Regulators And Power Supply Concept - Nokia RM-761 Service Manual

RM-761; RM-799; RM-800
System Module
Version
EU
LATAM

Regulators and power supply concept

In the X-GOLD213 IC, VRF1 and VDD1V8 are the regulated output voltages of the DCDC step down converter
and supply the RF, the digital core, and the analogue part. The remaining regulators are supplied by the
battery directly for increasing the efficiency.
The following figure shows the power concept of the X-GOLD213 IC RF sub-system.
In the following table, the RF power supply names, IC ball numbers, description for use, and at which
components the supply voltage can be measured at are listed.
Name
VBAT
VDDRF2
VRF1
VDDTRX
Issue 1
Table 4 Quantum Frequency Plan
Band
GSM900
GSM1800
GSM850
GSM1900
Figure 69 Power concepts for X-GOLD213 RF sub-system
Table 5 Power supply voltages for the X-GOLD213 IC RF sub-system
Ball No.
G14
G13
H10
B14
COMPANY CONFIDENTIAL
Copyright © 2011 Nokia. All rights reserved.
Frequency Plan
TX: 880-915MHz
RX: 925-960MHz
TX: 1710-1785MHz
RX: 1805-1880MHz
TX: 824 - 849 MHz
RX: 869 - 894 MHz
TX: 1850 - 1910 MHz
RX: 1930 - 1990 MHz
Test point
C7134 3.6V typ. Battery voltage, supply voltage of
D2B LDO
C7106 2.5V D2B output voltage, part of RF supply
C7121 1.8V DCDC output voltage, supply of 1.3V
LDOs
C7124 1.4V Transceiver supply
GMSK Power Class
4 (Max PCL5 = 33dBm)
1 (Max PCL0 = 30dBm)
4 (Max PCL5 = 33dBm)
1 (Max PCL1 = 30dBm)
Function
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