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

3 Conclusion

The feedforward capacitor used in the feedback network improves the performance of internally compensated dc-dc converters. The respective data sheet describes how to generally size the feedforward capacitor for improved loop response. However, with measured response characteristics of a working design, the feedforward capacitor can be sized to facilitate an improved transient response. The calculated optimal Cff value can be increased or decreased to optimize the converters transient response for minimum voltage deviation or higher phase margin.