TPS737: why the crossover frequency in bode figure of TPS73701 is too low?

Max Han

Part Number: TPS737

Hi,

below is the shcematic and bode figure, customer want to konw why the crossover frequency in bode figure of TPS73701 is too low?

could you help to check bode figure on EVM?

thanks

over 7 years ago

0 Max Han over 7 years ago

TI__Intellectual 2260 points

0 Ryan Eslinger over 7 years ago in reply to Max Han

TI__Guru 55940 points

Hi Max,

I agree that the Bode Plot you provide does not show what we would expect. Your provided schematic matches the schematic from the following thread which shows a crossover frequency in the range we would expect to see:

e2e.ti.com/.../704151

Could you help me understand how you made your measurement? Also what were the conditions for this measurement (Vin, Vout, Iout etc)?

Very Respectfully,
Ryan

0 Ryan Eslinger over 7 years ago in reply to Ryan Eslinger

TI__Guru 55940 points

Hi Max,

The following application report walks through how to take a Bode Plot for a regulator:

www.ti.com/.../snva364a.pdf

Very Respectfully,
Ryan

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TPS737: why the crossover frequency in bode figure of TPS73701 is too low?