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TPS51200: 芯片输出异常,REFOUT只有500mV,VTT输出只有300mV

Part Number: TPS51200

TI工程师,您好,上图是51200和其负载电容的原理图,现在输出异常,查阅相关资料,去掉了C199,更换为22uF,去掉了C159和C202,现象依旧,请问可能的原因有哪些?

另外,我看到有些设计,VTT的终端电容,一端是0.75V,另外一端是1.5V,这是何故?

x 出现错误。请重试或与管理员联系。