Like linear regulators, most buck converters need a minimum drop-out, typically 1-2V. So for 5V output you need 6-7V or more on the input.
There are buck/boost converters which can take both higher and lower voltages on the input.
Like linear regulators, most buck converters need a minimum drop-out, typically 1-2V. So for 5V output you need 6-7V or more on the input.
There are buck/boost converters which can take both higher and lower voltages on the input.