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

2 Hardware Design with LM5137F-Q1

The LM5137F-Q1 is an 80V, dual-channel, buck controller offered from a family with three options for functional safety: Capable, ASIL B, or ASIL D. The device uses an interleaved, stackable, peak current mode architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for high output current. A high-side switch minimum on-time of 22ns facilitates large step-down ratios, enabling the direct conversion from 12V, 24V, or 48V automotive inputs to low-voltage rails for reduced system design cost and complexity. The LM5137F-Q1 continues operating during input voltage dips as low as 4V, at 100% duty cycle if needed.