Texas Instruments TPS54040: Is the TPS54040 capable of 100% Duty operation?
power
switching regulator
The TPS54040 is capable of 100% duty cycle operation as long as the voltage between the BOOT-PH pins is 2.1V or higher. If the operating conditions are such that the input/output voltage difference is small, make sure that the voltage between BOOT-PH is 2.1V or more.
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