Power Supply Circuit/Reset Circuit - Panasonic KX-TGE210B Service Manual

KX-TGE210/KX-TGE212/KX-TGE232/KX-TGE233/KX-TGE234/TGEA20
4.5.5.

Power Supply Circuit/Reset Circuit

The power supply voltage from AC adaptor is converted to VBAT (3.0V) in IC302. And +3.0V for peripherals and analog part is
insulated from VBAT by Doubler of BBIC.
Circuit Operation:
+5.5V
+5.5V
AC Adaptor
+3.0V
IC302
3.0V
REGULATOR
VBAT
VDD1 (1.8 V)
Reset (RSTN)
(IC501_77pin)
Startmonitor
(IC501 57pin)
(CKM/STM)
VDD3
IC501
+3.0V
VDD1
BBIC
+1.8V
Q301
IC502
QSPI FLASH
RF Part
LEDs
BBIC chip initialize
14
VDD4
IC611
+3.0V_CP
EEPROM
VDD5
IC601
+3.0V_CP2
TAM FLASH