??????????????
????USB???????5V????????±5V??100mA;????3.3V??100mA??????1.2V??500mA????·??????????????磬?????USB????????????硣
??????????
???????????????????????о?????????????????????????±5V??????????Ч??????????????DC/DC?任??????????????????LDO???????3.3V??????????LDO?????????1.2V?????????????Ч???????????DC/DC??????????????????????????????????????С?
??????????о????LT?????LTC4055EUF????
????· ?????? USB ?????????????????
????· ??????????????????????л????????
????· ????? 100mA/500mA ???????
???????????????????????????Χ??????????????????
????±5V DC/DC??????? 1.3A??1.2MHz ???/??????????LT3471????????Χ??2.4V ?? 16V??
??????? 3.3V ?????? 5V/630mA ???
??????? 5V ?????? 12V/320mA ???
??????? 5V ?????? -12V/200mA ???
?????????????????????5V?????????±7V??
???????7V??5V??LDO???AMS1117??-7V??-5V??LDO???79L05
????3.3V  LDO???LT1762
????1.2V????DC/DC???MCP1603
????????????????

????????о??????????м????????????￡?