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TPS54040A: Low Voltage Operation

Prodigy 30 points

Replies: 1

Views: 438

Part Number: TPS54040A

Hi, I am looking at using the TPS5404A with efuse protection as in the reference design TIDA-00180. The TPS54040 can step down the voltage to 0.8V, but I am guessing the operation is limited to 5V (stated in the reference design) due to the efuse. Is there any alternative protection IC allowing for operation down to these voltages. 

Also, I noticed that a digital-pot was used instead of a DAC to set the voltage. Which method would give the highest voltage resolution when interfacing with the step-down converter as I thought the DAC would be more accurate? 

Thanks! 

1 Reply

  • I do not think the Efuse is the limitation. I think you just have to select R7, R11 and R10 as shown in Eq 24 and 25. to change the output voltage range.

    Best  Regards,

    John Tucker

    BSR-MV DC/DC Applications

     

    “Working on an automotive power design? Read the E2E technical article Meet European Commission ADAS requirements with TI DC/DC for device recommendations and other helpful resources.”

     

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