Power Supply System - Cypress PSoC CY8CPROTO-063-BLE Quick Start Manual

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
VBUS
C22 C23
4.7uF 0.1uF
10V
Note: If R9 is loaded
output will be 2.5V. If
R41 is loaded, output will
be 1.8V
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
VIN
C25
4.7uF
10V
No Load
PMIC_EN
PSoC® 6 BLE Prototyping Board Guide, Doc. # 002-24993 Rev. **
Target Voltage Regulator
U2
1 5
3.3V 400mA
IN OUT
3 4
R6
EN ADJ
180K
1%
AP7365-WG-7
R9
No Load
R7 57.6K R41
1%
No Load
PSoC 6 Regulator
U6
1 5
IN OUT
3 4
C26
EN ADJ
0.1uF
No Load
No Load AP7365-WG-7
R23
No Load
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.
VOUT
R8 C24
383K 4.7uF
1% R40 10V
120K
0ohm 1%
0ohm
VCC_3V3
3.3V 600mA
R22 C27
180K 4.7uF
1% 10V
No Load No Load
57.6K
1%
Appendix
30