Baseband/Rf Regulators; Baseband Regulators - Nokia 6265 Baseband Description And Troubleshooting

6265/6265i/6268 (RM-66)
Baseband Description and Troubleshooting

Baseband/RF Regulators

Baseband Regulators

The baseband circuitry for the 6265/6265i/6268 is powered from five different UEMEK
regulators: VANA, VIO, VFLASH1, VAUX, and VCORE DC/DC. See
levels.
Regulator
VCORE DC/DC
VIO
VFLASH 1
VAUX 2
VANA
VSIM
Baseband/RF Regulators
The following are voltage regulators from the UEMEK to the RF circuit.A charge pump
used by VR1A is constructed around UEMEK. The charge pump provides a 4.75V
regulated output to the RF block. See
Regulator
VR1A
VR1B
VR2
VR3
VR4
VR5
VR6
VR7
VREF RF1
Page 8
Table 1: Baseband regulators
Maximum
Vout
current
(V)
(mA)
300 1.35
150 1.8
70 2.78
70 2.78
80 2.78
25 3.0
Table 2: Baseband/RF regulators
Maximum
Vout
current
(V)
(mA)
10 4.75
10 4.75
100 2.78
20 2.78
50 2.78
50 2.78
50 2.78
45 2.78
--- 1.35
©2005 Nokia Corporation
Notes
Output voltage selectable 1.03V - 1.57V
2 modes: Normal 1.35V, Sleep 1.03V
Enabled always, except during power-off mode
Enabled always, except during power-off mode
Enabled when smart accessories are connected
Enabled only when the system is awake (Off
during sleep and power-off modes)
Enabled when UIM card is detected
Figure 3 for regulator levels.
Notes
Enabled when receiver is on
Enabled when transmitter is on
Enabled when transmitter is on
Enabled when SleepX is high
Enabled when receiver is on
Enabled when receiver is on
Enabled when transmitter is on
Enabled when receiver is on
Provides voltage reference prior to EM calibration
Company Confidential
Figure 3 for regulator
Issue 1 11/2005