升压控制器形式负降压调节器

摘要：本应用程序说明演示如何形成负降压开关稳压器从升压开关控制器、使用MAX1771，高效率、升压的直流-直流控制器在脉冲频率调制（PFM）模式下运行。Maxim>Designsupport>Appnotes>Automotive>APP945Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP945Keywords:stepdownregulator,PWM,PFM,negativestep-downregulator,DC-DC,dc-dcJan31,2002APPLICATIONNOTE945Step-UpControllerFormsNegativeStep-DownRegulatorAbstract:Thisapplicationnotedemonstrateshowtoformanegativestep-downswitchingregulatorfromastep-upswitchingcontroller,usingtheMAX1771,ahigh-efficiency,step-upDC-DCcontrolleroperatinginpulse-frequencymodulation(PFM)mode.AsimilarversionofthisarticleappearedintheSeptember6,1999issueofEETimesmagazine.Positivestep-downswitc