SLVSBC6C March 2013 – December 2019 TPS84A20
The TPS84A20 allows for a variety of applications by using the VIN and PVIN pins together or separately. The VIN voltage supplies the internal control circuits of the device. The PVIN voltage provides the input voltage to the power converter system.
If tied together, the input voltage for the VIN pin and the PVIN pin can range from 4.5 V to 17 V. If you are using the VIN pin separately from the PVIN pin, the VIN pin must be greater than 4.5 V, and the PVIN pin can range from as low as 2.95 V to 17 V. When operating from a split rail, it is recommended to supply VIN from 5 V to 12 V, for best performance. A voltage divider connected to the INH/UVLO pin can adjust either input voltage UVLO appropriately. See the Programmable Undervoltage Lockout (UVLO) section for more information.