Power Supply Circuit/Reset Circuit - Panasonic KX-PRL260B Service Manual

KX-PRL260/KX-PRL262/KX-PRD260/KX-PRD262/KX-PRLA20
4.5.6.

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
IC411
5.0V
REGULATOR
VBAT
1.8 V
Reset (RSTN)
(IC501_77pin)
Startmonitor
(IC501 57pin)
(CKM/STM)
VDD2
IC501
+3.0V
VDD1
BBIC
+1.8V
Q301
IC502
QSPI FLASH
RF Part
LEDs
IC721
+1.8V
Bluetooth
IC722
unit
BBIC chip initialize
14
VDD4
IC611
+3.0V_CP
EEPROM
VDD5
IC601
+3.0V_CP2
TAM FLASH
VDD3
IC401
D-AMP