SC1409 데이터 시트보기 (PDF) - Semtech Corporation
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SC1409 Datasheet PDF : 8 Pages
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1 A Synchronous Switching Regulator SC1409
June 28, 2000
50
Phase
40
30
20
Gain
10
0
-10
100E+0
10E+3
1E+6
Frequency (Hz)
Error Amplifier, Gain and Phase
180
135
90
45
0
-45
-90
100E+6
0.0%
-0.2%
-0.4%
-0.6%
0.0
0.2
0.4
0.6
0.8
1.0
Io (A)
Load Regulation Characteristic
0.4%
0.2%
Vo=3.3V
Io=0.2A
Ta=25oC
0.0%
-0.2%
-0.4%
-0.6%
4.4
4.6
4.8
5.0
5.2
5.4
5.6
Vin (V)
Typical Line Regulation
90%
80%
70%
60%
0.0
0.2
Efficiency
25 mOhm
3.3V; f=300kHz
3.3V; f=500kHz
2.5V; f=300kHz
2.5V; f=500kHz
0.4
0.6
0.8
1.0
Io(A)
1.0
0.8
0.6
0.4
0.2
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
EN/SS Voltage (V)
Soft Start control of Vout
Ripple; Vo=3.3V; Io=1A; f=300kHz
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