SBVA094A February   2025  – July 2025 TPS7A21

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Oscilloscope Basics
  5. 2Implications of Parasitics
  6. 3Common Oscilloscope Issues
    1. 3.1 Choosing an Oscilloscope Probe
    2. 3.2 Sufficient Sampling
    3. 3.3 Visualization
    4. 3.4 Measuring Currents Using Current Probes
    5. 3.5 Bandwidth Limiting and Averaging
  7. 4Parasitic Effects on Common Measurements
    1. 4.1 Load Transients
    2. 4.2 Power Supply Rejection Ratio
    3. 4.3 Output Noise Voltage
  8. 5Summary
  9. 6References
  10. 7Revision History

Abstract

This application note details the best practices for capturing quality measurements of Low Dropout (LDO) regulators. This document highlights measurements including line and load transients as well as additional information regarding proper oscilloscope setup.