User Guide

RH-21 Company Confidential
System Module Nokia Customer Care
Page 8  2004 Nokia Corporation. Issue 2 07/2004
Reference voltages for regulators require external 1uF capacitors. Vref25RF is reference
voltage for VR2 regulator, Vref25BB is reference voltage for VANA, VFLASH1, VFLASH2,
VR1 regulators, Vref278 is reference voltage for VR3, VR4, VR5, VR6, VR7 regulators,
VrefRF01 is reference voltage for VIO, VCORE, VSIM regulators, and for RF.
VANA regulator supplies internal and external analog circuitry of BB. It is disabled in
sleep mode.
Vflash1 regulator supplies LCD, IR-module and digital parts of UEM and Safari asic. It is
enabled during startup and goes to low Iq-mode in sleep mode.
Vflash2 regulator is not used.
VIO regulator supplies both external and internal logic circuitries. It's used by LCD, flash,
and UPP. Regulator goes in to low Iq-mode in sleep mode.
VCORE regulator supplies DSP and Core part of UPP. Voltage is programmable and the
start-up default is 1.5V. Regulator goes to low Iq-mode in sleep mode.
VSIM regulator is not used.
VR1 regulator uses two LDOs and a charge pump. Charge pump requires one external 1uF
capacitor in Vpump pin and 220nF flying capacitor between pins CCP and CCN. VR1 reg-
ulator is used by Safari RF ASIC.
VR2 regulator is used to supply external RF parts, lower band up converter, TX power
detector module, and Safari. In light load situations, VR2 regulator can be set to low
Iq-mode.
BB RF Current
VANA: 2.78Vtyp 80mAmax VR1a:4.75V 10mAmax
VR1b:4.75V
IPA1: 0-5mA
Vflash1: 2.78Vtyp 70mAmax IPA2: 0-5mA
Vflash2: 2.78Vtyp
40mAmax
VR2:2.78V 100mAmax
VSim: 1.8/3.0V 25mAmax VR3:2.78V 20mA
VIO: 1.8Vtyp
150mAmax
VR4: 2.78V 50mAmax
Vcore: 1.0-1.8V
200mAmax
VR5: 2.78V 50mAmax
VR6: 2.78V 50mAmax
VR7: 2.78V 45mAmax