add LM74700-Q1 ideal diode controller

[florolf]

Add the LM74700-Q1 ideal diode controller.

Symbol passes the linter. Datasheet link: http://www.ti.com/lit/gpn/LM74700-Q1

Screenshot:

The pin positions are chosen such that default-sized symbols fit easily:

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[evanshultz]

Thanks for this contribution!

1. I only see this in automotive, but let's still remove the -Q1 from the symbol name.
2. End the description with the package, in this case , SOT-23-6.
3. Let's make pin 1 Passive type.
4. I'm unsure about pin 6. I'm thinking it should be Power Input to help catch a mistake where the net on that pin is not a power source. What do you think?

[florolf]

Thanks for looking into the PR.

1. I only see this in automotive, but let's still remove the -Q1 from the symbol name.

There's no non-automotive version at the moment, so I thought we should consider the suffix as a part of the proper name. But sure, let's drop it.

2. End the description with the package, in this case , SOT-23-6.

Done.

3. Let's make pin 1 Passive type.

Okay, I was unsure about this one.

4. I'm unsure about pin 6. I'm thinking it should be Power Input to help catch a mistake where the net on that pin is not a power source. What do you think?

You're right. From the point of view of the chip, this actually is a power input: It powers the charge pump as well as the logic.

[evanshultz]

Thanks. Please don't force push as it makes it harder for the librarians to review your changes.