Nokia NSB-7 Series, Service Manual

Page: 34 / 308

NSB-7
System Module PAMS Technical Documentation
Page 20 ã Nokia Mobile Phones Ltd. Issue 1 06/00
NOTE: COBBA regulator is off in SLEEP mode. Its output pin may be fed from V
BB
in SLEEP mode by setting bit RFReg(5) to’1’ (default).
CCONT includes also five additional 2.8V regulators providing power to the RF section.
These regulators can be controlled either by the direct control signals from MAD or by
the RF regulator control register in CCONT which MAD can update. Below are the listed
the MAD control lines and the regulators they are controlling.
- TxPwr controls VTX regulator (VR5)
- RxPwr controls
VRX regulator (VR2)
- SynthPwr controls all the rf regulators except VR1
- VCXOPwr controls VXO regulator (VR1)
CCONT generates also a 1.5 V reference voltage VREF to COBBA. The VREF voltage is also
used as a reference to some of the CCONT A/D converters.
In addition to the above mentioned signals MAD includes also TXP control signal which
goes to HAGAR power control block
. The transmitter power control TXC is led from
COBBA to HAGAR.
Characteristics Condition Min Typ Max Unit
Output current VR1-VR6 Vout@2.8V 100 mA
Output current VR7
Depends on external BJT Vout@2.8V 150 mA
Output current VR7BASE
Base current limit Vout@2.8V -10 mA
Output current VBB On
Current limit 250mA
Output current VBB Sleep
Current limit 5mA Vout@2.8V
Vout@2.8V
125
1
mA
mA
Output voltage VR1-VR7 over full temperature, input
voltage and load range 2.7 2.8 2.85 V
Output voltage VBB over full temperature, input
voltage and load range 2.7 2.8 2.85 V
Output voltage V2V
(VCORE) Programmable:
Vout=1.3V+225mV*n
N = 0,1,2,3,4,5,6 1.30 2.65 V
Output voltage V2V
(VCORE) tolerance -5 +5 %
Line regulation (not VBB) F
v
10kHz, 2)
VBAT>3.15V
49 DB