sc2441a Semtech Corporation, sc2441a Datasheet - Page 14

• Manufacturer Part Number: sc2441a
• Description: Sc2441a 1.8v To 20v Input 2-phase Synchronous Step-down Controllers With Step-up Converter
• Manufacturer: Semtech Corporation

Typical Characteristics
 2006 Semtech Corp.
POWER MANAGEMENT
Soft-Start Discharge Current vs Temperature
9.0
8.5
8.0
7.5
7.0
1.30
1.28
1.26
1.24
1.22
1.20
Current Sense Amplifier Input Bias Current vs
Soft-Start Threshold Voltage (to Eable PWM
-25
-30
-35
-40
-50
-50
-50
V
F B1
-25
Operation) vs Temperature
-25
Temperature (Inverting Pin)
-25
=V
FB2
V
0
=0.3V, V
CC
Temperature (°C)
0
0
Temperature (°C)
Temperature (°C)
= 8V, V
25
25
25
SS1
V
=V
FB1
CS1 (-)
50
50
50
=V
SS2
FB2
= V
=3V
75
75
75
=0.03V
CS2 (-)
100 125
100 125
100 125
= 0V
Soft-Start Voltage (to Restart Overload Shutdown)
V
1.75
1.74
1.73
1.72
1.71
1.70
IN
Overload Hiccup Threshold vs Temperature
0.400
0.395
0.390
0.385
0.380
0.375
0.370
0.365
0.360
0.355
0.350
0.60
0.58
0.56
0.54
0.52
0.50
Start-up Threshold Voltage vs Temperature
-50
-50
-50
-25
-25
-25
V
SS1,2
0
vs Temperature
Temperature (°C)
0
0
Temperature (°C)
Temperature (°C)
= 3.5V
25
25
25
14
50
50
50
75
75
75
100 125
100 125
100 125
Soft-Start Voltage Threshold (to Enable Overload
0.83
0.81
0.79
0.77
0.75
0.110
0.105
0.100
0.095
0.090
0.085
0.080
0.075
4.0
3.8
3.6
3.4
3.2
3.0
Soft-Start Disable Voltage vs Temperature
-50
V
-50
IN
Hiccup Protection) vs Temperature
-50
Hysteresis Voltage vs Temperature
V
FB1
-25
-25
-25
=V
F B2
0
0
=0.45V, V
Temperature (°C)
Temperature (°C)
0
Temperature (°C)
25
25
25
COMP1
SC2441A
50
50
50
www.semtech.com
=V
75
COMP2
75
75
=2V
100 125
100 125
100 125