Figure 5: Power Supply Schematic For Lte Open Evb - Quectel LTE OPEN EVB User Manual

J0601
Micro-USB
interface
J0301
Power
jack
Before connecting the power supply, customers have to select a proper DC power adapter to supply
power for the LTE OPEN EVB, and the power plug design of the adapter is shown as below.
Inner contact
LTE_OPEN_EVB_User_Guide
S0301
Power
switch
TPS54319
Step-down converter

Figure 5: Power Supply Schematic for LTE OPEN EVB

Figure 6: Power Interfaces
Outer contact
Figure 7: Power Plug Design
1.8V
Power supply for EEPROM, SD
U0401
card, eMMC, SPI Flash, codec
LDO
boards and Wi-Fi modules
Power supply for
ADC and eMMC
3.3V
U0402
U0403
LDO
LDO
U0301
Power supply for
LTE-QuecOpen modules
VBAT
LTE Module Series
LTE OPEN EVB User Guide
Wi-Fi modules,
2.85V
Power supply for
SD card
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