The TPS22997 device is designed to operate with a VIN range of 0.1 V to 5.5 V. Regulate the VIN power supply well. The power supply must be able to withstand all transient load current steps. In most situations, using an input capacitance (C_IN) of 1 μF is sufficient to prevent the supply voltage from dipping when the switch is turned on. In cases where the power supply is slow to respond to a large transient current or large load current step, additional bulk capacitance can be required on the input.

A capacitor (C_BIAS) is recommended to be placed as close to the device as possible to stabilize the supply and filter our low frequency noise.