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ADP160 drop out not meeting specs when testing EVAL board

Question asked by Lionelwallace Employee on Jan 15, 2014
Latest reply on Jan 15, 2014 by LucaV

I recieved this question from a customer that is testing the ADP160UJZ-REDYKIT

 

 

I installed the 2.8V regulator (that was what all the bags were about – the different voltage value regulators – needed to install your own).

The board comes up and runs – quiescent current hits the numbers. This is the big plus we were hoping for,

 

But when I apply 3.3 V and use a load of 70mA (40 ohm resistor) the output voltage drops from 2.8V to 2.6V (current sourced drops accordingly).

When I place a 100mA load (for a 2.8V source) the output voltage drops to 2.4V.

So I don’t see the 150mA load handling at all.

 

Next:

When I have a 50mA (not 150) load and lower the input voltage to 3V the output drops to 2.5. What happened to the 0.2V dropout spec’d at 150mA??? Doesn’t even hold at 50mA.

 

Not sure if it is me or what but I do not see this part meeting its spec. Tell me if I am flat out bungling this.

 

Any Ideas?

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