Rainbow Electronics MAX1635 - Manual (Page 26)

MAX1630–MAX1635
Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
26 ______________________________________________________________________________________
OPEN
MAX1631
MAX1634
V+ SHDN VL SECFB
INPUT
+6V TO +24V
C3
10 Ω
ON/OFF
GND
REF SEQ SYNC
1 µ F
5V ALWAYS ON
Q1
ON/OFF
ON/OFF
0.1 µ F 0.1 µ F
4.7 µ F
4.7 µ F
0.1 µ F
Q3
DL3
CSH3
CSL3
FB3
RESET
RESET OUTPUT
SKIP
STEER
L1 R1
2.5V OUTPUT
C1
DL5
LX5
DH5
BST5 25
27
26
24
1
2
3
11
10
4
8
28
7
12
13
14
20
19
17
16
18
22 23 5 21
15 6 9
BST3
DH3
LX3
PGND
CSL5
CSH5
RUN/ON3
TIME/ON5
0 Ω
FB5
0.1 µ F
0.1 µ F
L2 R2
+3.3V OUTPUT
R1 = R2 = 15m Ω
L1 = L2 = 6.8 µ H SUMIDA CDRH 127-6R8MC
Q1 = Q4 = Si4410DY or 1RF7413
C1 = C2 = 2X SANYO OS-CON 10 SA220M
C3 = 4X SANYO OS-CON 30SC10M
*VL DIODES AND OUTPUT SCHOTTKY DIODES REQUIRED
FOR THE MAX1631 ONLY (SEE
OUTPUT OVERVOLTAGE PROTECTION
AND OUTPUT UNDERVOLTAGE SHUTDOWN PROTECTION SECTIONS).
*
* *
OPEN
0 Ω
* Q4
1N5819
Q2
1N5819
C2
Figure 10. Dual, 4A, Notebook Computer Power Supply
_____________________________________________________________Application Circuits (continued)