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Q: TPS62321 DC-DC converter and placing device into PWM mode. by 1621419
For the TPS62321 DC-DC converter, does using an external clock on the MODE/SYNC pin place the device into PWM mode or PFM mode?
A: Re: TPS62321 DC-DC converter and placing device into PWM mode. by 1090425
Yes, syncing the device to an external clock forces PWM operation: "During synchronization, the mode is set to fixed-frequency operation and the P-channel MOSFET turnon is synchronized to the falling edge of the external clock." page 16
Fixed frequency means no power save mode. This is why you sync--you want your noise to be low at a specific frequency. This is not the case with power save mode.
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