LR1110
User Manual
Rev.1.0
UM.LR1110.W.APP
March 2020
77 of 130
Semtech
Figure 9-7: IDDTX vs
TxPower
, Low Power PA, DC-DC Configuration
Figure 9-8: IDDTX vs TxPower, Low Power PA, LDO Configuration
show the impact of the supply voltage for three
PaDutyCycle
settings (0, 4 and 7) in LDO configuration.
Similarly to the DC-DC configuration, we can notice that at a given supply voltage, a higher
PaDutyCycle
setting increases
the device current consumption. However, the supply voltage has no influence on the current consumption at a given
PaDutyCycle
setting, which means that the plots for 1.8 V, 3.3 V, and 3.7 V are superimposed.
show that the power efficiency of the Low Power PA is maximized when the internal DC-DC
regulator is used at or above 3.3V.
