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
_______________________________________________________________________________Ap p lic a t io n Circ u it s
*
*
TO +3.3V OUTPUT
TO +5V OUTPUT
C4
INPUT
+5.2V TO +24V
C3
10Ω
0.1µF
4.7µF
+5V
ALWAYS ON
ON/OFF
4.7µF
0.1µF
0.1µF
23 22
6
21
VL
V+
SHDN
SYNC
5
4
+12V
AT 120mA
12OUT
V
DD
2.2µF
25
27
18
16
2.7µF
BST3
DH3
BST5
DH5
Q3
Q1
C1
L2
R2
+5V OUTPUT (3A)
C2
+3.3V
OUTPUT
(3A)
0–MAX1635
0.1µF
0.1µF
Q4
26
24
17
19
T1
1:4
LX5
DL5
R1
LX3
DL3
MAX1630
MAX1633
0.1µF
*
*
Q2
20
14
PGND
1N5819
1N5819
1
CSH3
CSL3
FB3
CSH5
CSL5
FB5
13
12
2
3
15
9
28
7
3V ON/OFF
SEQ
REF
RUN/ON3
TIME/ON5
+2.5V REF
5V ON/OFF
1µF
11
RESET
POWER-GOOD
SKIP
10
GND
8
R1 = R2 = 20mΩ
L2 = 10µH SUMIDA CDRH125-100
T1 = 10µH 1:4 TRANSFORMER
TRANSPOWER TECHNOLOGIES TTI-5902
Q1–Q4 = Si4410DY or IRF7413
C1 = 3 x 220µF 10V SPRAGUE 594D227X0010D2T
C2 = 2 x 220µF 10V SPRAGUE 594D227X0010D2T
C3 = C4 = 2 x 10µF 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)
24 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
