Trip le -Ou t p u t P o w e r-S u p p ly
Co n t ro lle r fo r No t e b o o k Co m p u t e rs
+5V LDO
V+
LINEAR
P
FB3
CS3
BST3
DH3
LX3
DL3
SS3
REGULATOR
3.3V
PWM
CONTROLLER
(SEE FIG. 3)
5V
VL
4.5V
3.3V
+3.3V
MAX782
REF
REFERENCE
ON
PGND
ON3
GND
4V
FAULT
FB5
CS5
2.8V
5V
PWM
CONTROLLER
(SEE FIG. 3)
BST5
DH5
LX5
STANDBY
300kHz/200kHz
SYNC
ON
OSCILLATOR
DL5
SS5
VPPA
DA0
DA1
ON
LINEAR
REGULATOR
VPPB
DB0
DB1
LINEAR
REGULATOR
ON5
13V
VDD REG
VDD
Q3
13V TO 19V
19V
D3
D2
1.65V
Q2
Q1
1.65V
1.65V
D1
VH
Figure 2. MAX782 Block Diagram
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