Users Manual Part 1

SIM8260A_Hardware Design_V1.05
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Figure 9: Switching mode power supply reference circuit for mmW

In order to avoid damaging the module, please do not switch off the power supply when module
works normally. Only after the module is shut down by PWRKEY or AT command, then the power
supply can be cut off.

It is suggested that customer's design should have the ability to switch off the power supply for
module in abnormal state, and then switch on the power to restart the module.

The PWR_CTRL signal recommend connect to the host and can be controlled.
Table 12: Recommended chip list
Name
Manufacturer
Model
Ferrite bead
Sunlord
UPZ1608E300-5R0TF
Power inductor
Coilcraft
XAL1010-451ME
3.1.3 Voltage Monitor
To monitor the VBAT voltage, the AT command “AT+CBC” can be used.
 For more details about voltage monitor commands, please refer to Document [1] in the appendix.
NOTE
NOTE