identify Linear Technologies chips

Linear Technologies [PCI vendor ID]
Linear Technology Corp

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LTC1553
LTC1553LCSW
 
       
         
LTC1430 Voltage regulator, 5.0V in, up to 4.0V out, 10A current limit
LTC1553 Voltage regulator, 5.0V in, 1.8 - 3.5V out, 10A current limit