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TPS2061 TPS2049 output capacitor high value electrolytic or ceramic

lech lachowicz
Prodigy 70 points
Other Parts Discussed in Thread: TPS2061

Is it necessary to have an electrolytic on the output? The output of the TPS2061 will power a radio with a 700mA transmit current rating.  Can a 22 uF ceramic be used instead of a electrolytic?

  • 0
    TI__Expert 7990 points

    The usual 120Uf or larger on the output is to assist in meeting USB standards requirements.  Output capacitance is not required for the TPS2061 to operate properly.

    Proper design of a hotswap system is still required, the load must consider that it is being operated from a current-limited source.    If the radio has a large peak/average current profile, filtering and current limit should keep the hotswap from creeping in and out of current limit to: 1)  permit startup, 2)  Avoid excessive heat in the hotswap, 3)  not interfere with proper operation of the OC flag.