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TPS61070: EN Pin not effective in power ON and OFF

Sathyadevaki R

Prodigy 20 points

Part Number: TPS61070

We have used this DC DC converter for 3V battery input and 3.3V Output from the TPS61070. We have connected the Slide switch in EN pin to On and OFF the DCDC converter.

When EN goes Low/ 0V, the DC DC converter is not going off state. Still I could see the 3.3V output at Vout. Below is the Schematic of our application

Kindly look into this and support us.

0 Travis Wang 10 months ago

TI__Expert 4815 points

Hi Sathyadevaki,

I would like to know what is your load condition after EN is pulled low.

Best Regards,

Travis

0 Sathyadevaki R 10 months ago in reply to Travis Wang

Prodigy 20 points

Hello Travis,

Even though EN is low, We are able to see the load is getting powered from TPS61070 and it is functioning.

Load current is 100mA

0 Travis Wang 10 months ago in reply to Sathyadevaki R

TI__Expert 4815 points

Hi Sathyadevaki,

If I understand your schematic right, You didn't pull the EN pin low. You're floating EN pin when the switch is zero:

I think the switch should be connected like this:

Best Regards,

Travis

+1 Sathyadevaki R 10 months ago in reply to Travis Wang

Prodigy 20 points

Ok Travis, Thank you so much.

Will check it.