Rainbow Electronics MAX782 - Manual (Page 10)

MAX782
Triple-Output Power-Supply
Controller for Notebook Computers
10 ______________________________________________________________________________________
FB3
CS3
3.3V
PWM
CONTROLLER
(SEE FIG. 3)
DH3
BST3
LX3
DL3
SS3
FB5
CS5
5V
PWM
CONTROLLER
(SEE FIG. 3)
DH5
BST5
LX5
DL5
SS5
ON3
ON5
+5V LDO
LINEAR
REGULATOR
+3.3V
REFERENCE
300kHz/200kHz
OSCILLATOR
VDD
Q3
Q2
Q1
V+
VL
REF
GND
SYNC
VPPA
DA0
DA1
VPPB
DB0
DB1
D3
D2
D1
VH
1.65V
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
Figure 2. MAX782 Block Diagram