Fibocom L831-EAU-01 - Power Supply; Power Supply Design

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L831-EAU-01 Hardware User Manual Page
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3.2 Power Supply
The power interface of L831-EAU module as shown in the following table:
Pin
Pin Name
I/O
Pin Description
DC Parameter
（
V
）
Minimum
Value
Typical
Value
Maximum
Value
2,4,70,72,74
+3.3V
PI
Power supply input
3.135
3.3
4.4
36
UIM_PWR
PO
USIM power supply
1.8V/3V
3.2.1 Power Supply
The L831-EAU module should be powered through the +3.3V pins, and the power supply design is shown
in Figure 3-2:
Figure 3-2 Power Supply Design