Datasheet

5
LT1680
Error Amplifier Source Current
vs Temperature
SS Output Current
vs Temperature
Average Current Limit Threshold
Sense Voltage vs Common Mode
Voltage
TEMPERATURE (°C)
–50
ERROR AMPLIFIER SOURCE CURRENT (µA)
350
325
300
275
250
225
200
25 75
1680 G10
–25 0
50 100 125
TEMPERATURE (°C)
–50
SS OUTPUT CURRENT (µA)
9
8
7
6
25 75
1680 G11
–25 0
50 100 125
RUN/SHDN Rising Threshold
vs Temperature
TEMPERATURE (°C)
–50
RUN/SHDN RISING THRESHOLD (V)
1.26
1.25
1.24
1.23
1.22
1.21
1.20
25 75
1680 G12
–25 0
50 100 125
RUN/SHDN Threshold Hysteresis
vs Temperature
TEMPERATURE (°C)
–50
RUN/SHDN THRESHOLD HYSTERESIS (mV)
26
25
24
23
22
21
20
25 75
1680 G13
–25 0
50 100 125
V
SENSE(CM)
(V)
0
V
SENSE
(mV)
45 60
1680 G14
1
2
3
160
150
140
130
120
110
100
90
80
UPPER LIMIT
FULL OPERATING
TEMPERATURE RANGE
TYPICAL
LOWER LIMIT
UVLO Thresholds vs Temperature
TEMPERATURE (°C)
–50
V
12VIN
(V)
100
1680 G15
050
10.00
9.75
9.50
9.25
9.00
8.75
8.50
8.25
8.00
–25 25 75 125
RISING
FALLING
Sense Amplifier Input Bias
Current (Source) vs Temperature
RUN/SHDN Input Current
vs Pin Voltage
TEMPERATURE (°C)
–50
I
B(SOURCE)
(µA)
100
1680 G16
050
1200
1100
1000
900
800
700
600
500
400
–25 25 75 125
V
CMSENSE
= 0V
Sense Amplifier Input Bias
Current (Sink) vs Temperature
TEMPERATURE (°C)
–50
I
B(SINK)
(µA)
60
55
50
45
40
35
30
25 75
1680 G17
–25 0
50 100 125
V
CMSENSE
= 10V
RUN/SHDN PIN VOLTAGE (V)
0
RUN/SHDN INPUT CURRENT (nA )
2.0
1680 G18
0.5
1.0
1.5(1.25)
800
700
600
500
400
300
200
100
0
..................................................................
TYPICAL
UPPER
LIMIT
FULL OPERATING
TEMPERATURE
RANGE
LOWER
LIMIT
TYPICAL PERFOR A CE CHARACTERISTICS
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