Rainbow Electronics MAX1635 - Manual (Page 24)

MAX1630–MAX1635
Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
24 ______________________________________________________________________________________
_______________________________________________________________________________Application Circuits
RESET
FB5
MAX1630
MAX1633
SHDN SYNC
INPUT
+5.2V TO +24V
PGND
SEQ
REF
11
9
15
12
13
14
20
19
17
16 Q3
Q4
L2 R2
C2
18
4
23 22
10 Ω
6 21
POWER-GOOD
7
10 8
5V ON/OFF
SKIP
V+ VL
DL5
LX5
DH5
BST5
2.2 µ F
0.1 µ F
0.1 µ F
0.1 µ F
1 µ F
0.1 µ F 4.7 µ F
2.7 µ F
1N5819
4.7 µ F
12OUT
C3
C4
+12V
AT 120mA
+5V OUTPUT (3A)
+5V
ALWAYS ON
GND
+2.5V REF
3
*
2
1
24
Q1
Q2
T1
1:4
C1
R1
5
0.1 µ F
0.1 µ F
1N5819
+3.3V
OUTPUT
(3A)
*
TIME/ON5
RUN/ON3
FB3
28
3V ON/OFF
26
25
27
CSL5
CSH5
CSL3
CSH3
DL3
LX3
DH3
BST3
V DD
ON/OFF
TO +3.3V OUTPUT TO +5V OUTPUT
R1 = R2 = 20m Ω
L2 = 10 µ H SUMIDA CDRH125-100
T1 = 10 µ H 1:4 TRANSFORMER
TRANSPOWER TECHNOLOGIES TTI-5902
Q1–Q4 = Si4410DY or IRF7413
C1 = 3 x 220
µ F 10V SPRAGUE 594D227X0010D2T
C2 = 2 x 220 µ F 10V SPRAGUE 594D227X0010D2T
C3 = C4 = 2 x 10 µ F 30V SANYO OS-CON 30SC10M
*VL DIODES AND OUTPUT SCHOTTKY DIODES REQUIRED
FOR THE MAX1630 ONLY (SEE
OUTPUT OVERVOLTAGE PROTECTION
AND OUTPUT UNDERVOLTAGE SHUTDOWN PROTECTION SECTIONS).
* *
Figure 8. Triple-Output Application for Low-Voltage Batteries (MAX1630/MAX1633)