SLVSCD6A December 2015 – January 2021 TPS62097
The device offers a low input to output voltage dropout by entering 100% duty cycle mode when the input voltage reaches the level of the output voltage. In this mode, the high-side MOSFET switch is constantly turned on and the low-side MOSFET is switched off. The minimum input voltage to maintain output regulation, depending on the load current and output voltage, is calculated as:
When the device operates close to 100% duty cycle mode, the TPS62097 cannot enter Power Save Mode regardless of the load current if the input voltage decreases to typically 15% above the output voltage. The device maintains output regulation in PWM mode.