LT3690 LINER [Linear Technology], LT3690 Datasheet - Page 5

• Manufacturer Part Number: LT3690
• Description: 42V, 2.5A Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
450
350
300
250
200
100
400
150
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
5.0
3.0
2.5
4.5
4.0
3.5
50
0
0
–55
0
0
No Load Supply Current
Switch Drop
Top FET Current Limit
V
IN REGULATION
OUT
5
–25
0.5
= 3.3V
10
SWITCH CURRENT (A)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
15
5
1
TOP SW
30% DC
70% DC
20
1.5
35
25
BOT SW
30
65
2
35
2.5
95
40
8610 G41
8610 G10
8610 G14
125
45
3
3.6
3.4
3.2
3.0
2.8
2.6
2.4
25
20
15
10
80
75
70
65
60
55
50
45
40
35
30
0
5
–55 –25
–55
–55
Minimum On-Time
No Load Supply Current
Bottom FET Current Limit
V
V
IN REGULATION
OUT
IN
–25
= 12V
–25
= 3.3V
I
I
I
I
LOAD
LOAD
LOAD
LOAD
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
5
= 1A, V
= 1A, V
= 2.5A, V
= 2.5A, V
35
35
35
SYNC
SYNC
SYNC
SYNC
65
65
= 0V
= 3V
= 0V
= 3V
65
95
95
95
125
125
8610 G11
8610 G15
8610 G17
155
155
125
250
200
150
100
100
4.0
6.0
5.5
5.0
4.5
3.5
3.0
2.5
2.0
50
95
90
85
80
75
70
65
60
0
–50
–55 –25
0
Top FET Current Limit vs Duty Cycle
Switch Drop
Minimum Off-Time
SWITCH CURRENT = 1A
V
I
LOAD
IN
–25
= 3.3V
= 0.5A
0.2
TOP SW
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
DUTY CYCLE
0.4
35
35
BOT SW
65
65
0.6
LT8610
95
95
0.8
125
125
8610 G40
8610 G18
8610 G13
5
8610p
155
155
1.0