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PSoC 5, 3 & 1 MCU

LeYu_281131
New Contributor

I try to use Charge Pump that can get in the Paper(AN60580)

   

but there is no spec of current.

   

so i ask to you, How much current does Charge Pump supply?

   

SIO sink current is 25mA, therefore maybe 25mA is maximum current.

   

is it true?

   

And if you know, how increse maximum current, please reply.

   

Thank you.

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Anonymous
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Hello there ! Thats an interesting question. Generally chargepumps are used to set reference voltages or used as level shifters and they are not used drive loads and hence it is not use case of charge pump to be used as current drive. As you keep drawing current from the load capacitor, the source(in our case SIO) should be capable of charging the capacitor back to maintian your required voltage. You could approximate the current capability of the charge pump built on the SIO to be about 12mA, since the current source(actual SIO pin)  is now available for only half the time. Actually its even lesser than 12mA. 

   

Fret not !!! If you need additional current, you can connect more number of Pins in paralle.

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LeYu_281131
New Contributor

Thank you for your reply.

   

It is very helpful to me.

   

Thank you again.

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Anonymous
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Good question,

   

and thanks for the answer U2.. Even I was curious about the same..

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Anonymous
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thanks for the answer from  U2,

   

i know that  is 12ma  max  and generally  it  used as voltage reference

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