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可调电压的DCDC咨询

Other Parts Discussed in Thread: TPS562201, TPS562208, TPS65270, LM10010

  电源设计要求,  适配器输入12V电源,  系统需要有 1.2V,  1.8V ,  3.3V  5V,   几种电压规格,   有没有性价比好的一款芯片,

通过调整比例电阻来实现这几种电压的输出.      是否需要两极DCDC来实现,  一级为 12V转5V,  二级为5V转 1.2V, 1.8V, 3.3V