LT3757 LINER [Linear Technology], LT3757 Datasheet - Page 5

• Manufacturer Part Number: LT3757
• Description: Boost, Flyback, SEPIC and Inverting Controller
• Manufacturer: LINER [Linear Technology]

Typical perForMance characTerisTics
1.28
1.26
1.24
1.22
1.20
1.18
330
320
280
270
310
300
290
35
30
25
20
15
10
5
0
–75 –50
–75 –50
0
Dynamic Quiescent Current
vs Switching Frequency
Switching Frequency
vs Temperature
SHDN/UVLO Threshold
vs Temperature
R
C
100 200
T
L
= 41.2K
= 3300pF
SWITCHING FREQUENCY (KHz)
–25
–25
300
SHDN/UVLO RISING
TEMPERATURE (°C)
SHDN/UVLO FALLING
TEMPERATURE (°C)
0
0
400
25
25
500 600 700
50
50
75
75
100
100
800
125
125
900
3757 G04
3757 G10
3757 G07
1000
150
150
1000
100
120
115
110
105
100
40
30
20
10
10
0
–75 –50
0
0
R
SENSE Current Limit Threshold
vs Temperature
SHDN/UVLO Current vs Voltage
T
100 200
vs Switching Frequency
SWITCHING FREQUENCY (KHz)
–25
SHDN/UVLO VOLTAGE (V)
10
300
TEMPERATURE (°C)
0
400
25
500 600 700
20
50
75
30
100
800
125
3757 G11
T
900
3757 G05
3757 G08
A
= 25°C, unless otherwise noted.
1000
150
40
115
110
105
100
120
100
95
2.4
2.2
2.0
1.8
1.6
20
80
60
40
0
–0.8
–75 –50
0
Normalized Switching Frequency
vs FBX
SENSE Current Limit Threshold
vs Duty Cycle
SHDN/UVLO Hysteresis Current
vs Temperature
–0.4
20
–25
TEMPERATURE (°C)
DUTY CYCLE (%)
FBX VOLTAGE (V)
0
0
40
25
0.4
50
60
LT3757
0.8
75
100
80
1.2
125
3757 G09
3757 G12
3757 G06
3757fb

100
150
1.6