TPS7A89: Tied outputs for 4A Output

Cameron Perl

Part Number: TPS7A89

Hey team I thought this was an interesting question - theoretically you could tie the two outputs of this device together to create a 4A line, correct? What are the practical downsides to doing this?

over 4 years ago

0 Stephen Ziel over 4 years ago

TI__Mastermind 36445 points

Hi Cameron,

You cannot tie the outputs of two regulators together for the added current draw, you must use some additional circuitry to make this concept work in practice. You can find plenty of details on paralleling linear regulators in the following documents. Let me know if you need anything else.

https://www.ti.com/cn/lit/ug/tidu421/tidu421.pdf

https://www.ti.com/lit/ug/tiducs7/tiducs7.pdf

https://www.ti.com/lit/an/slva250/slva250.pdf

Thanks,

- Stephen

Power management

Power management forum

TPS7A89: Tied outputs for 4A Output