PSoC® 6 BLE Prototyping Board Guide, Doc. # 002-24993 Rev. **
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Appendix
A.2.3
Power Supply System
The power supply system uses 5 V from the USB connector as the input to a voltage regulator on the
KitProg2 section of the board. This regulator provides 3.3 V to the PSoC 6 MCU by default. Provi-
sions have been added so that the output can be easily changed to 2.5 V or 1.8 V by adding either
R9 or R41 zero-ohm resistors respectively. You can also connect an external power supply to the
board at P6.VDD that is present on pin 20 of J1 for low-voltage applications.
Figure A-4. Target Power Supply
A.2.3.1
Optional PSoC 6 MCU Voltage Regulator
If the PSoC 6 MCU section of the board is disconnected from the KitProg2 side by breaking the
board between J4 and J5, there are two power options. The first option is to power the board directly
with the required voltage at the target voltage (P6.VDD) on connector J1, pin 20. The other
alternative is to load the optional components for the PSoC 6 MCU regulator and apply a voltage at
the VIN connector (J2, pin 20). See schematic below for the PSoC 6 MCU regulator.
Figure A-5. Optional PSoC 6 MCU Regulator
C22
4.7uF
10V
C24
4.7uF
10V
Note: If R9 is loaded
output will be 2.5V. If
R41 is loaded, output will
be 1.8V
R8
383K
1%
VBUS
R9
0ohm
No Load
R7
57.6K
1%
R6
180K
1%
U2
AP7365-WG-7
IN
1
GN
D
2
EN
3
ADJ
4
OUT
5
C23
0.1uF
VOUT
Target Voltage Regulator
3.3V 400mA
R40
120K
1%
R41
0ohm
No Load
C25
4.7uF
10V
No Load
C27
4.7uF
10V
No Load
R23
57.6K
1%
No Load
PMIC_EN
VIN
R22
180K
1%
No Load
U6
AP7365-WG-7
No Load
IN
1
GN
D
2
EN
3
ADJ
4
OUT
5
C26
0.1uF
No Load
VCC_3V3
PSoC 6 Regulator
3.3V 600mA
Caution:
Note that the PSoC 6 BLE Prototyping Board does not have any
onboard ESD protection circuitry. Therefore, the power source for the
PSoC 6 BLE Prototyping Board must be of high quality to make sure that
the board is protected from any over-current conditions and swapped-
power connections.
