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RE: Being one who

Thanks for the schematic, now we can know "For Sure" what other regulators are being used. See below data sheets from the manufacture.
Spoiler Alert: Looks like they are Linear Regulated.

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The NCP1117 series are low dropout (LDO) positive linear voltage regulators that are capable of providing an output current that is in excess of 1.0 A with a maximum dropout voltage of 1.2 V at 800 mA over temperature. This series contains eight fixed output voltages of 1.5 V, 1.8 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V that have no minimum load requirement to maintain regulation. Also included is an adjustable output version that can be programmed from 1.25 V to 18.8 V with two external resistors. On chip trimming adjusts the reference/output voltage to within +/- 1.0% accuracy. Internal protection features consist of output current limiting, safe operating area compensation, and thermal shutdown. The NCP1117 series can operate with up to 20 V input. Devices are available in SOT223 and DPAK packages.

Line Regulation for 3.3 V = 0.8mV or 0.0008V

http://www.onsemi.com/PowerSolutions/product.do?id=NCP1117

http://www.onsemi.com/pub_link/Collateral/NCP1117-D.PDF
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LP2980

8.1 Application Information
The LP2980-N is a linear voltage regulator operating from 2.1 V to 16 V on the input and regulates voltages
between 2.5 V to 5 V with 0.5% accuracy and 50-mA maximum output current. Efficiency is defined by the ratio
of output voltage to input voltage because the LP2980-N is a linear voltage regulator.

Line Regulation for ≤ 16 V = 0.7mV or 0.0007V

http://www.ti.com/lit/ds/symlink/lp2980-n.pdf
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Edits: 02/18/17 02/18/17
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