SC1480
POWER MANAGEMENT
Typical Characteristic (Cont.)
SC1480EVB Efficiency at VOUT = 1.25V
SC1480EVB Line Regulation at VOUT = 1.25V
100
0.6
0.5
0.4
0.3
0.2
0.1
0
95
90
85
80
75
IOUT=0A
IOUT=1A
IOUT=2A
IOUT=3A
IOUT=4A
IOUT=5A
VIN=25V
70
65
60
VIN=14V
VIN=4.5V
0.1
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
4.5
10
14
19
25
Output Current (Amps)
Input Voltage (Volts)
Frequency vs. Input Voltage
(IOUT = 1A, VOUT = 1.25V, Rton = 1M)
SC1480EVB Load Regulation at VOUT = 1.25V
0.6
0.5
0.4
0.3
0.2
0.1
0
280
270
260
250
240
230
220
210
200
VIN=4.5V
VIN=10V
VIN=14V
VIN=19V
VIN=25V
0
1
2
3
4
5
5
10
15
20
25
Load Current (Amps)
Input Voltage (Volts)
Frequency vs. Load Current
Rton vs. Frequency
(VIN = 15V, VOUT = 1.25V, Rton = 1M)
(VIN = 15V, VOUT = 1.25V, IOUT = 1A)
290
280
270
260
250
240
230
220
210
200
600
500
400
300
200
100
0
400
500
600
700
800
1000
1500
0
1
2
3
4
5
6
Load Current (Amps)
Rton (kohms)
2006 Semtech Corp.
19
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
