4-layer board with smaller components

This is a major change!  Almost all the components have changed to
smaller versions, with 0603 and 0402 passives and a QFN microcontroller.
The board now has four layers, with internal layers used for VBUS and
GND.  The board now measures a mere 25×30 mm!  The SWD header and Boot
switch footprints have been moved to the bottom to help with this
shrinkage.  Two test points were added to the bottom as well to make it
possible to power the board without using the USB connector.  The
mounting holes are now slightly smaller (better sized for M3), and only
17 mm apart instead of the old 18 mm.

To sum up, everything is smaller and that's almost entirely a good
thing, except now it's not really possible to build one by hand.

microcontroller.sch

 Comment4 ""
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-NOPWR
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output.sch

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pd-buddy-sink-cache.lib

 ENDDRAW
 ENDDEF
 #
-# STM32F072C8Tx
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+ALIAS STM32F072CBUx
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+#
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+F3 "" 0 0 50 H I C CNN
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pd-buddy-sink.sch

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 F 3 "" H 4350 5700 60  0001 C CNN
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pd-buddy.pretty/Amphenol-12401610E4#2A.kicad_mod

-(module Amphenol-12401610E4#2A (layer F.Cu) (tedit 58F6BCF2)
+(module Amphenol-12401610E4#2A (layer F.Cu) (tedit 58FD093C)
   (attr smd)
   (fp_text reference REF** (at 0 -2) (layer F.SilkS)
     (effects (font (size 1 1) (thickness 0.15)))
   (fp_text value Amphenol-12401610E4#2A (at 0 10.5) (layer F.Fab)
     (effects (font (size 1 1) (thickness 0.15)))
   )
+  (fp_line (start -5.7 10.1) (end -5.7 -1.5) (layer F.CrtYd) (width 0.05))
+  (fp_line (start 5.7 10.1) (end -5.7 10.1) (layer F.CrtYd) (width 0.05))
+  (fp_line (start 5.7 -1.5) (end 5.7 10.1) (layer F.CrtYd) (width 0.05))
+  (fp_line (start -5.7 -1.5) (end 5.7 -1.5) (layer F.CrtYd) (width 0.05))
   (fp_text user REF** (at 0 -2) (layer F.Fab)
     (effects (font (size 1 1) (thickness 0.15)))
   )

pd_phy.sch

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 P 5300 4100
-F 0 "#PWR028" H 5300 3850 50  0001 C CNN
+F 0 "#PWR030" H 5300 3850 50  0001 C CNN
 F 1 "GND" H 5300 3950 50  0000 C CNN
 F 2 "" H 5300 4100 50  0000 C CNN
 F 3 "" H 5300 4100 50  0000 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L GND #PWR029
+L GND #PWR031
 U 1 1 588FB494
 P 4600 4100
-F 0 "#PWR029" H 4600 3850 50  0001 C CNN
+F 0 "#PWR031" H 4600 3850 50  0001 C CNN
 F 1 "GND" H 4600 3950 50  0000 C CNN
 F 2 "" H 4600 4100 50  0000 C CNN
 F 3 "" H 4600 4100 50  0000 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GND #PWR030
+L GND #PWR032
 U 1 1 588FB4C0
 P 4300 4100
-F 0 "#PWR030" H 4300 3850 50  0001 C CNN
+F 0 "#PWR032" H 4300 3850 50  0001 C CNN
 F 1 "GND" H 4300 3950 50  0000 C CNN
 F 2 "" H 4300 4100 50  0000 C CNN
 F 3 "" H 4300 4100 50  0000 C CNN
 Wire Wire Line
 	5800 3500 5700 3500
 $Comp
-L +3.3V #PWR031
+L +3.3V #PWR033
 U 1 1 5892A15C
 P 6800 3200
-F 0 "#PWR031" H 6800 3050 50  0001 C CNN
+F 0 "#PWR033" H 6800 3050 50  0001 C CNN
 F 1 "+3.3V" H 6800 3340 50  0000 C CNN
 F 2 "" H 6800 3200 50  0000 C CNN
 F 3 "" H 6800 3200 50  0000 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GND #PWR032
+L GND #PWR034
 U 1 1 5892A162
 P 6800 3900
-F 0 "#PWR032" H 6800 3650 50  0001 C CNN
+F 0 "#PWR034" H 6800 3650 50  0001 C CNN
 F 1 "GND" H 6800 3750 50  0000 C CNN
 F 2 "" H 6800 3900 50  0000 C CNN
 F 3 "" H 6800 3900 50  0000 C CNN
 P 6800 3550
 F 0 "C11" H 6825 3650 50  0000 L CNN
 F 1 "0.1μF" H 6825 3450 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0805" H 6838 3400 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0402" H 6838 3400 50  0001 C CNN
 F 3 "" H 6800 3550 50  0000 C CNN
 	1    6800 3550
 	1    0    0    -1  
 P 7200 3550
 F 0 "C12" H 7225 3650 50  0000 L CNN
 F 1 "1μF" H 7225 3450 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0805" H 7238 3400 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0402" H 7238 3400 50  0001 C CNN
 F 3 "" H 7200 3550 50  0000 C CNN
 	1    7200 3550
 	1    0    0    -1  

