LTE-A&5G Module Series
PCIe Card EVB User Guide
PCIe_Card_EVB_User_Guide 16 / 38
4
Interface Application
This chapter describes the following hardware interfaces, as well as the switches, button, status indicators
and test points, of the PCIe Card EVB:
⚫
Power supply
⚫
M.2 interface
⚫
USB interface
⚫
(U)SIM interfaces
⚫
UART interface
4.1. Power Supply (J801/J401/J803/J501)
The PCIe Card EVB can be powered by an external power adapter through the power jack (J801) or USB
Type-B receptacle (J401) on the EVB. The power adapter is designed to be connected to a step-down
converter that converts the supplied voltage into proper voltage (VCC) for the module.
The power can also be supplied by inserting the EVB J501 into PCIe Card slot of the desktop computer.
The module can be directly powered by an external power source through connecting with the power jack
(J803), and this type of power supply is generally used for current consumption test.
The following two figures show the simplified power supply block diagram and the power interface of
Quectel PCIe Card EVB.
J801
S103
Power
supply
Power
switch
Step-down
converter
U802
TPS54319
VCC
Power supply for
M.2 module
1.8 V
VCC
U203
LDO
J401
USB Type-B
interface
VCC_
MODULE
U201
LDO
3.3 V
J501
PCIe interface
J803
EX_POWER
Figure 5: EVB Power Supply Block Diagram
