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UCD90160A: Configuring EVM

Expert 3180 points
Part Number: UCD90160A
Other Parts Discussed in Thread: UCD90124

Hi Team,

My customer asked the following question on getting started with the UCD90160A:

The eval I got had a ucd90124, and I replaced it with ucd90160a because its what I placed in my prototype.

Before I program my proto board, I wanted to use the eval and see how it works.  I have many rails to power sequence and also to monitor.

But for starters, if you could provide me an example in how to do the following.

 

For example, I have a Vin=5V, and two LDOs to convert 5V in to 3.3V and 1.8V.  I want to sequence 3.3V to turn on first until pgood and then enable the 1.8V LDO.

So How do I build a new system?  Say I want to use mon1 to monitor 5Vin.  As soon as its about >90% 5V, I want to use an GPO 1 to enable 3.3V LDO.

Next, once the 3.3V LDO is good then feed this signal to Mon2 I guess and then use GPO2 to enable 1.8V LDO.

And then monitor the health of 3.3V and 1.8Vs.

Thanks,

JP