The TPS61098x works in Active mode when MODE pin is logic high. In Active mode, both of the boost converter and the integrated LDO/load switch are enabled, and the TPS61098x can provide dual outputs simultaneously. The transient response performance of the boost converter is enhanced in Active mode, and the device consumes around 15 µA quiescent current. It is able to respond load transient quickly.

When MODE pin is toggled from low to high, soft-start is implemented for the LDO versions to avoid inrush current during startup. For load switch versions, the load switch is turned on faster, so the output capacitor at VSUB pin is suggested 10X smaller than the output capacitor at VMAIN pin to avoid obvious voltage drop of V_(MAIN) during turning on process.