usb_type-c.sch

 	3400 1850 3500 1850
 Connection ~ 3400 2950
 $Comp
-L GND #PWR033
+L GND #PWR035
 U 1 1 588FA6DC
 P 4100 3250
-F 0 "#PWR033" H 4100 3000 50  0001 C CNN
+F 0 "#PWR035" H 4100 3000 50  0001 C CNN
 F 1 "GND" H 4100 3100 50  0000 C CNN
 F 2 "" H 4100 3250 50  0000 C CNN
 F 3 "" H 4100 3250 50  0000 C CNN
 Connection ~ 3300 2150
 Connection ~ 4900 2150
 $Comp
-L VBUS #PWR034
+L VBUS #PWR036
 U 1 1 588FA72C
 P 4100 1450
-F 0 "#PWR034" H 4100 1300 50  0001 C CNN
+F 0 "#PWR036" H 4100 1300 50  0001 C CNN
 F 1 "VBUS" H 4100 1590 50  0000 C CNN
 F 2 "" H 4100 1450 50  0000 C CNN
 F 3 "" H 4100 1450 50  0000 C CNN
 Text HLabel 5200 2450 2    60   BiDi ~ 0
 D-
 $Comp
-L PWR_FLAG #FLG035
+L PWR_FLAG #FLG037
 U 1 1 588FBE9F
 P 4800 3250
-F 0 "#FLG035" H 4800 3345 50  0001 C CNN
+F 0 "#FLG037" H 4800 3345 50  0001 C CNN
 F 1 "PWR_FLAG" H 4800 3430 50  0000 C CNN
 F 2 "" H 4800 3250 50  0000 C CNN
 F 3 "" H 4800 3250 50  0000 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L PWR_FLAG #FLG036
+L PWR_FLAG #FLG038
 U 1 1 588FBEB8
 P 4900 1550
-F 0 "#FLG036" H 4900 1645 50  0001 C CNN
+F 0 "#FLG038" H 4900 1645 50  0001 C CNN
 F 1 "PWR_FLAG" H 4900 1730 50  0000 C CNN
 F 2 "" H 4900 1550 50  0000 C CNN
 F 3 "" H 4900 1550 50  0000 C CNN

voltage_regulator.sch

 P 6650 3750
 F 0 "C2" H 6675 3850 50  0000 L CNN
 F 1 "2.2μF" H 6675 3650 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0805" H 6688 3600 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0603" H 6688 3600 50  0001 C CNN
 F 3 "" H 6650 3750 50  0000 C CNN
 	1    6650 3750
 	1    0    0    -1  
 U 1 1 588FA3EC
 P 5450 3750
 F 0 "C1" H 5475 3850 50  0000 L CNN
-F 1 "1.0μF" H 5475 3650 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0805" H 5488 3600 50  0001 C CNN
+F 1 "1.0μF 25V" H 5475 3650 50  0000 L CNN
+F 2 "Capacitors_SMD:C_0603" H 5488 3600 50  0001 C CNN
 F 3 "" H 5450 3750 50  0000 C CNN
 	1    5450 3750
 	1    0    0    -1  
 	1    6050 3500
 	1    0    0    -1  
 $EndComp
+$Comp
+L VBUS #PWR06
+U 1 1 58FBCEC4
+P 4500 3500
+F 0 "#PWR06" H 4500 3350 50  0001 C CNN
+F 1 "VBUS" H 4500 3640 50  0000 C CNN
+F 2 "" H 4500 3500 50  0000 C CNN
+F 3 "" H 4500 3500 50  0000 C CNN
+	1    4500 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR07
+U 1 1 58FBCEDB
+P 4500 3900
+F 0 "#PWR07" H 4500 3650 50  0001 C CNN
+F 1 "GND" H 4500 3750 50  0000 C CNN
+F 2 "" H 4500 3900 50  0000 C CNN
+F 3 "" H 4500 3900 50  0000 C CNN
+	1    4500 3900
+	1    0    0    -1  
+$EndComp
+$Comp
+L TEST TP1
+U 1 1 58FBCF4C
+P 4600 3600
+F 0 "TP1" H 4600 3900 50  0000 C BNN
+F 1 "VBUS" H 4600 3850 50  0000 C CNN
+F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4600 3600 50  0001 C CNN
+F 3 "" H 4600 3600 50  0001 C CNN
+	1    4600 3600
+	0    1    1    0   
+$EndComp
+$Comp
+L TEST TP2
+U 1 1 58FBD023
+P 4600 3800
+F 0 "TP2" H 4600 4100 50  0000 C BNN
+F 1 "GND" H 4600 4050 50  0000 C CNN
+F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4600 3800 50  0001 C CNN
+F 3 "" H 4600 3800 50  0001 C CNN
+	1    4600 3800
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	4600 3600 4500 3600
+Wire Wire Line
+	4500 3600 4500 3500
+Wire Wire Line
+	4600 3800 4500 3800
+Wire Wire Line
+	4500 3800 4500 3900
 $EndSCHEMATC