Power Management; Power On Sequence - LG C3400 Service Manual

3.6.5 Power Management

1.8 V, 80 mA
1.8 or 2.8 V, 150 mA
2.8 V, 200 mA
1.8 or 2.85 V, 20 mA
1.8 V, 20 ) A
1.8 or 2.8 V, 50 mA
1. Power up sequence logic
1. The AD6535 controls power on sequence

2. Power on sequence

- If a battery is inserted,the battery powers the 11 LDOs.
- Then if PWRONKEY is detected,the LDOs output turn on.
- REFOUT is also enabled
- Reset is generated and send to the AD6527B
AD6535
CSFS
Control
CSDI
Serial
CSDO Port
VCOREIN
Digital Core
LDO Regulator
VCORE
VMEMIN
Memory Interface
LDO Regulator
VMEM
External Interface
VEXT
LDO Regulator
SIM Interface
VSIM
LDO Regulator
VRTCIN
RTC
LDO Regulator
VRTC
Backup Battery
VBACK
LDO Regulator
VCXOEN
Regulator
Control
DBBON
RESET
Figure 3-16.AD6535 POWER MANAGEMENT SECTION
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3. TECHNICAL BRIEF
Baseband Analog
VABB
LDO Regulator
Microphone
VMIC
LDO Regulator
VCXO
VVCXO
LDO Regulator
VAPPGATE
Application
LDO Regulator
VAPP
VUSBIN
USB Interface
LDO Regulator
VUSB
VCHG
CHGOSC
Battery
GATEDRIVE
Charger
CHGDACREF
BATTYPE
ISENSE
KEYON
KEYOUT
LDOEN
Power-On
CRST
Reset Generator
2.5 V, 2 mA
2.75 V, 10 mA
1.8 or 3 V, 250 mA
3.3 V, 15 mA