SLVSBV8E June 2013 – February 2020 LMZ31704
The LMZ31704 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 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 of this datasheet for more information.