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FIBOCOM NL668-EAU-MiniPCIe-10 Hardware User Manual
Page 20 of 56
transmit), the maximum operating current can reach 3A, and the power voltage needs to be at least 3.3V.
Otherwise, the module may power off or restart. The power limit is shown in Figure 3-3.
Burst transmit
Burst transmit
min:3.3V
VBAT
Ripple
≤
300mV
Drop
VBAT
≥
3.3V
Figure 3-3 Power Limit
3.2.2 1.8V Output
Module outputs a 1.8V voltage through the VDD_EXT for use of the internal digital circuit of the module.
The voltage is the logic level voltage of the module and can be used to indicate that the module is on or off,
or for external low current (<80mA) circuit. If it is not in use, keep it in floating status. The logic level of
VDD_EXT is defined as follows.
Parameter
Minimum
Typical
Maximum
Unit
VDD_EXT
1.71
1.8
1.89
V
Table 3-4 VDD_EXT Logic Level Definition
3.2.3 Power Consumption
The power consumption of module in the case of 3.8V power supply is shown in the following table.
(Please send
at+syscmd=start_pcm stop command to
close codec founction)
Parameter
Mode
Condition
Average Current
Typ. (mA)
I
off
Power off Power supply,
module power off
0.018
I
Sleep
GSM
MFRMS 2(USB Sleep)
≤2.6
MFRMS 5(USB Sleep)
≤2.6
MFRMS 9(USB Sleep)
≤2.6
WCDMA
DRX=6(USB Sleep)
≤3
DRX=7(USB Sleep)
≤3
DRX=8(USB Sleep)
≤3
DRX=9(USB Sleep)
≤3
LTE FDD
Paging cycle #64 frames (USB Sleep)
≤3
Paging cycle #128 frames (USB Sleep)
≤3
Paging cycle #256 frames (USB Sleep)
≤3
