We have a question about TLV62568.
Please tell us the threshold current that PWM mode changes to PFM mode.
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the transition depends on the LC network connected to the switch node and on the Vin to Vout ratio.
Those parameters define at which output current the inductor current reaches zero between the switching cycles. This is the point on which the TLV62568 will transit from PWM to PFM mode. For this device, the transition happens typically between about 0.1A and 0.2A.
To get a more concrete value, you can use e.g. our Webench power designer to simulate your design with your operating parameters.