User Guide
28 of 67
002-32601 Rev. *C
2021-12-02
EZ-
PD™ PMG1 MCU prototyping kits guide
CY7110/CY7111/CY7112/CY7113
EZ-
PD™ PMG1 prototyping kit system design
3.2.2
3.3-V LDO and power LED
The onboard 3.3-V LDO generates 3.3-V from the PMG1 USB PD sink port VBUS and is available as the power
input for the user button and user LED. This 3.3-V regulated output is available on an I/O header and can be
used as a power rail for external components and modules. The onboard 3.3-V LDO can source a maximum
current of 400 mA. The power LED glows green when the regulator output is available.
Figure 21
Onboard 3.3-V LDO and power LED
3.2.3
Overvoltage protection circuit
A MOSFET and Zener diode-based protection circuit is implemented to protect the KitProg3 (PSoC
™
5LP MCU)
from damage due to overvoltage and reverse voltage fault on the programming interface. The maximum rating
for the PSoC
™
5LP MCU device is 6 V; the circuit will shut down the supply if the voltage exceeds 6 V.
C22
22uF
3.3V LDO
R27
0E
VBUS_TY PE-C
RED
C21
0.1uF
3V3
3V3
3.3V
(5V)
VBUS_TY PE-C
U3
IFX25001MEV33HTSA1
I (IN)
1
Q(OUT
3
GN
D
1
2
GN
D
2
4
C20
0.1uF
C19
10uF
R26
0E
R28
330E
5%
LED4
GREEN
Power LED
3V3
