sc2441a Semtech Corporation, sc2441a Datasheet - Page 16

• 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
POWER MANAGEMENT
2006 Semtech Corp.
-10
-20
225
180
135
20
10
90
45
0
0
-50
-50
R
2
= 140K W
-25
Phase Shift vs Temperature
-25
R
f
Phase Shift vs Temperature
R
f
SYNC
Pe rce ntage De viation In
SYNC
OSC
OSC
R
2
= 68.1K W
= 51.1K W
0
= 400KHz
= 40.2K W
= 500KHz
0
Temperature (°C)
Temperature (°C)
25
100
25
Upper Gate Driver Transition Time vs Load
80
60
40
20
0
0
50
50
R
V
2
CC
= 34.8K W
75
R
R
R
R
75
R
2
= 12V
2
2
2
2
= 46.4K W
= 36.5K W
= 47.5K W
= 71.5K W
= 143K W
Load Capacitance (nF)
100
Capacitance
100
125
125
1
t
t
f
r
25°C
10
-10
-15
-20
-25
225
180
135
25
20
15
10
90
45
-5
5
0
0
-50
-50
R
2
= 71.5K W
-25
-25
Phase Shift vs Temperature
R
R
f
R
f
Phase Shift vs Temperature
SYNC
SYNC
Pe rce ntage De viation In
2
OSC
OSC
= 47.5K W
R
2
= 66.5K W
= 300KHz
= 36.5K W
= 40.2K W
= 500KHz
0
0
Temperature (°C)
Temperature (°C)
25
25
16
50
50
R
R
75
R
R
75
2
R
2
2
2
= 143K W
2
100
= 31.6K W
= 41.2K W
= 61.9K W
= 121K W
Upper Gate Driver Transition Time vs Load
80
60
40
20
0
100
100
0
125
125
V
CC
= 5V
Load Capacitance (nF)
Capacitance
1
-10
-20
-30
-40
-50
-60
225
180
135
30
20
10
90
45
0
0
-50
-50
25°C
t
f
R
R
f
SYNC
2
OSC
-25
= 41.2K W
-25
Phase Shift vs Temperature
t
R
f
Phase Shift vs Temperature
SYNC
r
= 51.1K W
Percentage Deviation In
OSC
= 400KHz
10
= 66.5K W
= 300KHz
0
0
Temperature (°C)
Temperature (°C)
R
2
25
25
= 61.9K W
SC2441A
50
50
R
2
www.semtech.com
= 121K W
R
R
R
R
75
75
2
2
2
2
R
= 34.8K W
= 46.4K W
= 68.1K W
= 140K W
2
= 31.6K W
100
100
125
125