SNVA869 November   2020 LP875761-Q1

 

  1.   Trademarks
  2. 1Design Parameters
  3. 2Power Solution
  4. 3Schematic
  5. 4Layout
    1. 4.1 Layout Considerations
    2. 4.2 Example Layout
  6. 5Recommended External Components
  7. 6Measurements
  8. 7Conclusion
  9. 8References

7 Conclusion

With this presented solution with LP875761-Q1 the output voltage accuracy requirement is met for EyeQ4 High application processor while maintaining good efficiency. Phase margin is over 50° in all measured conditions which shows good stability of the control loop. Table 7-1 shows combined data for the critical parameters.

Table 7-1 Results
ParameterResultComment
DC output voltage accuracy, includes voltage reference, DC load and line regulations, process, and temperature effectWithin ±10 mV±1.0% with 1 V output voltage
Transient load step response 4 A to 12 A to 4 A. 8 A/µsWithin ±20 mV±2% with 1 V output voltage
Total accuracy including DC + transientWithin ±30 mV±3% with 1 V output voltage
Efficiency88% at 4 A load, VIN = 3.3 V
Phase margin50 – 64° depending on condition>45° is considered good design target
Gain margin13 – 19 dB depending on condition>10 dB is considered as good design target
Bandwidth114 – 294 kHz depending on condition