Quectel BC66 User Manual

NB-IoT Module Series
BC66&BC660K-GL Compatible Design
BC66&BC660K-GL_Compatible_Design 15 / 30
4 Hardware Reference Design
The following chapters describe the compatible design of BC66 and BC660K-GL in terms of their main
application functions and interfaces.
4.1. Power Supply
4.1.1. Operating Voltage
The power supply ranges of BC66/BC660K-GL are listed below:
Table 6: Module Operating Voltage Range
When considering the compatible design of the modules, make sure the input voltage is 2.2–3.63 V.
Ensure the module’s input voltage never drops below 2.2 V during operation.
Vdrop
VBAT
Figure 2: VBAT Voltage Waveform Diagram
4.1.2. Power Supply Reference Design
Power design for a module is critical to its performance. It is recommended to use a low quiescent current
LDO with an output capacity of 0.5 A to regulate the power supply for both BC66 and BC660K-GL.
To ensure better power supply performance and compatibility, the recommended input voltage is 3.3 V.
Also, it is recommended to add 100 μF, 100 nF, 100 pF and 22 pF capacitors near the VBAT pins of BC66
Module
Power Supply Pins
Min.
Typ.
Max.
Unit
Conditions
BC66
VBAT_BB &
VBAT_RF
2.1
3.3
3.63
V
The actual input voltages must
stay between the minimum and
maximum values.
BC660K-GL
VBAT
2.2
3.3
4.3
V

Quectel BC66 Specifications

General

Brand	Quectel
Model	BC66
Category	GSM/GPRS Modules
Language	English