LTM4637 negative output

Yes, LTM4637 can give negative output. But for negative Vout config, the inductor current is not exactly the same as inductor current, so it may not give out 20A as in buck config.

Thank you for your reply!

I want to know how much current can be supplied when the output is - 5V.

20*(1-5/(12+5)=14A.

Thank you !

I need the -5v output of 20A, can I use two LTM4637 in parallel? Or is there a better chip?

You may want to check these other options: www.analog.com/.../11501

? ? "www.analog.com/.../11501" I don't think I can open it...

I think something is wrong copy paste links. I will consult this EZ team.

You simply have to go to analog.com then go to Products > Power Management > Switching Regulators > Inverting Regulators and search using your input and output specs.

thanks for your help!

The circuit is more complicated of Inverting DC/DC Controller. I want to know that could I use two LTM4637 in parallel for -5V?

Yes, you can parallel two LTM4637. You can also use one LTM4630A. LTM4630A is a two phase controller. Two phases in parallel can give 36A in total.

The maximum input voltage is 18V of LTM4630, so I don't think it is suitable for 12V input & -5V output(20A). In this case, I think it would be better to use two LTM4638 than two LTM4637, because LTM4638 is cheaper than LTM4637. Am I right ?

The maximum input voltage is 18V of LTM4630, so I don't think it is suitable for 12V input & -5V output(20A). In this case, I think it would be better to use two LTM4638 than two LTM4637, because LTM4638 is cheaper than LTM4637. Am I right ?