LM27761: Question for LM27761 input and output range

Jacky Wang(QD)

Part Number: LM27761

Hi experts,

Our customer is evaluating the LM27761 for 3.3V input to -4V output application, but having some issues for the output voltage. From the datasheet design example, looks like we can support this use case, do you know what's the problem in here? What's the minimum negative voltage we can get from 3.3V input for this device?

over 5 years ago

0 Febin over 5 years ago

TI__Mastermind 25430 points

Hi Jacky,

If I understand correctly, the customer wants a Vout of -4V when Vin is 3.3V. This is not possible with this device. It is a voltage inverter and the efficiency of this device is also not very high. Hence, the output voltage will be definitely less than 3.3V and this value is solely dependent on the customer application, load conditions, etc. It is not possible to determine an exact voltage threshold.

Regards,

Febin

0 Febin over 5 years ago in reply to Febin

TI__Mastermind 25430 points

Hi Jacky,

I have not heard back from you. Do you need further support on this question?

Regards,

Febin

0 Jacky Wang(QD) over 5 years ago in reply to Febin

TI__Genius 11530 points

Hi Febin,

Sorry for the late response, we understand the use case for this device now, no further support needed. Thanks.

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LM27761: Question for LM27761 input and output range