SLVA958B June   2021  – May 2022 LM2776 , LM27761 , LM27762 , LM3670 , LM3671 , LM3674 , LM7705 , TLV62065 , TLV62080 , TLV62084 , TLV62084A , TLV62085 , TLV62090 , TLV62095 , TLV62130 , TLV62130A , TLV62150 , TLV62565 , TLV62568 , TLV62569 , TLV62585 , TPS60400 , TPS60403 , TPS62065 , TPS62080 , TPS62085 , TPS62088 , TPS62090 , TPS62095 , TPS62097 , TPS62110 , TPS62120 , TPS62122 , TPS62125 , TPS62130 , TPS62130A , TPS62130A-Q1 , TPS62133 , TPS62135 , TPS62136 , TPS62140 , TPS62142 , TPS62143 , TPS62150 , TPS62160 , TPS62160-Q1 , TPS62162 , TPS62170 , TPS62170-Q1 , TPS62172 , TPS62173 , TPS62175 , TPS62177 , TPS62180 , TPS62200 , TPS62203 , TPS62230 , TPS62240 , TPS62260 , TPS62290 , TPS62400 , TPS62420 , TPS62480 , TPS62560 , TPS62730 , TPS62740 , TPS62742 , TPS62743 , TPS62745 , TPS62746 , TPS62748 , TPS62770 , TPS62800 , TPS62801 , TPS62802 , TPS62806 , TPS62807 , TPS62808 , TPS62821 , TPS62840 , TPS63700 , TPS63710 , TPS82084 , TPS82085 , TPS82130 , TPS82140 , TPS82150 , TPS82740A , TPS82740B , TPSM82480 , TPSM82810 , TPSM82813 , TPSM82816 , TPSM82821 , TPSM82822 , TPSM82864A , TPSM82866A

 

  1. 1 Abstract
    1.     Trademarks
  2. 1 Introduction
  3. 2 Summary Table
  4. 3 Fundamentals of Switchmode DC/DC Converters
  5. 4 Control – Mode Architecture
  6. 5 Design, Layout, and Manufacturing Support
  7. 6 Thermal Considerations
  8. 7 Low Noise and Controlling EMI
  9. 8 Device-Specific Technical Discussions
  10. 9 Calculation, Simulation, and Measurement Techniques
  11. 10DC/DC Converter Applications
  12. 11Revision History

9 Calculation, Simulation, and Measurement Techniques

This section presents an overview of techniques to perform accurate calculations, simulations and measurements of the performance of a low power DC/DC converter in an application.

Calculating Efficiency:SLVA390

This application report provides a step-by-step procedure for calculating buck converter efficiency and power dissipation at operating points not provided by the data sheet.

MOSFET Power Losses and How They Affect Power-Supply Efficiency:SLYT664

This article revisits some of the basic principles of power supplies and then addresses how MOSFETs—the power stage of any switching-voltage regulator—affect efficiency.

Output Ripple Voltage for Buck Switching Regulator:SLVA630

In this application report, the analytical model for the output voltage waveform and peak-to-peak ripple voltage for buck is derived. This model is validated against SPICE TINA-TI simulations.

Accurately Measuring Efficiency of Ultralow-IQ Devices:SLYT558

This article reviews the basics of measuring efficiency, discusses common mistakes in measuring the light-load efficiency of ultralow-IQ devices and demonstrates how to overcome them in order to get accurate efficiency measurements.

Performing Accurate PFM Mode Efficiency Measurements:SLVA236

This note describes guidelines that assist the user in acquiring accurate PFM mode efficiency measurements.

How to Measure the Loop Transfer Function of Power Supplies:SNVA364

This application report shows how to measure the critical points of a bode plot with only an audio generator (or simple signal generator) and an oscilloscope. The method is explained in an easy to follow step-by-step manner so that a power supply designer can start performing these measurements in a short amount of time.

Simplifying Stability Checks:SLVA381

This application report explains a method for verifying relative stability of a circuit by showing the relationship between phase margin in an AC loop response and ringing in a load-step analysis.

How to Measure the Control Loop of DCS-Control™ Devices:SLVA465

This application report reviews the basics of measuring control loops, and discusses the changes for the family of DCS-Control™ devices.

Loop Gain Reconstruction of a Step-Down Converter from Output Impedance Measurement:SLUAAI0

This application note explains how to achieve a stability analysis only by performing an output impedance measurement. This method is compared to the commonly used voltage injection method and then described step-by-step to enable power engineers to quickly start performing these measurements.

How to Measure Impedance of a Power Distribution Network of a DC-DC Converter:SLUAAI3

This application note explains how to measure the Power Distribution Network (PDN) impedance of a DC-DC converter with a 2-port shunt-through measurement, suitable for measuring down to milliohm impedances at very high frequency. The method can be reproduced in a short amount of time using common instruments available in most laboratories.

HS Load/Line Transient Jigs and App Rpt for Testing POL Regulators:SNOA895

This application note discusses good practice and fundamentals for transient analysis in the lab, and describes the construction of some improved transient test devices.

Measuring the Bode Plot of D-CAP™, D-CAP2™, and D-CAP3™ DC/DC Converters:SLUAAF4

The stability test is an important part of the evaluation of a DC/DC converter. If done properly, the Bode plot result can be a very quick and useful way to help you gauge the stability of the converter. In the absence of a theoretical analysis, use a network analyzer to measure the Bode plot and confirm the stability of the design.