Mu lt i-Ou t p u t , Lo w -No is e P o w e r-S u p p ly
Co n t ro lle rs fo r No t e b o o k Co m p u t e rs
INPUT
SHDN
V+ SYNC
CSL5
-
MAX1632
+
4.5V
ON/OFF
5V
LINEAR
REG
12OUT
+12V
12V
LINEAR
REG
+5V ALWAYS ON
VL
IN
V
DD
REF
SECFB
+
-
2.5V
REF
13V
RAW +15V
BST3
BST5
DH3
LX3
DH5
LX5
0–MAX1635
3.3V
PWM
LOGIC
5V
PWM
LOGIC
200kHz
+5V
+3.3V
TO
300kHz
OSC
VL
VL
DL3
DL5
PGND
OV/UV
FAULT
CSH3
CSL3
+
-
CSH5
CSL5
REF
REF
-
+
LPF
60kHz
LPF
60kHz
1.75V
2.68V
2.388V
-
R1
R2
-
R3
FB3
FB5
OUTPUTS
UP
-
-
R4
+
+
0.6V
0.6V
RESET
SEQ
VL
TIMER
2.6V
-
TIME/ON5
+
+
POWER-ON
SEQUENCE
LOGIC
REF
-
+
1V
-
RUN/ON3
GND
Figure 2. MAX1632 Block Diagram
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
