Datasheet

LT3845A
6
3845afa
Maximum Current Sense
Threshold vs Temperature
TEMPERATURE (°C)
–50
CURRENT SENSE THRESHOLD (mV)
102
104
106
25 75
3845A G13
100
98
–25 0
50 100 125
96
94
V
IN
UVLO Threshold (Rising)
vs Temperature
TEMPERATURE (°C)
–50 25 75
–25 0
50 100 125
3845A G14
4.54
4.52
4.50
4.48
4.46
4.44
4.42
4.40
V
IN
UVLO THRESHOLD, RISING (V)
V
IN
UVLO Threshold (Falling)
vs Temperature
TEMPERATURE (°C)
–50 25 75
–25 0
50 100 125
3845A G15
V
IN
UVLO THRESHOLD, FALLING (V)
3.86
3.84
3.82
3.80
3.78
3.76
TYPICAL PERFORMANCE CHARACTERISTICS
I
(SENSE
+
+ SENSE
–
)
vs V
SENSE(CM)
Operating Frequency
vs Temperature
V
SENSE(CM)
(V)
0 0.5 1.5 2.5 3.5 4.5
I
(SENSE
+
+ SENSE
–
)
(µA)
800
600
400
200
0
–200
–400
1.0 2.0 3.0 4.0
3845A G10
5.0
T
A
= 25°C
TEMPERATURE (°C)
–50
290
OPERATING FREQUENCY (kHz)
292
296
298
300
50
308
3845A G11
294
0
–25
75 100
25 125
302
304
306
TEMPERATURE (°C)
–50 25 75
3845A G12
–25 0
50 100 125
1.234
1.233
1.232
1.231
1.230
1.229
1.228
1.227
ERROR AMP REFERENCE (V)
Error Amp Reference
vs Temperature
DUTY CYCLE (%)
0 40 60 70 80
10 20 30
50 90 100
3845A G16
CURRENT SENSE THRESHOLD (mV)
0
10
20
30
40
50
60
70
80
90
100
Current Sense Threshold
vs Duty Cycle