T1040 Voltage Ramp

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T1040 Voltage Ramp

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darrellblock
NXP Employee
NXP Employee

Customer has T1040 power-up question.  They are planning on having all voltage rails come up ratiometrically (see image).  This looks to be OK but they would like verification.


T1040 Voltage Ramp.png
   
 
 
 
 
 
 
 
 
 
 
 





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r8070z
NXP TechSupport
NXP TechSupport

Have a great day,

The T1040 data sheet available on the NXP site (link) provides  the power sequencing requirements. It should be satisfied. There are 3 groups of power supplies. There is not ordering requirement with respect to one another in the same group. Groups 1,2 and 3 must be ordered sequentially such that voltage rails on a previous step must reach 90% of their value before the voltage rails on the current step reach 10% of theirs

Ramp-up.png

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