lt1941 Linear Technology Corporation, lt1941 Datasheet - Page 5

• Manufacturer Part Number: lt1941
• Description: Triple Monolithic Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
500
400
300
200
100
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
50
40
30
20
10
0
0
0
0
0
SW1 Current Limit vs Duty Cycle
0
SW1 V
BOOST1 Pin Current
T
T
A
A
= 25°C
= 25°C
0.5
0.5
20
CESAT
SW1 PIN CURRENT (A)
SWITCH CURRENT (A)
TYPICAL
MINIMUM
1
1
DUTY CYCLE (%)
40
1.5
1.5
60
2
2
W
80
2.5
2.5
1941 G02
1941 G04
1941 G03
U
100
3
3
1.235
1.280
1.265
1.250
1.220
600
500
400
300
200
100
3.0
2.5
2.0
1.5
1.0
0.5
0
0
–50
SW2 V
0
SW2 Current Limit vs Duty Cycle
0
V
T
FB3
A
= 25°C
–25
vs Temperature
20
CESAT
0.5
SWITCH CURRENT (A)
0
TEMPERATURE (°C)
DUTY CYCLE (%)
40
25
1
50
MINIMUM
TYPICAL
60
75
1.5
80
100
1941 G09
1941 G06
1941 G05
100
125
2
0.615
0.645
0.635
0.625
0.605
500
400
300
200
100
10
40
30
20
0
0
–50
0
0
V
BOOST2 Pin Current
SW3 V
T
T
FB1
A
A
= 25°C
= 25°C
–25
0.25
, V
CESAT
FB2
0.5
SWITCH CURRENT (A)
SW2 PIN CURRENT (A)
0
TEMPERATURE (°C)
0.5
vs Temperature
25
0.75
1
50
LT1941
1
75
1.5
1.25
100
1941 G10
1941 G11
1941 G12
1941fa
5
1.5
125
2