P9241-G-EVK Evaluation Kit User Manual
© 2019 Integrated Device Technology, Inc.
9
March 1, 2019
Figure 8. Buck Regulator PCB Location
Bypass Path of the External Buck Regulator
When the adaptor voltage is 5V only (such as for USB DCP or legacy USB 5V adaptors), the P9241-G-EVK supports such adaptors by turning
off the buck regulator and then enabling a bypass path. The P9241-G will be operating in a variable frequency mode to adjust the total power
transferred. GPIO_A4 is used to turn on the bypass path.
Figure 9. Bypass Path Location in Schematic
Figure 10. Bypass Path PCB Location
Q1
SIA453EDJ-T1_GE3
1
2
3
4
7
5
6
8
R88
0
BYPASS BUCK OPTIONAL:
NEEDED FOR 5V SUPPORT
R8
100k
R4
100k
BY P_EN
Q4
2N7002
