Voltage Regulator Application Note
Dual Voltage Regulator
There are single input type and dual input type in dual voltage regulators.
The single input type has one shared input pin for both voltage regulators. The single input type provides a small package due to the reduction of the number of pins. However, if the difference between the input voltage and the output voltage is large, since the input voltage of both voltage regulators is same voltage, the energy loss and the power dissipation becomes large.
Single input type