lt3845ife-trpbf Linear Technology Corporation, lt3845ife-trpbf Datasheet - Page 5

• Manufacturer Part Number: lt3845ife-trpbf
• Description: High Voltage Synchronous Current Mode Step-down Controller With Adjustable Operating Frequency
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
–200
–400
8.05
8.00
7.95
7.90
7.85
800
600
400
200
6.5
6.4
6.3
6.2
6.1
6.0
0
–50
0 0.5
0
V
V
vs Temperature
I
(SENSE
T
CC
CC
A
= 25°C
–25
vs I
5
UVLO Threshold (Rising)
1.0
+
CC(LOAD)
10
+ SENSE
1.5
0
TEMPERATURE (°C)
V
I
15
CC(LOAD)
2.0
SENSE(CM)
25
–
2.5
)
20
vs V
50
(mA)
3.0
(V)
25
SENSE(CM)
3.5
75
30
4.0
T
A
100
= 25°C
35
4.5
3845 G10
3845 G04
3845 G07
125
5.0
40
302
300
298
294
308
306
304
296
292
290
25
20
15
10
9
8
7
6
5
4
3
5
0
–50
Operating Frequency
vs Temperature
4
0
V
I
I
T
CC
T
CC
CC
A
A
= 25°C
= 25°C
2
–25
= 20mA
vs V
5
vs V
4
CC
6
IN
0
TEMPERATURE (°C)
6
(SHDN = 0V)
7
8
25
V
V
IN
CC
10 12 14
8
(V)
(V)
50
9
75
10
16
100
11
3845 G11
3845 G05
18 20
3845 G08
125
12
1.234
1.233
1.232
1.231
1.230
1.229
1.228
1.227
225
200
175
150
125
100
350
345
340
335
330
325
320
75
50
–50
–50
–50
I
Error Amp Transconductance
vs Temperature
Error Amp Reference
vs Temperature
CC
–25
Current Limit vs Temperature
–25
–25
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
50
50
50
LT3845
75
75
75
100
100
100
3845 G12
3845 G06
3845 G09
3845fc
5
125
125
125