Power Block Interface - LG KG270 Service Manual

3. TECHNICAL BRIEF

3.14 Power Block Interface

(1608)
The E-GOLDvoice integrated power management unit (PMU) supports direct connection to battery
(DCB). That means all supply voltages needed are generated on-chip with integrated linear voltage
regulators. The input of these linear voltage regulators is the battery voltage. The external memory and
SIM card supply is provided by the on-chip voltage regulators. Table 144 is an overview of the internal
generated supply voltages.
The integrated power management also provides the control state machine for system start up,
including start up with discharged batteries, trickle charging and system reset control. After system
start up several methods are implemented for active and idle power saving.
LGE Internal Use Only
3V2_VBUF
2V0_VRTC
C113
L102
1u
18nH
Figure 3-14-1 Power Block interface
- 40 -
R100
6.8K
BAT100
D12
REXT
A9
XOX
A8
XO
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VRF1
C111
1u
VBAT
C115
(1608)
2.2u
(16V,K,X5R)