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Hi,
I need an ultra small step-up circuit from around 1.8-2.5V to 3.3V for supplying the AFE4405 Rx and Tx supply.
I expect to use the TPS610994 fixed 3.3V supply.
Operating the TPS610994 in this setup means it will be under almost no load (<0.3mA) most of the time. At 25-100Hz it will see a <10mA pulse of approximately 500us.
My question is:
Can i go for a smaller inductor than the 2.2uH recommended in the datasheet for >3V output voltage
Should i go for another device?
How much can i reduce in/output caps?
Can i do more to decrease size for my use-case, as size is of high importance.
If a similar thread exists, please point me in the right direction.
Thanks :)
Thanks for the prompt reply :)
Can I reduce the inductance to e.g. 1uH, to get a smaller inductor, or will stability suffer?
My problem is to estimate how much I can reduce the capacitor size. From transient plots it seems that the control acts fast, so I don't seem to need to take transients that much into account, correct? At the moment, I don't expect ripple from normal operation to be a problem for the AFE4405.
EVM may be a good idea to look into :)
Thanks