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1 W930 EVT System Voltage fail analysis report Prepared: Aaron Date:
2 Fail item-1 1. Fail item table
3 2. Action: Widen the trace, and test if it is improved.It is also failed.
4 Delete inductor L28 (&L63),it is passed.
5 +1_05V_VCC_EXP,it is passed.
6 Action: 1.Enhance the source voltage of +1_05V_VTT, for example 40mV,change PR187 from 13.3k to 15k.
7 Solution: 1.Enhance the source voltage of +1_05V_VTT, The value of Suggestion 30mV. 2.Improve Layout, Widen the power trace.
8 3. Action: Widen the trace, and test if it is improved. It is passed.
11 Action: 1.Enhance the source voltage of +1_05V_VTT, for example 20mV,change PR222 from 3.3k to 3.9k and PR229 from 10k to 11k.
12 Solution: 1.Enhance the source voltage of PEX_VDD, The value of Suggestion 20mV. 2.Improve Layout, Widen the power trace.
13 4. Action: Widen the trace, and test if it is improved. It is passed.
14 Solution: 1.Improve Layout, Widen the power trace.
15 4. Solution: 1.Improve Layout, Widen the power trace.
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