LTC3721-2 LINER [Linear Technology], LTC3721-2 Datasheet - Page 4

• Manufacturer Part Number: LTC3721-2
• Description: Synchronous Rectifier Driver for Forward Converters
• Manufacturer: LINER [Linear Technology]

LTC3900
Typical perForMance characTerisTics
4
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
–1.8
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
17
15
13
11
9
7
5
3
–75
–75 –50
Timeout vs V
Current Sense Threshold vs
Temperature
SYNC Negative Threshold vs
Temperature
4
V
T
R
C
V
A
CC
TMR
TMR
CC
–50
= 25°C
= 5V, 11V
= 5V, 11V
5
= 470pF
= 51k
–25
–25
6
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
CC
25
25
7
V
CC
(V)
50
50
8
75
75
9
100
100
10
125
125
3900 G04
3900 G07
3900 G01
150
150
11
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
120
110
100
18
17
16
15
14
13
12
11
10
90
80
70
60
50
40
–75
0
4
Timeout vs Temperature
V
Input Current
Propagation Delay vs V
T
V
R
C
CS(MAX)
T
C
A
CC
TMR
A
TMR
LOAD
–50
= 25°C
= 25°C
= 5V
5
5
= 51k
= 470pF
= 4.7nF
–25
CS
SYNC TO CG
Clamp Voltage vs CS
+
6
TEMPERATURE (°C)
INPUT CURRENT (mA)
10
0
25
7
V
CC
15
(V)
50
8
SYNC TO FG
75
20
CC
9
100
25
10
125
+
3900 G05
3900 G02
3900 G08
150
30
11
120
110
100
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
90
80
70
60
50
40
10
9
8
7
6
5
4
3
2
1
0
–75 –50
–75 –50
Timeout vs R
0
SYNC Positive Threshold vs
Temperature
Propagation Delay vs
Temperature
T
V
C
V
C
A
CC
TMR
CC
LOAD
10 20 30 40 50 60 70 80 90 100
= 25°C
= 5V
= 5V
= 470pF
–25
–25
= 4.7nF
SYNC TO FG
V
TEMPERATURE (°C)
TEMPERATURE (°C)
CC
0
0
= 5V
TMR
R
V
25
TMR
CC
25
= 11V
(k )
50
50
SYNC TO CG
75
75
100
100
125
125
3900 G06
3900fb
3900 G03
3900 G09
150
150