Achieving　high　efficiency　over　a　wide　range　of　input　voltages　for　digital　signal　processing　modules　is　a　key　focus　in　integrated　electronic　system　applications.　This　paper　proposes　a　current-feedback　low-dropout　(LDO)　voltage　regulator　functioning　in　parallel　with　a　step-down　switched　capacitor　DC-DC　converter　to　implement　a　smart　power　management　in　180　nm　CMOS　technology.　The　proposed　switched　capacitor　DC-DC　converter　is　divided　into　four　cell　to　reduce　the　output　voltage　ripple.　The　smart　power　management　delivers　a　0.71　V　power　supply　with　an　efficiency　as　high　as　69.4%　while　maintaining　tolerable　ripple,　and　operates　over　a　wide　input　voltage　range　of　1.1　V-3.0　V　while　occupying　only　1.5　mm(2).　The　highest　value　of　ripple　is　only　14　mV.　Measurement　results　confirm　that　the　proposed　implementation　achieves　a　higher　efficiency　and　wider　input　voltage　range　than　conventional　implementations.