lt3693 Linear Technology Corporation, lt3693 Datasheet - Page 4

• Manufacturer Part Number: lt3693
• Description: 36v, 3.5a, 2.4mhz Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

LT3693
TYPICAL PERFOR A CE CHARACTERISTICS
4
100
5.5
5.0
4.5
4.0
3.5
3.0
2.5
5.5
4.5
6.0
5.0
4.0
3.5
3.0
2.5
2.0
80
6.5
90
70
60
50
–50
5
Effi ciency
0
Maximum Load Current
Switch Current Limit
V
T
L = 4.7μH
f = 600kHz
V
L = 4.7μH
f = 600kHz
OUT
A
OUT
–25
= 25°C
0.5
= 3.3V
= 5V
10
0
MINIMUM
OUTPUT CURRENT (A)
TYPICAL
DUTY CYCLE = 90 %
1
DUTY CYCLE = 10 %
INPUT VOLTAGE (V)
TEMPERATURE (°C)
V
25
15
IN
1.5
= 24V
V
50
IN
= 12V
2
20
75
V
IN
2.5
= 34V
100
W
25
125
3
3693 G01
3693 G06
3693 G09
U
150
3.5
30
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
OUT
A
= 3.3V
= 25°C
= 5V
10
1
OUTPUT CURRENT (A)
1
V
V
SWITCH CURRENT (A)
IN
IN
INPUT VOLTAGE (V)
= 24V
1.5
= 12V
15
2
V
IN
= 34V
2
TYPICAL
MINIMUM
20
3
2.5
25
3
4
3693 G02
3693 G07
3693 G10
T
3.5
A
= 25°C unless otherwise noted.
30
5
100
80
50
90
70
60
Effi ciency
0
V
V
L = 4.7μH
f = 600kHz
120
105
6.0
5.5
5.0
4.5
4.0
3.5
3.0
IN
OUT
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
1.5
SWITCH CURRENT (A)
DUTY CYCLE (%)
40
2
2
2.5
60
3
3
3693 G03
80
4
3.5
3693 G08
3693 G11
3.0
2.5
2.0
1.5
1.0
0.5
3693f
100
5