SLVA289C January   2008  – September 2026 TPS61000 , TPS61002 , TPS61005 , TPS61006 , TPS61007 , TPS61010 , TPS61012 , TPS61013 , TPS61014 , TPS61015 , TPS61020 , TPS61024 , TPS61025 , TPS61026 , TPS61027 , TPS61028 , TPS61029 , TPS61030 , TPS61031 , TPS61032 , TPS61040 , TPS61040-Q1 , TPS61041 , TPS61041-Q1 , TPS61042 , TPS61043 , TPS61045 , TPS61050 , TPS61052 , TPS61054 , TPS61055 , TPS61060 , TPS61061 , TPS61062 , TPS61070 , TPS61071 , TPS61072 , TPS61073 , TPS61090 , TPS61091 , TPS61092 , TPS61100 , TPS61107 , TPS61120 , TPS61121 , TPS61122 , TPS61130 , TPS61131 , TPS61140 , TPS61141 , TPS61150 , TPS61151 , TPS61160 , TPS61161 , TPS61165 , TPS61170 , TPS61180 , TPS61181 , TPS61182 , TPS61200 , TPS61201 , TPS61202 , TPS62000 , TPS62002 , TPS62003 , TPS62004 , TPS62005 , TPS62006 , TPS62007 , TPS62008 , TPS62020 , TPS62021 , TPS62026 , TPS62040 , TPS62042 , TPS62043 , TPS62044 , TPS62046 , TPS62050 , TPS62051 , TPS62054 , TPS62056 , TPS62060 , TPS62065 , TPS62067 , TPS62100 , TPS62101 , TPS62102 , TPS62103 , TPS62110 , TPS62110-EP , TPS62111 , TPS62112 , TPS62112-EP , TPS62113 , TPS62200 , TPS62201 , TPS62202 , TPS62203 , TPS62204 , TPS62205 , TPS62207 , TPS62208 , TPS62220 , TPS62221 , TPS62222 , TPS62223 , TPS62224 , TPS62227 , TPS62228 , TPS62240 , TPS62242 , TPS62243 , TPS62260 , TPS62261 , TPS62262 , TPS62270 , TPS62290 , TPS62293 , TPS62300 , TPS62301 , TPS62302 , TPS62303 , TPS62304 , TPS62305 , TPS62320 , TPS62321 , TPS62350 , TPS62352 , TPS62353 , TPS62354 , TPS62355 , TPS62356 , TPS62400 , TPS62401 , TPS62402 , TPS62403 , TPS62410 , TPS62420 , TPS62421 , TPS62510 , TPS62560 , TPS62700 , TPS65090

 

  1.   1
  2.   Optimizing Transient Response of Internally Compensated dc-dc Converters With Feedforward Capacitor
  3. 1Introduction
  4. 2Feedback Network With and Without the Feedforward Capacitor
    1. 2.1 Feedforward Capacitor Value Optimization Process
    2. 2.2 Determining the Crossover Frequency
    3. 2.3 Determining the Crossover Frequency Using Frequency Analysis
    4. 2.4 Calculating the Feedforward Capacitor for Optimum Loop Response
    5. 2.5 Improvement
    6. 2.6 Optimizing Toward a Faster Loop At the Expense of Less Phase Margin
    7. 2.7 Optimizing Toward Greater Phase Margin for Less Ringing
  5. 3Conclusion
  6. 4References
  7. 5Revision History

Abstract

This application report describes how to choose the feedforward capacitor value (Cff) of internally compensated dc-dc power supplies to achieve optimum transient response. The described procedure in this application report provides guidance in optimizing transient response by increasing converter bandwidth while retaining acceptable phase margin. This document is intended for all power supply designers who want to optimize the transient response of a working, internally compensated dc-dc converter.