Datasheet

LT3042
8
3042fb
For more information www.linear.com/LT3042
TYPICAL PERFORMANCE CHARACTERISTICS
ILIM Pin Current PGFB Rising Threshold PGFB Hysteresis
Internal Current Limit Programmable Current Limit Programmable Current Limit
T
J
= 25°C, unless otherwise noted.
Input Pin Current Internal Current Limit Internal Current Limit
ENABLE PIN VOLTAGE (V)
–20
INPUT CURRENT (mA)
–10 –2–14 –6
3042 G25
0
–12 –4–16 –8–18
V
IN
= 2V
0.3
0.1
0.2
0
150°C
125°C
25°C
–55°C
0 10 186 14
20
8 164 122
CURRENT LIMIT (mA)
500
50
450
350
250
150
400
300
200
100
0
3042 G28
R
ILIM
= 0Ω
150°C
125°C
25°C
–55°C
INPUT-TO-OUTPUT DIFFERENTIAL (V)
START OF FOLDBACK
0 100 18060 140
200
80 16040 12020
ILIM PIN CURRENT (µA)
500
50
450
350
250
150
400
300
200
100
0
3042 G31
V
ILIM
= 0V
R
SET
= 33.2kΩ
OUTPUT CURRENT (mA)
V
IN
= 2.5V
V
IN
= 5V
V
IN
= 10V
CURRENT LIMIT (mA)
500
50
450
350
250
150
400
300
200
100
0
3042 G26
R
ILIM
= 0Ω
V
OUT
= 0V
V
IN
= 7.5V
V
IN
= 2.5V
TEMPERATURE (°C)
–75 25 125–25 75
150
0 100–50 50
CURRENT LIMIT (mA)
400
50
350
250
150
300
200
100
0
3042 G29
R
ILIM
= 625Ω
V
OUT
= 0V
V
IN
= 7.5V
V
IN
= 2.5V
TEMPERATURE (°C)
–75 25 125–25 75
150
0 100–50 50
PGFB RISING THRESHOLD (mV)
310
292
308
304
300
296
306
302
298
294
290
3042 G32
V
IN
= 2V
TEMPERATURE (°C)
–75 25 125–25 75
150
0 100–50 50
CURRENT LIMIT (mA)
300
50
250
150
200
100
0
3042 G27
V
IN
= 20V
R
ILIM
= 0Ω
V
OUT
= 0V
TEMPERATURE (°C)
–75 25 125–25 75 1500 100–50 50
CURRENT LIMIT (mA)
100
10
90
80
70
50
30
60
40
20
0
3042 G30
R
ILIM
= 2.49kΩ
V
OUT
= 0V
V
IN
= 7.5V
V
IN
= 2.5V
TEMPERATURE (°C)
–75 25 125–25 75 1500 100–50 50
PGFB HYSTERESIS (mV)
8
7
5
3
1
6
4
2
0
3042 G33
V
IN
= 2V
TEMPERATURE (°C)
–75 25 125–25 75 1500 100–50 50
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