LT3840
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted.
EN Threshold Voltage vs
Temperature
UVLO Threshold Voltage vs
Temperature
OVLO Threshold vs Temperature
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
95
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
95
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
OVLO RISING
UVLO RISING
UVLO FALLING
EN RISING
OVLO FALLING
EN FALLING
90
90
–50 –25
0
25 50 75 100 125 150
–50 –25
0
25 50 75 100 125 150
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3840 G01
3840 G02
3840 G03
INTVCC Regulation Voltage vs
Temperature
+
–
Shutdown Current vs Temperature
ISENSE + ISENSE vs VSENSE(CM)
20
18
16
14
12
10
8
1600
1200
800
400
0
7.7
7.6
7.5
7.4
7.3
7.2
7.1
7.0
6
V
IN
4
–400
–800
AUXV
IN
2
0
–50 –25
0
25 50 75 100 125 150
0
1
2
3
4
5
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
COMMON MODE SENSE VOLTAGE (V)
TEMPERATURE (°C)
3840 G04
3840 G06
3840 G05
Switching Frequency vs
Temperature
Soft-Start (TK/SS) Current vs
Temperature
Regulated FB Voltage vs
Temperature
330
320
310
300
290
280
270
12
11
10
9
1.28
1.27
1.26
1.25
1.24
1.23
1.22
R
= 49.9k
T
8
7
6
–50 –25
0
25 50 75 100 125 150
–50 –25
0
25 50 75 100 125 150
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3840 G07
3840 G08
3840 G09
3840fa
For more information www.linear.com/LT3840
5
Linear [ Linear ]
