LT3755-1 LINER [Linear Technology], LT3755-1 Datasheet - Page 7

• Manufacturer Part Number: LT3755-1
• Description: 60V 4-Switch Synchronous
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
1.200
1.175
1.150
1.125
1.100
1.075
1.050
1.025
1.000
800
700
600
500
400
300
200
100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
–50
–50
0
Supply Current vs Input Voltage
Oscillator Frequency
vs Temperature
OPENLED Threshold
vs Temperature
–25
–25
10
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
20
25
25
R
R
R
FALLING
T
T
RISING
V
T
IN
= 29.1k
= 59.0k
= 147k
30
50
50
(V)
75
75
40
100
100
T
T
T
A
A
A
= 150°C
= 25°C
= –50°C
50
125
125
3791 G22
3791 G25
3791 G19
150
150
60
100
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
90
80
70
60
50
40
30
20
8
7
6
5
4
3
2
1
0
–50
–50
–50
OVLO Threshold vs Temperature
EN/UVLO Pin Current
TG1, TG2 Minimum On-Time
vs Temperature
V
EN/ULO
–25
–25
–25
= 1V
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
FALLING
RISING
TG2
TG1
50
50
50
75
75
75
100
100
100
125
125
125
T
3791 G20
3791 G23
3791 G26
A
= 25°C, unless otherwise noted.
150
150
150
1.22
1.10
1.30
1.28
1.26
1.24
1.20
1.18
1.16
1.14
1.12
350
300
200
250
150
100
16
14
12
10
50
0
8
6
4
2
0
–50
–50
–50
Soft-Start Current vs Temperature
EN/UVLO Threshold Voltage
TG1, TG2 Minimum Off-Time
vs Temperature
–25
–25
–25
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (˚C)
DISCHARGING
25
f
f
f
25
25
SW
SW
SW
CHARGING
FALLING
RISING
= 200kHz
= 400kHz
= 700kHz
50
50
50
LT3791
75
75
75
100
100 125
100 125 150
125
3791 G27
3791 G21
3791 G24
7
3791f
150
150