User's Manual

UM-B-036
DA14580 Antenna module for QFN48 package
User manual
Revision 2.0
10
-
Dec
-
2014
CFR0012-00 Rev 1 12 of 34 © 2014
Dialog Semiconductor
Power management 4.8
The QFN48 antenna module is supplied by a single power supply via pin 27 (VBAT). The supply
voltage of the module follows the specification of the DA14580 IC in buck configuration. The supply
voltage ranges from 2.4 V to 3.6 V.
Embedded in the DA14580, the DC/DC converter and LDOs produce all voltages required for the
system operation. The DC/DC converter is supplied from V
BAT
through a bead (FB1) and produces
1.4 V that feeds the internal LDOs. The LDOs supply the digital, analog and RF sections of the chip
with 1.2 V. Finally, the I/O ring is supplied from V
BAT
.
FB1
VBAT
C3
QFN48 Antenna module
Figure 4: Power management, DC/DC converter in buck configuration
The overall current consumption of the QFN48 antenna module in transmit mode is in the range of 5
mA, whereas in sleep mode the consumption is in the range of 2 µA. See Figure 5.
Figure 5: Current consumption during an Advertising frame