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LM5163-Q1: LM5163-Q1 unstable voltage

Part Number: LM5163-Q1
Other Parts Discussed in Thread: LM5163

Hi,

I am using LM5163 DC/DC converter for output voltage 12V.

But the problem i am facing is that voltage is decreasing with input voltage(20V-60V).

Below is the circuit simulated on Ti-WEBench

Cboot : 2.2nF

L1: 82uH

Rr: 374k

Cr: 1.2nF

Cac: 47pF

Rfbt: 453k

Rfbb: 49.9k

Ron: 59k