Rainbow Electronics MAX783 - Manual (Page 10)

MAX783
Triple-Output Power-Supply Controller
for Notebook Computers
10 ______________________________________________________________________________________
FB5
CS5
5V
PWM
CONTROLLER
(SEE FIG. 3)
DH5
BST5
LX5
DL5
SS5
FB3
CS3
3.3V
PWM
CONTROLLER
(SEE FIG. 3)
DH3
BST3
LX3
DL3
SS3
ON5
ON3
+5V LDO
LINEAR
REGULATOR
+3.3V
REFERENCE
300kHz/200kHz
OSCILLATOR
VDD
Q1
Q2
V+
VL
REF
GND
SYNC
VPPA
DA0
DA1
VPPB
DB0
DB1
D1
D2
VH
1.65V
1.65V
LINEAR
REGULATOR
LINEAR
REGULATOR
5V
3.3V
4.5V
STANDBY
4V
2.8V
13V TO 19V
FAULT
ON
ON
VDD REG
13V
19V
P
ON
PGND
SHDN
RDY5
MAX783
ON
Figure 2. Block Diagram