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TPS54332's function of no load (0A) condition

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Please teach us TPS54332.

Customer tried to check TPS54332's function on their board.

Their setting of Vin/Vout is following.

Vin :5.2V

Vout :1.18V

When no load condition of output(0A), customer confirmed that Vout is 1.4V.

But, when they increased load of output(several mA), Vout was 1.18V correctly.

1.4V no load

1.18V several load

In the case of no load, will the situation that the Vout rises 220mV  from correct value (1.18V) be within a normal range?

If this case is normal range, If this situation is normal, please teach Vout maximum ripple level at no load condition to us.

Because in the no load situation, internal switching was discontinuous, we guess that the output voltage was rippled.


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