the en pin of tps63001

feng liu

Other Parts Discussed in Thread: TPS63001

dear:

i have a problem of en pin to control the tps63001 to output.

i want to implement the function as follows:when the en pin is high 3.3v,the output will be 3.3v,when the en pin is low as ground,the the output will be 0v

but i build the schematic as follows:

but when the en pin contact to the ground ,the output will be falloff from 3.3v to 0v,and the time of falloff is about 10minutes

over 9 years ago

0 Michael Helmlinger over 9 years ago

TI__Expert 5055 points

Hi,

What is the load current? Is there a load when you pull the EN pin to ground?
The TPS63001 has no output discharge function. With no load on the output it will take some time until the Vout reaches 0.

Regards,
Michael

0 feng liu over 9 years ago in reply to Michael Helmlinger

Intellectual 295 points

thank you,i have solved.in fact,the en pin and vina and ps/sync must be bond together,and with a limited resistance to the controlled pin from mcu.

0 feng liu over 9 years ago in reply to feng liu

Intellectual 295 points

thank you,i have solved.in fact,the en pin and vina and ps/sync must be bond together,and with a limited resistance 100Ω to the controlled pin from mcu.

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the en pin of tps63001