Some KiCad symbols for IC's that I use that are not in KiCad that I created the symbols for (and using the standard footprints in KiCad). Use at own your own RISK (see LICENSE for specifics).
The components are split up in libraries mainly by function. If you want to use a single part only make sure you download all the <library name>.* files and not just the <library name>.lib if there are more files with the same name but different extension. Other than that follow the default course for including the symbols in KiCad (Preferences -> Manage Symbol library in KiCad 5.1.10 at least).
Some symbols to define some of the LDO's that Holtek produces (https://www.holtek.com/)
- HT73xx
- HT73xx-1
- HT73xx-2
- HT73xx-3
- HT-78xx
Some symbol relating to battery management/chargers (battery protection, chargers etc.).
- TP4056 (http://tp-asic.com/ or http://www.tp4056.com)
- DW01xx (https://www.ic-fortune.com/eng)
A library containing N-Channel MOSFETs.
- FS8205 (https://www.ic-fortune.com/eng)
- FS8205A (https://www.ic-fortune.com/eng)
- IRLML2502 (Internal Rectifier, now Infineon https://www.infineon.com/)
A library containing some extra voltage detectors.
- KA75xxx (Fairchild)