MAX796 Maxim, MAX796 Datasheet - Page 26

• Manufacturer Part Number: MAX796
• Description: Step-Down Controllers with Synchronous Rectifier for CPU Power
• Manufacturer: Maxim

Step-Down Controllers with
Synchronous Rectifier for CPU Power
Figure 12. +3.3V/+5V Dual-Output Application (MAX796)
Figure 13. ±5V Dual-Output Application (MAX799)
26
____________________________________________Application Circuits (continued)
(OPTIONAL)
ON/OFF
0.01 F
______________________________________________________________________________________
ON/OFF
6
1
33 F, 35V
1 F
SHDN
SS
5
6
10
GND
4
SYNC
SHDN
V+
22 F, 35V
3
MAX796
REF
SECFB
2
3
4
GND
REF
MAX799
11
107k, 1%
VL
0.33 F
11
1
SYNC
SS
VL
5
SECFB
2
PGND
0.01 F
(OPTIONAL)
CSH
BST
CSL
DH
DL
LX
FB
221k, 1%
PGND
V
CSH
BST
CSL
IN
DH
DL
V+
LX
FB
14
16
15
13
12
8
9
7
(8V TO 18V AS SHOWN)
16
14
15
13
12
8
9
7
10
1000pF
Q1-Q2 = Si9410 or EQUIVALENT
Q3 = Si9955 or EQUIVALENT (50V)
1/2 Si9936
1N4148
0.1 F
T1 = TRANSPOWER TTI5926
1N4148
0.1 F
Q1
Q2
1/2
Si9936
V
IN
(9V TO 18V)
1N5819
1N5819
4.7 F
4.7 F
T1 = TDK 1:1.5 TRANSFORMER
PC40EEM 12.7/13.7 - A160 CORE
BEM 12.7/13.7 BOBBIN
PRIMARY = 8 TURNS 24 AWG
SECONDARY = 12 TURNS 24 AWG
DESIGN FOR TIGHT MAGNETIC COUPLING
10 H
1:1.5
T1
MBR0502L
Q3
1N5817
EQ11FS1
102k, 1%
15 H
1:1.3
T1
100k, 1%
47 F
25m
22 F
10V
50m
102k
330 F
1%
49.9k
1%
-5.5V OUT
500mA
(-5.5V AT 200mA)
220 F
10V
AT 2A
+3.3V
+5V
33.2k
1%
AT
+5V OUT
(+5V AT 1A)