Rainbow Electronics MAX1635 - Manual (Page 25)

MAX1630–MAX1635
Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
______________________________________________________________________________________ 25
_____________________________________________________________Application Circuits (continued)
2.2 µ F
5
RESET
FB5
MAX1632
MAX1635
PGND
SEQ
REF
11
9
15
12
13
14
20
19
17
16 Q3
Q4
T2
1:2.2
R2
D5
D2
18
POWER-GOOD
7
10 8
5V ON/OFF
SKIP
DL5
LX5
DH5
BST5
V DD
2.2 µ F
0.1 µ F
C2
0.1 µ F
1 µ F
1N5819
+5V OUTPUT (3A)
GND
+2.5V REF
3
*
2
1
24
Q1
D1
Q2
L1
R1
0.1 µ F
0.1 µ F
1N5819
+3.3V OUTPUT (3A)
ON/OFF
*
TIME/ON5
RUN/ON3
FB3
28
3V ON/OFF
26
25
27
CSL5
CSH5
CSL3
CSH3
DL3
LX3
DH3
BST3
SHDN SYNC
INPUT
+6.5V TO +28V
4
23 22
10 Ω
6 21
V+ VL
0.1 µ F
0.1 µ F 4.7 µ F
4.7 µ F
12OUT
C3
C1
C4
TO +3.3V OUTPUT TO +5V OUTPUT
+12V AT 120mA
+5V ALWAYS ON
R1 = R2 = 20m Ω
L1 = 10 µ H SUMIDA CDRH125-100
T2 = 10 µ H 1:2.2 TRANSFORMER
TRANSPOWER TECHNOLOGIES TTI-5870
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 MAX1632 ONLY (SEE
OUTPUT OVERVOLTAGE PROTECTION
AND OUTPUT UNDERVOLTAGE SHUTDOWN PROTECTION SECTIONS).
* *
Figure 9. Triple-Output Application for High-Voltage Batteries (MAX1632/MAX1635)