Pos/neg design with TPS7A4901 and TPS7A3001 regulators - 3001 reported resistors values don't look right

Harvey Wiggins

Trying to design pos/neg linear regulator circuits with TPS7A4901 and TPS7A3001 on output of +/-12V DC/DC. Desire +/-5V.
TPS7A4901: 11V to 13V, 5V output, 150 ma; reported resistors are 38.3K and 12K. Looks OK.
TPS7A3001: -11V to -13V, -5V output, 150ma; reported resistors are 768 ohm and 243 ohm. Doesn't look right.

over 9 years ago

0 Mahavir Jain over 9 years ago

TI__Intellectual 2405 points

Hello Harvey,

Thanks a lot for pointing this out. We will look into the issue and get back to you as soon as possible.

Best Regards,

Mahavir Jain.

0 Mahavir Jain over 9 years ago in reply to Mahavir Jain

TI__Intellectual 2405 points

Hello Harvey,

As suggested earlier, we went through the WEBENCH integration of TPS7A3001 and fixed the issue of incorrect resistor values. The latest values being calculated by WEBENCH for your test conditions are 32.4k and 10k respectively.

Please try out and let us know if you face any difficulties.

Thanks!!

Best Regards,
Mahavir Jain.

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Pos/neg design with TPS7A4901 and TPS7A3001 regulators - 3001 reported resistors values don't look right