Quectel BC66 - Hardware Reference Design; Power Supply

NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 15 / 59
3.3. Pin Description
Table 3: I/O Parameters Definition
Type
Description
AI
Analog input
AO
Analog output
DI
Digital input
DO
Digital output
IO
Bidirectional
PI
Power input
PO
Power output
Table 4: Pin Description
Power Supply
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
VBAT_BB
42
PI
Power supply for
the module’s
baseband part
Vmax=3.63V
Vmin=2.1V
Vnorm=3.3V
VBAT_RF
43
PI
Power supply for
the module’s RF
part
Vmax=3.63V
Vmin=2.1V
Vnorm=3.3V
VDD_
EXT
24
PO
1.8V output
power supply
Vnorm=1.8V
No voltage output in
Deep Sleep mode.
It is intended to supply
power for the module’s
pull-up circuits, and is
thus not recommended
to be used as the
power supply for
external circuits.
GND
1, 27, 34,
36, 37, 40,
41
GND