Datasheet

LT3757/LT3757A
6
3757afd
Typical perForMance characTerisTics
INTV
CC
Line Regulation
INTV
CC
Dropout Voltage
vs Current, Temperature
Gate Drive Rise
and Fall Time vs INTV
CC
Typical Start-Up Waveforms
INTV
CC
vs Temperature
INTV
CC
Minimum Output Current
vs V
IN
INTV
CC
Load Regulation
T
A
= 25°C, unless otherwise noted.
Gate Drive Rise
and Fall Time vs C
L
FBX Frequency Foldback
Waveforms During Overcurrent
–75 –50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
7.0
INTV
CC
(V)
7.1
7.2
7.3
7.4
3757 G13
V
IN
(V)
0
INTV
CC
VOLTAGE (V)
35
7.25
7.20
10
20
5
15
25 30 40
7.15
7.10
7.30
3757 G16
C
L
(nF)
0
TIME (ns)
60
70
80
50
40
5 1510 20 25 30
10
0
30
90
20
3757 G18
RISE TIME
INTV
CC
= 7.2V
FALL TIME
INTV
CC
(V)
3
TIME (ns)
20
25
15
10
9
6
12 15
5
0
30
3757 G19
C
L
= 3300pF
RISE TIME
FALL TIME
2ms/DIV
V
OUT
5V/DIV
I
L1A
+ I
L1B
5A/DIV
3757 G20
V
IN
= 12V
PAGE 31 CIRCUIT
50µs/DIV
PAGE 31 CIRCUIT
V
OUT
10V/DIV
V
SW
20V/DIV
I
L1A
+ I
L1B
5A/DIV
3757 G21
V
IN
= 12V
INTV
CC
LOAD (mA)
0
6.8
7
7.1
7.2
7.3
20
40 50
60
6.9
10
30
70
3757 G15
INTV
CC
VOLTAGE (V)
V
IN
= 8V
INTV
CC
LOAD (mA)
0
DROPOUT VOLTAGE (mV)
500
600
300
400
200
10
5
15 20
100
0
700
3757 G17
150°C
125°C
25°C
0°C
–55°C
75°C
V
IN
= 6V
V
IN
(V)
0
INTV
CC
CURRENT (mA)
50
60
70
40
3757 G14
40
30
0
10
10 20 305 15 25 35
20
90
80
T
J
= 150°C
INTV
CC
= 6V
INTV
CC
= 4.5V