Differences between libraries names: PCB Design of nRF52832

Question

I am intended to integrate the Nordic SoC nRF52832 in our PCB to generate a PWM.
However, I could not understand the difference between the following: 
 topicSchematic QFAA and QFAB QFN48 with internal LDO setup 
 topicSchematic QFAA and QFAB QFN48 with DC/DC regulator setup 
 topicSchematic QFAA and QFAB QFN48 with DC/DC regulator and NFC setup 
 topicSchematic CIAA WLCSP with internal LDO setup 
 topicSchematic CIAA WLCSP with DC/DC regulator setup 
 topicSchematic CIAA WLCSP with DC/DC regulator and NFC setup 
 Can you please explain to me what each one means?
Thank you

RK · Accepted Answer

QFAA vs WLCPS is the chip packaging, Quad Flat No lead or a chip-scale package, you can look the package details up in the reference manual. 
 The LDO vs DC/DC is what kind of power supply is used, a simple but slightly wasteful LDO or a more efficient DC/DC requiring a few more components. 
 The NFC fairly directly says whether there is circuitry for an external NFC antenna. 
 Pretty descriptive really.

Differences between libraries names: PCB Design of nRF52832

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