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3. HW Circuit Description
3.14 Power Block Interface
There are 10 LDOs(Low Drop Output) regulators and 1 DC-DC converter in ABB chip.
The output of these 10 LDOs and 1 DC-DC converter is as following table.
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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table LDO Output Table
Output Voltage
Usage
VREXTL
1.8V/2.8V, 1.3V/1.03V
Digital Core of DBB
VREXTH
1.8V/2.8V
Peripheral Devices
VRMEM
1.8V
External Memory
VRMMC
1.8V/2.85V
RF
VRABB
2.8V
Analog Block of ABB
VRSIM
1.8V/2.85V
SIM Card Drive
VRUSB
3.3V
USB Block
VRPLL
1.4V/1.3V/1.05V
PLL Block
VRIO
1.8V
I/O Interface
VRWLED
20V
White LED Drive