SS6578 ETC-unknow, SS6578 Datasheet - Page 6

• Manufacturer Part Number: SS6578
• Description: High Efficiency Step Down Dc/dc Controller
• Manufacturer: ETC-unknow

Rev.2.02 4/06/2004
APPLICATION EXAMPLES
V
V
V
V
**R1 value is based on the
current rating of D2
5V
5V
IN
IN
IN
IN
>15V, R7=15
>15V, R7=15
27.4K
15V, R7=0
R2
15V, R7=0
VIN
DUTY
SHDN
FB
VIN
DUTY
SHDN
FB
15.4K
R2
SS6578
SS6578
GND
CS+
CS-
DRI
GND
CS+
CS-
DRI
47K
RS
47K
R1
R1
6.8V
D2
RS
R1**
680
*R7
GS SS32
GS SS32
R7
D1
D1
*:Sumida MPP Core
*:Sumida MPP Core
C2
C2
Fig. 8 3.3V Step-Down Converter
Q1
Fig. 7 5V Step-Down Converter
www.SiliconStandard.com
Q1
33 H
+
+
33 H
*L1
*L1
C1
330 F
C1
330 F
C3
C3
V
6.4 ~ 18V
V
12 ~ 18V
IN
IN
+
+
V
OUT
V
OUT
95
100
90
85
80
75
95
90
85
80
10
10
V
V
IN
=6.4
Efficiency vs. Load Current
Efficiency vs. Load Current
Load Current (mA)
Load Current (mA)
V
V
IN
V
=16
IN
100
10
=9V
V
IN
=16V
V
V
OUT
OUT
=5V
=3.3
1000
1000
V
SS6578
6 of 11