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SC2447 Datasheet(PDF) 7 Page - Semtech Corporation

Part # SC2447
Description  Dual-Phase, Single or Dual Output Synchronous Step-Down Controller
PDF  26 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2447 Datasheet(HTML) 7 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2447
Typical Application Circuit Performance
Circuit Conditions: 2-Output Configuration as in Figure 16. V
IN = 12V, VOUT1 = 2.5V, VOUT2 = 1.2V, ROSC = 51.1kΩ, SYNC = 0, and TA = 25°C.
V
OUT1
1V/div
V
SS1/EN1
2V/div
I
OUT1
10A/div
Soft-Start Up (V
OUT1)
10ms/div
V
OUT1
1V/div
V
SS1/EN1
2V/div
Pre-biased Start Up (V
OUT1)
10ms/div
I
OUT1=0A
V
OUT1
0.1V/div
Load Transient Response (V
OUT1)
200
µs/div
I
OUT1=15A to 20A
I
OUT1
5A/div
V
OUT1
20mV/div
Output Voltage Ripple (V
OUT1)
2
µs/DIV
I
OUT1=20A
I
OUT1
10A/div
V
SW1
10V/div
V
OUT1
1V/div
Overload Hiccup (V
OUT1)
50ms/div
V
SS1/EN1
2V/div
I
OUT1
20A/div
V
OUT1
1V/div
V
SS1/EN1
5V/div
Shutdown (V
OUT1)
R
OUT1=1Ω
V
GDL1
5V/div
I
OUT1
2A/div
200
µs/div
V
OUT2
0.5V/div
V
SS2/EN2
2V/div
I
OUT2
20A/div
Soft-Start Up (V
OUT2)
10ms/div
V
OUT2
0.5V/div
V
SS2/EN2
2V/div
Pre-biased Start Up (V
OUT2)
10ms/div
I
OUT2=0A
I
OUT2
20A/div
V
OUT2
0.5V/div
V
SS2/EN2
5V/div
Shutdown (V
OUT2)
R
OUT2=1Ω
V
GDL2
5V/div
I
OUT2
1A/div
200
µs/div



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