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SC194B Datasheet(PDF) 11 Page - Semtech Corporation

Part # SC194B
Description  Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter
PDF  17 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC194B Datasheet(HTML) 11 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC194B
POWER MANAGEMENT
Efficiency vs. Load Current V
OUT = 3.6V
Efficiency vs. Load Current V
OUT = 3.3V
Efficiency vs. Load Current V
OUT = 2.5V
Efficiency vs. Input Voltage V
OUT = 3.3V
Efficiency vs. Load Current V
OUT = 3.0V
Typical Characteristics
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.001
0.01
0.1
1
10
IOUT (A)
VIN=3.9V, PSAVE
VIN=4.2V, PSAVE
VIN=5.0V, PSAVE
VIN=3.9V, PWM
VIN=5.0V, PWM
VIN=4.2V, PWM
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.001
0.01
0.1
1
10
IOUT (A)
VIN=4.2V, PWM
VIN=3.9V, PWM
VIN=5.0V, PWM
VIN=3.9V, PSAVE
VIN=4.2V, PSAVE
VIN=5.0V, PSAVE
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.001
0.01
0.1
1
10
IOUT (A)
VIN=3.6V, PSAVE
VIN=4.2V, PWM
VIN=4.2V, PSAVE
VIN=5.0V, PSAVE
VIN=3.6V, PWM
VIN=5.0V, PWM
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.001
0.01
0.1
1
10
IOUT (A)
VIN=5.0V, PWM
VIN=3.3V, PSAVE
VIN=4.2V, PSAVE
VIN=5.0V, PSAVE
VIN=4.2V, PWM
VIN=3.3V, PWM
70
75
80
85
90
95
100
2.5
3
3.5
4
4.5
5
5.5
6
Vin (V)
VOUT=3.3V,PWM
VOUT=2.5V,PWM
VOUT=2.5V,PSAVE
VOUT=3.3V,PSAVE
PWM to PSAVE Hysteresis
90
91
92
93
94
95
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
PSAVE
Entry
IOUT
Decreasing
PWM
Mode
PSAVE
EXIT
IOUT
Increasing
IOUT (A)
I
OUT=500 mA(PWM)/50 mA(PSAVE)



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