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SC4624 Datasheet(PDF) 6 Page - Semtech Corporation

No. de pieza SC4624
Descripción Electrónicos  Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator
PDF  20 Pages
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Fabricante Electrónico  SEMTECH [Semtech Corporation]
Página de inicio  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4624 Datasheet(HTML) 6 Page - Semtech Corporation

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 2007 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC4624
Operation
Typical Performance Characteristics
Typical Performance Characteristics
Figure 3. Shutdown by V
IN@0A
Figure 4. Shutdown by V
IN@4A
Figure 5. Transient Response@ 0 to 4A
Figure 6. Ripple and Stability@4A
Figure 1. Start Up by V
IN@0A
Figure 2. Start Up by V
IN@4A
Circuit condition: Application circuit#1, 5V
IN, 1VOUT
Vin
Vout
Start up by Vin
Test condition: 5Vin, 1Vo, Io=0A
PGOOD
SS
V
IN
SS
V
OUT
PGOOD
2.5V/DIV
2.5V/DIV
2.5V/DIV
0.5V/DIV
10ms/DIV
2.5V/DIV
2.5V/DIV
0.5V/DIV
2.5V/DIV
Vin
Vout
Start up by Vin
Test condition: 5Vin, 1Vo, Io=0A
PGOOD
SS
V
IN
SS
V
OUT
PGOOD
10ms/DIV
Vin
Vout
Shutdown by Vin
Test condition: 5Vin, 1Vo, Io=0A
PGOOD
SS
2.5V/DIV
2.5V/DIV
2.5V/DIV
0.5V/DIV
V
IN
SS
V
OUT
PGOOD
5ms/DIV
Vin
Vout
Shutdown by Vin
Test condition: 5Vin, 1Vo, Io=4A
PGOOD
SS
2.5V/DIV
2.5V/DIV
2.5V/DIV
0.5V/DIV
V
IN
SS
V
OUT
PGOOD
1ms/DIV
Transient response
Test condition: 5Vin, 1Vo, Io=0 to 4A
R=F=2.5A/us,T1=T2=0.1ms
Io
Vout
Vout
IOUT
V
OUT
l
OUT
2A/DIV
50mV/DIV
20us/DIV
V
OUT
V
PHASE
20mV/DIV
2.0V/DIV
Stability and Ripple
Vphase
Vout
Test condition: 5Vin, 1Vo, Io=4A,
(Operating stably)
1us/DIV



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