AnsweredAssumed Answered

ADR3450, increase output capability

Question asked by zuzu on Feb 26, 2014
Latest reply on Feb 26, 2014 by harryh

Hello friends,

 

I need around 15-20mA stable 5.000V reference for powering A1301, a ratiometric hall sensor. Since the project has low budget, I choose ADR3450 and plan to increase output capability with something similar that shown in datasheet:

 

adr3450_boost.gif

I've done some simulation Multisim but since no support for ADR3450 spice model, I had to choose ADR3425, a 2.5V reference like this:

adr3450_simple.jpg

The question is: This circuit works also for 5V when powered from 5.5V supply? ADR itself has a very low dropout, but what about when boosting with NMOS? Can circuit be improved if necessarily?

 

Thanks very much in advance for comments.

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