lt1913 Linear Technology Corporation, lt1913 Datasheet - Page 4

• Manufacturer Part Number: lt1913
• Description: 25v, 3.5a, 2.4mhz Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

LT1913
TYPICAL PERFOR A CE CHARACTERISTICS
4
100
5.5
4.5
5.5
5.0
4.5
4.0
3.5
3.0
2.5
6.0
5.0
4.0
3.5
3.0
2.5
2.0
90
80
70
60
50
6.5
–50
5
0
Effi ciency
Maximum Load Current
Switch Current Limit
V
L = 4.7μH
f = 600kHz
V
T
L = 4.7μH
f = 600kHz
A
OUT
OUT
–25
= 25°C
0.5
= 5V
= 3.3V
10
0
OUTPUT CURRENT (A)
TYPICAL
1
DUTY CYCLE = 90 %
DUTY CYCLE = 10 %
INPUT VOLTAGE (V)
TEMPERATURE (°C)
V
25
IN
MINIMUM
1.5
= 24V
V
50
15
IN
= 12V
2
75
2.5
100
W
20
125
3
1913 G01
1913 G06
1913 G09
U
150
3.5
25
100
90
80
70
60
50
700
400
300
200
600
500
100
5.5
5.0
4.5
4.0
3.5
3.0
Effi ciency
0
0
V
L = 3.3μH
f = 600kHz
5
Switch Voltage Drop
0
OUT
Maximum Load Current
V
T
L = 4.7μH
f = 600kHz
0.5
A
OUT
= 3.3V
= 25°C
= 5V
1
OUTPUT CURRENT (A)
1
10
V
V
SWITCH CURRENT (A)
IN
IN
INPUT VOLTAGE (V)
= 24V
1.5
= 12V
2
15
2
TYPICAL
MINIMUM
3
2.5
20
3
4
1913 G02
1913 G07
1913 G10
T
3.5
A
= 25°C unless otherwise noted.
25
5
100
90
80
70
60
50
Effi ciency
0
V
V
L = 4.7μH
f = 600kHz
120
105
IN
OUT
6.0
5.5
5.0
4.5
4.0
3.5
3.0
90
75
60
45
30
15
0
= 12V
0.5
0
0
Switch Current Limit
Boost Pin Current
= 5V
OUTPUT CURRENT (A)
1
20
1
SWITCH CURRENT (A)
1.5
DUTY CYCLE (%)
40
2
2
2.5
60
3
3
1913 G03
80
4
3.5
1913 G11
2.0
0.5
1913 G08
3.0
2.5
1.5
1.0
1913f
100
5