SBVS068I February 2006 – January 2016 TPS717
The TPS717 is designed to operate from an input voltage between 2.5 V and 6.5 V. The input supply must provide adequate headroom for the device to operate in a normal mode of operation.
Connect a low output impedance power supply directly to the IN pin of the TPS717. Inductive impedances between the input supply and the IN pin can create significant voltage excursions at the IN pin during startup or load transient events. If inductive impedances are unavoidable, use an input capacitor. To increase the overall PSRR of the power solution, use a pi-filter before the input of the LDO or after the feedback network of the LDO.