CLM920_RC3(RV3 RE3)LCC Series CAT1 Module Hardware Manual
Shanghai YUGE Information Technology Co., Ltd.
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Figure 3-2 Power supply design
Table 3-5 Power supply design description
When the module is registered in GSM mode and the maximum power is transmitted, the
peak current can reach 2A instantly, resulting in a large voltage drop on the power supply. At
this time, make sure that the power supply voltage is not lower than 3.3V, otherwise the
module may work abnormally. In order to ensure that the VBAT voltage does not fall below
3.3V, it is also recommended that the VBAT trace be as short and thick as possible to reduce
the equivalent impedance of the trace.
Recommended value
Application
Remarks
220uF
Voltage stabilizing
capacitor
Use low ESR value capacitors to
reduce power supply fluctuations
WS4.5DPF
Low capacitance TVS
tube
Avoid power surge or ESD damage
to the chip
1uF
，
100nF
Filter capacitor
Filter out the interference of digital
signal noise
33pF
，
10pF
Filter capacitor
Filter out low frequency and
mid-range radio frequency
interference
