Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
MAX1630–MAX1635
INPUT
SHDN
CSL5
-
+
4.5V
V+
SYNC
MAX1632
ON/OFF
+5V ALWAYS ON
VL
5V
LINEAR
REG
12V
LINEAR
REG
12OUT
IN
V
DD
13V
BST5
DH5
VL
3.3V
PWM
LOGIC
200kHz
TO
300kHz
OSC
5V
PWM
LOGIC
LX5
VL
DL5
PGND
+5V
RAW +15V
+12V
REF
BST3
DH3
+3.3V
LX3
DL3
2.5V
REF
SECFB
+
-
OV/UV
FAULT
REF
LPF
60kHz
1.75V
2.68V
2.388V
-
-
+
R1
FB3
-
R2
R3
FB5
-
R4
+
REF
LPF
60kHz
-
+
-
+
0.6V
VL
TIMER
2.6V
SEQ
1V
GND
RESET
+
+
0.6V
REF
+
-
CSH3
CSL3
CSH5
CSL5
OUTPUTS
UP
TIME/ON5
RUN/ON3
Figure 2. MAX1632 Block Diagram
10
______________________________________________________________________________________
+
POWER-ON
SEQUENCE
LOGIC
+
-
-