BQ25883: RENG

zhang ping

Part Number: BQ25883

8.3.2 Device Power Up from Battery without Input Source Bq25883 works in 8.3.2 state. The battery is two lithium batteries in series (DC power supply simulation). The voltage on regn pin is 5V, and LDO is not started at this time. How is the voltage generated on regn? Is it right that the voltage on regn is not zero?

over 4 years ago

0 Michael Emanuel35 over 4 years ago

TI__Mastermind 29945 points

Dear Zhang,

In section 8.3.2 of the datasheet it says that "The REGN LDO stays off to minimize quiescent current."

Thanks,

Mike Emanuel

Please click "This resolved my issue" button if this post answers your question.

0 zhang ping over 4 years ago in reply to Michael Emanuel35

Genius 3195 points

In the 8.3.2 state, LDO is static, but the voltage of pin regn is not 0V, right?

0 Michael Emanuel35 over 4 years ago in reply to zhang ping

TI__Mastermind 29945 points

Dear Zhang,

If the ADC is enabled, REGN will be up. However, if the ADC is disabled, REGN should be down. REGN may take some time to discharge due to the capacitor attached to it.

Thanks,

Mike Emanuel

Please click "This resolved my issue" button if this post answers your question.

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BQ25883: RENG