CLM920_AC5 Mini PCIE LTE Module Hardware Manual
Shanghai Yuge Information Technology co., LTD
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3.3 Power interface
CLM920_AC5 Mini PCIE module power interface contains two parts
：
VBAT is the working power of the module;
UIM_PWR is the power supply for SIM card work
；
CLM920_AC5 Mini PCIE module power interface is as follows
：
Table 3-3 Definition of power pins
Pin
Name
I/O Description
Min Typical
Max
2,24,39,41,52
VBAT
PI
Module power
supply
3.3V 3.7V
4.2V
8
UIM_PWR PO
SIM power
supply
0
1.8V/2.85V 1.9/2.95V
17
VDD_EXT PO Output power
1.8V
4,9,15,18,21,26,
27,29,34,35,37,
40,43,50
GND
Ground
-
0
-
CLM920_AC5 Mini PCIE module adopts single power supply mode, the module provides 5
power supply pins and 14 ground pins. In order to ensure the normal operation of the module,
all power and ground pins must be connected and used. The power supply range of the
module is 3.3-4.2V, it is recommended to use 3.7V / 2A power supply. The module will
generate a current of more than 2A peak at the moment of data transmission or conversation,
resulting in a relatively large ripple on the power supply. Therefore, when the customer
designs the circuit, the power supply trace should be kept as short and wide as possible. It is
recommended to reserve a 220uF capacitor near the power input. It is recommended that
customers can use DCDC or LDO to provide sufficient current. Then control the VBAT power
supply through the MOS tube, so that the module can be completely powered off. The actual
use can refer to the following circuit design
：
