Error! No text of specified style in document. - System Integration Manual
CDMA-2X-11004-P1
Objective Specification
System description
Page 17 of 79
5.3
Power management
5.3.1
Power supply circuit overview
Error! No text of specified style in document. modules feature a power management concept
optimized for the most efficient use of supplied power. This is achieved by hardware design utilizing
a power efficient circuit topology (Figure 2), and by power management software controlling the
module’s power saving mode.
Baseband Processor
Switching
Step-Down
u-blox C200
42 µF
VCC
VSIM
V_INT
2 x 3G Pow er Amplifier(s)
Linear
LDO
Linear
LDO
Switching
Step-Down
Linear
LDO
Linear
LDO
Linear
LDO
I/O
EBU
CORE
Analog
SIM
RTC
NOR Flash
DDR SRAM
RF Transceiver
M emory
Pow er M anagement Unit
4.7 µF
2.2 µF
VCC
VCC
Figure 2: Power management simplified block diagram
Pins with supply function are reported in Table 3.
