic
  6. 3PMP41158 Performance Curves
    1. 3.1 Four-Phase Interleaving
    2. 3.2 Thermal Performance
    3. 3.3 Load Transient
    4. 3.4 Light Load Efficiency
    5. 3.5 Bode Plot
  7. 4Reference Design Modification Conversion From 48V to 12V
  8. 5Summary
  9. 6References

Abstract

Automotive systems continue to integrate, this includes advanced driver assistance systems (ADAS). The result of system integration is the need for more power including the need for higher levels of functional safety. As power is consolidated into a single point of load meeting efficiency, thermal, ripple voltage and transient specifications become more challenging. Reference design PMP41158 is a four-phase interleaved buck using the LM5137F-Q1 which addresses the mentioned challenge. This application note reviews the reference design and features, in addition to key performance metrics.

The hardware presented herein can be modified for 48V input rail converting to a 12V output rail.