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TPS62177: Use of the sleep pin

Part Number: TPS62177

Hello,

I have a question regarding the use of the "Sleep" Pin for the TPS62177.

In the datasheet I saw that if a high current is pull when the device is in sleep mode, as a safety feature the device return to normal operation automatically to avoid a complete collapse of Vout.

It is then wrote that this is not a recommanded operation mode to let the device wake up automatically. So i understand that we need to "pilot" the sleep pin to avoid that "safety feature".

The questions is :

- Do you confirm my understanding above ?

- What is the risk to only use that safety feature to go between sleep and run ? (in fact to let the sleep mode activated)

Thanks a lot,

Best regards

  • Hi Baptiste,

    As noted in section 8.4.4 of the D/S, the output voltage will not remain steady during this time and will drop. This is likely not acceptable for your system. Therefore, we expect the MCU to actively drive the SLEEP pin as needed to support the application.