User Guide

NSD-5
3. System Module PAMS Technical Documentation
Page 28 Nokia Corporation Issue 1 05/02
function power management ASIC which has seven 2.8V linear regulators for the RF sec-
tion of the phone. One 2.8V regulator is used to power up the baseband of the phone.
Additionally, one adjustable regulator can be used to power up certain parts of the base-
band. There also is a 5V charge pump, 5V regulator, and 3/5V regulator.
The main functions of CCONT are: voltage regulation, power up/down procedures, reset
logic, charging control (PWM), watchdog, sleep control, A/D conversion, and a real time
clock.
- Six user-controlled, 2.8V regulators
- Baseband regulator
- Programmable output voltage regulator for MAD core
- Voltage reference
- 32kHz oscillator and real-time clock
- +5V output
- 3V/5V switchable output
- Power-up control circuits, power-on reset
- Charger control circuits
- Charging switch and regulator
- 10-bit 8 input A/D converter (9 inputs with temp MUX)
- Serial bus control of all functions
- Alarm clock and charger interrupt
- Battery interface
CCONT Regulators
Battery voltage (VBAT) is connected to CCONT, regulating all the supply voltages (VBB,
VR1-VR7, VMAD, VR1_SW, VSIM, and V5V). CCONT default start-up mode turns on VR1,
VBB, VMAD, VR6, and Vref during power-up.
VMAD provides the MAD4 ASIC with a lower core voltage. VMAD is connected to those
pins on MAD4 that power the core.
During the sleep mode, most regulators are turned off except VBB and VR6 (when VBAT
is higher than 3.0V). During this period, VR6 is switched from VBB since VBB is supplying
power for VR6. For more information about RF power distribution, see Reference 5.
The maximum total output current from CCONT is 330mA (not including VR7). This is due
to thermal considerations at maximum battery voltage during charging. However, during
TX, when most outputs are enabled, the maximum current of each regulator can be
obtained. Software limits the average battery voltage to 3.8V (minimal charging).
Table 7 defines the regulator outputs of CCONT.
Output Control signal To
Noise level
(nVrms/℘Hz)
Max
current
(mA)
Range (Voltage)
Min Typ Max
VR1 CLK_EN OR
CtrlReg1(0)
Synthesizer 200 80 2.67 2.80 2.85