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During the high power PA operation, the DC-DC supplies the analog and digital core of the devices, whereas the PA itself
-the largest power consumption contributor- is supplied directly from VBAT. Therefore, there is no significant current
consumption difference between the DC-DC or the LDO modes during the high power PA operation.
Figure 9-10: IDDTX vs TxPower, High Power PA, DC-DC Configuration
Figure 9-11: IDDTX vs TxPower, High Power PA, LDO Configuration
LR1121
User Manual
Rev 1.1
UM.LR1121.W.APP
Mar 2023
www.semtech.com
93 of 130
Semtech
Proprietary & Confidential
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