SC1409 Semtech Corporation, SC1409 Datasheet - Page 5

• Manufacturer Part Number: SC1409
• Description: 1 A Synchronous Switching Regulator
• Manufacturer: Semtech Corporation

© 2000 SEMTECH CORP.
June 28, 2000
Quiescent current vs temperature
FET R
Soft start current vs temperature
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
50
45
40
35
30
25
20
15
10
5
0
-50
-50
-50
DS(ON)
-25
-25
-25
vs temperature
P-Channel (Topside)
Shutdown Quiescent Current
0
0
0
N-Channel (Bottomside)
Quiescent Current
Temperature (
Temperature (
Temperature (
25
25
25
50
o
50
50
C)
o
o
C)
C)
75
75
75
1 A Synchronous Switching Regulator
100
100
100
125
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
125
125
Frequency and max. duty cycle vs temperature
UVLO trip point vs temperature
Reference voltage vs temperature
652 MITCHELL ROAD NEWBURY PARK CA 91320
550
500
450
400
350
300
250
4.5
4.4
4.3
4.2
4.1
4.0
3.9
1.206
1.204
1.202
1.200
1.198
1.196
-50
-50
-50
-25
-25
-25
Frequency (FSET=V
0
0
Max Duty Cycle
0
V
Temperature (
IN
Temperature (
Increasing
25
Temperature (
25
V
Frequency (FSET=GND)
IN
25
Decreasing
50
50
IN
o
50
C)
)
o
C)
o
C)
75
75
75
100
100
100
SC1409
125
125
100
98
96
94
92
90
88
125
5