LTC3721-2 LINER [Linear Technology], LTC3721-2 Datasheet - Page 5

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

Typical perForMance characTerisTics
120
110
100
90
80
70
60
50
40
1
Propagation Delay vs C
T
V
SYNC TO FG
A
CC
= 25°C
2
= 5V
3
4
C
50
45
40
35
30
25
20
15
10
20
18
16
14
12
10
8
6
4
5
0
LOAD
–75 –50
5
Rise/Fall Time vs Load
Capacitance
0
V
Temperature
T
V
C
CC
A
CC
(nF)
6
LOAD
1
= 25°C
Supply Current vs
= 5V
7
–25
SYNC TO CG
2
= 4.7nF
LOAD
3
TEMPERATURE (°C)
RISE TIME
8
0
4
C
9
3900 G10
LOAD
V
25
CC
V
5
10
CC
= 5V
(nF)
50
= 11V
6
75
FALL TIME
7
100
8
50
45
40
35
30
25
20
15
10
5
0
125
Rise/Fall Time vs V
4
9
3900 G13
3900 G15
T
C
A
150
LOAD
10
= 25°C
5
FALL TIME
= 4.7nF
6
7
V
CC
(V)
CC
RISE TIME
8
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
30
25
20
15
10
5
0
–75 –50
Undervoltage Lockout Threshold
Voltage vs Temperature
V
Capacitance
0
CC
9
T
f
SYNC
A
1
Supply Current vs Load
= 25°C
10
–25
= 100kHz
RISING EDGE
2
3900 G11
FALLING EDGE
TEMPERATURE (°C)
3
11
0
4
C
25
LOAD
5
50
V
(nF)
CC
6
50
45
40
35
30
25
20
15
10
= 11V
5
0
75
Rise/Fall Time vs Temperature
–75 –50
7
V
C
100
V
CC
LOAD
CC
8
= 5V
125 150
= 5V
–25
= 4.7nF
3900 G14
3900 G16
9
RISE TIME
TEMPERATURE (°C)
10
0
25
LTC3900
FALL TIME
50
75
100
125
3900fb
3900 G12
5
150