Low Iq is a key spec for the applications where the device is operated in standby or shutdown mode for the majority of the time, so they are not drawing unnecessary power while not in use. For battery powered applications, the quiescent current is critical to extending the life of the battery and improves light load efficiency. The TPS621x0 has low quiescent current of 17uA. The TPS6290x quiescent current is reduced even further to 4uA. The battery in these applications are meant to last an extended amount of time without having to be replaced. The reduction of the Iq by 76% will reduce the amount of current being drawn from the battery, therefore extending the battery life significantly.