Hardware Reference Design; Power Supply; Power Supply Reference Design - Quectel UG96 Manual

4

Hardware Reference Design

The following chapters describe compatible design among UG96, UG95 and M95 R2.0 on main functions.

4.1. Power Supply

4.1.1. Power Supply Reference Design

Power design for a module is critical to its performance. The power supply of UG96, UG95 and M95 R2.0
should be able to provide sufficient current up to 2.0A. If the voltage drop between the input and output is
not too high, it is suggested that an LDO should be used to supply power for the module. If there is a big
voltage difference between the input source and the desired output (VBAT), a buck converter is preferred
to be used as the power supply.
The following figure shows a reference design for +5V input power source. The typical output of the power
supply is about 3.8V and the maximum load current is 3.0A.
DC_IN
C1
100nF
470uF
R5
4.7K
MCU_POWER
_ON/OFF
47K
UG96&UG95&M95 R2.0_Compatible_Design
MIC29302WU
2
IN
R1
C2
51K
Q1
R6
Figure 3: Reference Circuit Design of Power Supply
HSPA/UMTS/GSM/GPRS Module Series
UG96&UG95&M95 R2.0 Compatible Design
U1
4
OUT
R2
100K
1%
R4
470R
R3
47K
1%
VBAT
C3
C4
100nF
470uF
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