LT3685 LINER [Linear Technology], LT3685 Datasheet - Page 5

• Manufacturer Part Number: LT3685
• Description: 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
200
150
100
50
0
–50
No Load Supply Current
vs Temperature
V
V
IN
OUT
–25
= 12V
= 3.3V
0
TEMPERATURE (°C)
100
100
25
90
80
70
60
50
40
90
80
70
60
50
40
0
0
Efficiency and Power Loss
Efficiency and Power Loss
50
0.5
0.5
75
1
1
100 125
LOAD CURRENT (A)
LOAD CURRENT (A)
1.5
1.5
3690 G05
2
2
150
2.5
2.5
3
3
V
L = 3.3µH
ƒ = 600kHz
V
L = 4.7µH
ƒ = 600kHz
V
V
V
OUT
V
V
V
OUT
IN
IN
IN
IN
IN
IN
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.5
3.5
= 12V
= 24V
= 34V
= 12V
= 24V
= 34V
= 3.3V
= 5V
3690 G03
3690 G01
5
Maximum Load Current vs V
V
L = 4.7µH
ƒ = 600kHz
OUT
4
3.0
2.5
2.0
1.5
1.0
0.5
0
3.0
2.5
2.0
1.5
1.0
0.5
0
10
= 5V
INPUT VOLTAGE (V)
15
MINIMUM
20
TYPICAL
100
160
140
120
100
25
90
80
70
60
50
40
80
60
40
20
0
0
0
Efficiency and Power Loss
No Load Supply Current vs V
30
0.5
IN
5
T
3690 G06
A
= 25°C, unless otherwise noted.
1
35
10
LOAD CURRENT (A)
INPUT VOLTAGE (V)
1.5
15
2
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
20
2.5
5
Maximum Load Current vs V
V
L = 4.7µH
ƒ = 600kHz
OUT
25
V
V
L = 3.3µH
ƒ = 500kHz
3
10
= 3.3V
OUT
OUT
V
V
V
IN
IN
IN
IN
30
3.5
= 3.3V
= 3.3V
= 12V
= 24V
= 34V
3690 G02
3690 G04
INPUT VOLTAGE (V)
15
35
4
TYPICAL
MINIMUM
3.0
2.5
2.0
1.5
1.0
0.5
0
20
LT3690
25
30
IN
3690 G07
5
3690f
35