Hi, We use lots of Analog Devices products today and would like to keep the number of suppliers as low as possible. I need help to find the best efficiency switching regulator with integrated FETs. We have a Vin 5.0V and need 3.3V 1A.

I would recommend you to use Analog Devices ADIsimPower tools to help you find the highest performance switching regulator solution for your requirement. Used the following link: http://designtools.analog.com/dtPowerWeb/dtPowerMain.aspx .

You will start to enter Vin (min and max) , Vout , Iout you will also have the possibility to select dual channel devices after this just press "find solution" and you will have ADI's solution for the Lowest cost, Smallest size, Least part count and Most efficient. With your requirements the ADP2118 will be the best match.