LG LG-A270 - Tools; Torch and FM Radio Usage

3. TECHNICAL BRIEF
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Copyright © 2012 LG Electronics. Inc. All right reserved.
O nly for training and service purposes
LGE Internal Use Only
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3. TECHNICAL BRIEF
Table. 3.2.2 Power supply Domains
 SIM LDO (VSIM1,2)
The SIM LDO is a linear regulator that could source 100mA (max) with 1.8V or 3.0V output
 USB LDO (VUSB)
The USB LDO is a linear regulator that could source 50mA (max) with 3.3V output dedicated
for USB circuitry.
 FM LDO (VFM)
The VFM LDO is a linear regulator that could source 40mA (max) with 2.8V output for internal FM chip.
 VIBR LDO (VIBR)
The VIBR LDO is a linear regulator that could source 200mA (max) with 1.3V, 1.5V, 1.8V, 2.5V, 2.8V,
3.0V or 3.3V output for Vibrator.
Type LDO name Vout(V) Imax(mA) Description
ALDO VRF 2.8 200 RF chip
ALDO VA 2.8 150 Analog baseband
ALDO VTCXO 2.8 40 13/26 MHz reference clock
ALDO VFM 2.8 40 FM Chip power
DLDO VIO28 2.8 200 Digital IO
DLDO VSIM 1.8/3.0 100 SIM card
DLDO VSIM2
1.3/1.5/1.8/2.5
2.8/3.0/3.3
50 SIM card
DLDO VUSB 3.3 50 USB
DLDO VIO18 1.8 200 Digtal IO
DLDO VIBR
1.3/1.5/1.8/2.5
2.8/3.0/3.3
200 Vibrator
DLDO VSF 1.8/3 50 Serial ash power
RTCLDO VRTC 2.8 2 Real-time clock
Table.3.2.2 Power supply Comains