Rainbow Electronics MAX781 - Manual (Page 9)

VPP LINEAR
REGULATORS
BIAS
GEN
+3.3V LINEAR
REGULATOR
VCHG
BATT
UVLO
SHDN
AGND
CE
SCLK
DIN
AUXIN
AOUT
TEMP
2.5V
REFERENCE
+3.3V SWITCHING
REGULATOR
SERIAL INTERFACE
AVPP1 IDLE MODE0 MODE1 50N AVPP0 BVPP0 BVPP1
BATTSTAT
MUX_
MUXON GDSEL_
GDON CHG_
CHGON
BST
SS
CS3
3OUT
REF
DHI
LX
DLO
PGND
SYNC
VHI
VPPA
VPPB
INT
DOUT
FAST
DCHG
COMP
CSBAT
INREG
CHGSTAT UNDERVOLTAGE
3VSTAT
+5V LINEAR
REGULATOR
GATE
DRIVERS
5
5 3 7
BATTERY
CHARGER
ANALOG
MULTIPLEXER
MAX781
PDA/Hand-Held Computer Power Controller
_______________________________________________________________________________________ 9
Figure 2. MAX781 Block Diagram