TPS51125

Thu Duong

Other Parts Discussed in Thread: TPS51125

I am running PSPICE to simulate TPS51125. If connecting pin EN0 with 620K and bringing down to GND as in the data sheet shown, the output voltages were approximately 0. However, connecting pin EN0 with 1.5V as in your simulation model, the output voltages were 5V and 3.3V as we expected.

So, please give us the advice about this case. Because we will bring up our product soon.

BEst regards,

Thu

over 14 years ago

0 Britt Brooks - Online Design Tools over 14 years ago

TI__Mastermind 41310 points

Thu Duong,

The model is set up to enable the Vref, Vreg5, and Vreg3 with a voltage greater than the EN0 threshold in the electrical characteristics table. The current source that would provide a voltage when the pin is connected to ground through a resistor is not currently modeled, however, the actual part will function that way.

The model believes that the part is being disabled when the EN0 pin is connected to ground through a resistor.

Please let me know if you have any additional questions.

Britt

0 Thu Duong over 14 years ago in reply to Britt Brooks - Online Design Tools

Prodigy 120 points

Thank you very much for your support. It help us a lot.

Best regards,

Thu

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TPS51125