Electrical Characteristics; Power; Power Supply - Fibocom NL668-LA Hardware User Manual

4 Electrical characteristics

4.1 Power

Table 4-1 show the power interface of NL668-LA series module.
Pin Name I/O
VBAT_RF PI
VBAT_BB PI
VDD_EXT PO
GND G
Note:
In the rest of the document, VBAT includes VBAT_BB and VBAT_RF.

4.2 Power supply

The NL668-LA series module needs to be powered by the VBAT pin. The recommend power design is
shown in Figure 4-1:
Table 4-1 is the filter capacitors design of power supply:
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FIBOCOM NL668-LA Series Hardware User Manual
Pin
57,58
59,60
7
8,9,10,19,22,36,46,48,50~
54,56,72,76,85~112
Table 4- 1 Power Interface
Figure 4- 1 Recommend Power Design
Description
Module power supply, 3.3V~4.3V, typical value 3.8V
Module power supply, 3.3V~4.3V, typical value 3.8V
Module digital voltage output, 1.8V, 80mA
All GND pins must be grounded
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