LTC1871 Linear Technology, LTC1871 Datasheet - Page 4

• Manufacturer Part Number: LTC1871
• Description: Wide Input Range/ No RSENSE Current Mode Boost/ Flyback and SEPIC Controller
• Manufacturer: Linear Technology

LTC1871
TYPICAL PERFOR A CE CHARACTERISTICS
4
300
1.25
1.24
1.23
1.22
1.21
500
400
200
100
30
20
10
0
0
–50
–50
0
FB Voltage vs Temp
Shutdown Mode I
Burst Mode I
–25
–25
10
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
Q
V
vs Temperature
IN
50
20
50
(V)
Q
vs V
75
75
IN
100 125 150
100
30
W
125
1871 G01
1871 G07
1871 G04
U
150
40
1.231
1.230
1.229
18
16
14
12
10
15
20
10
8
4
5
6
0
0
2
–50
0
0
Shutdown Mode I
FB Voltage Line Regulation
Dynamic I
V
C
I
Q(TOT)
IN
L
–25
= 3300pF
= 5V
5
200
= 550 A + Qg • f
0
10
TEMPERATURE ( C)
400
Q
FREQUENCY (kHz)
25
vs Frequency
15
V
IN
600
50
(V)
Q
20
vs Temperature
75
800
25
100 125 150
1000
30
1871 G08
1871 G02
1871 G05
1200
35
600
500
400
300
200
100
60
50
10
40
30
20
60
50
40
30
20
10
0
0
0
–50
FB Pin Current vs Temperature
Burst Mode I
0
0
Gate Drive Rise and Fall Time
vs C
–25
2000
L
10
0
TEMPERATURE ( C)
4000
25
Q
vs V
V
C
6000
IN
L
20
50
(pF)
(V)
IN
RISE TIME
FALL TIME
75
8000
100
30
10000 12000
125 150
1871 G03
1871 G06
1871 G09
40