Datasheet

LTC3900
4
3900fb
Typical perForMance characTerisTics
Current Sense Threshold vs
Temperature
V
CS(MAX)
Clamp Voltage vs CS
+
Input Current
SYNC Positive Threshold vs
Temperature
SYNC Negative Threshold vs
Temperature Propagation Delay vs V
CC
Propagation Delay vs
Temperature
Timeout vs V
CC
Timeout vs Temperature Timeout vs R
TMR
TIMEOUT (µs)
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
V
CC
(V)
4
TIMEOUT (µs)
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
6
8
9
3900 G01
5
7
10
11
TEMPERATURE (°C)
–50–75 0
50
75
3900 G02
–25
25
100
150125
R
TMR
(kΩ)
10
9
8
7
6
5
4
3
2
1
0
TIMEOUT (µs)
3900 G03
0 10 20 30 40 50 60 70 80 90 100
T
A
= 25°C
R
TMR
= 51k
C
TMR
= 470pF
T
A
= 25°C
V
CC
= 5V
C
TMR
= 470pF
V
CC
= 5V
R
TMR
= 51k
C
TMR
= 470pF
CURRENT SENSE THRESHOLD (mV)
17
15
13
11
9
7
5
3
3900 G04
V
CC
= 5V, 11V
CS
+
INPUT CURRENT (mA)
0 5
V
CS(MAX)
CLAMP VOLTAGE (V)
10 2015
25
30
3900 G05
18
17
16
15
14
13
12
11
10
TEMPERATURE (°C)
–75 –50
SYNC POSITIVE THRESHOLD (V)
100
3900 G06
0 50
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
–25 25 75 150125
TEMPERATURE (°C)
–50–75 100
0 50–25 25 75 150125
T
A
= 25°C
V
CC
= 5V
V
CC
= 11V
TEMPERATURE (°C)
SYNC NEGATIVE THRESHOLD (V)
3900 G07
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
–1.8
V
CC
(V)
4
PROPAGATION DELAY (ns)
10
3900 G08
6 8
120
110
100
90
80
70
60
50
40
5 7 9 11
TEMPERATURE (°C)
3900 G09
–75 –50 100
0 50–25 25 75 150125
T
A
= 25°C
C
LOAD
= 4.7nF
V
CC
= 5V
C
LOAD
= 4.7nF
V
CC
= 5V, 11V
SYNC TO FG
SYNC TO CG
SYNC TO FG
SYNC TO CG
PROPAGATION DELAY (µs)
120
110
100
90
80
70
60
50
40
–75 –50 100
0 50–25 25 75 150125