CLM920 TD3 LTE Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
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all power pins and ground pins must be connected and provide sufficient power supply
capability.
Figure 3-2 GSM TDMA network burst current supply voltage drop
Under the premise of ensuring that the VBAT power supply is sufficient, two
470uF/6.3V tantalum capacitors can be connected in parallel with the power input, and then
10pF, 33pF, 0.1uF, 1uF ceramic capacitors can be connected.
Figure 3-3 VBAT power supply
3.3.2 Power reference circuit
The actual design of the power circuit can use a switching DC power supply or a linear
LDO power supply to design the VBAT power supply. Both design circuits need to supply
enough current. Specific reference to the following circuit design
：
Figure 3-4 LDO linear power supply reference circuit
