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TPS60300 - Can C1 and C1out be left out of the circuit if customer only needs 3.3volt output?

Leslie Chataway
Mastermind 20980 points

Question/Problem:

Can C1 and C1out be left out of the circuit if customer only needs 3.3volt output?

Answer:

The converters are internally cascaded.  All capacitors must be present to obtain 3.3volts at the output of converter 2.

  • 0
    TI__Genius 17240 points

    This is true, C1F, C2F, C(OUT1) and C(OUT2) must all be present for the 3.3V regulated output (OUT2) to operate. 

    However, unlike OUT2, OUT1 can operate with only C1F and C(OUT1); (i.e. without C2F and C(OUT2) present). 

    The cascading is visible in the block diagram below (from the datasheet):