Datasheet

LTC1871
5
1871fe
TYPICAL PERFORMANCE CHARACTERISTICS
FB Voltage vs Temp FB Voltage Line Regulation FB Pin Current vs Temperature
Shutdown Mode I
Q
vs V
IN
Shutdown Mode I
Q
vs Temperature Burst Mode I
Q
vs V
IN
Burst Mode I
Q
vs Temperature Dynamic I
Q
vs Frequency
Gate Drive Rise and
Fall Time vs C
L
TEMPERATURE (°C)
–50
FB VOLTAGE (V)
1.23
1.24
150
1871 G01
1.22
1.21
0
50
100
–25
25
75
125
1.25
V
IN
(V)
0
1.229
FB VOLTAGE (V)
1.230
1.231
5101520
1871 G02
25 30 35
TEMPERATURE (°C)
–50
0
FB PIN CURRENT (nA)
10
20
30
40
60
–25
250 50 10075
1871 G03
125 150
50
V
IN
(V)
0
0
SHUTDOWN MODE I
Q
(µA)
10
20
10 20
30
40
1871 G04
30
TEMPERATURE (°C)
–50
0
SHUTDOWN MODE I
Q
(µA)
5
10
15
20
–25 0 25 50
1871 G05
75 100 125 150
V
IN
= 5V
V
IN
(V)
0
0
Burst Mode I
Q
(µA)
100
200
300
400
600
10 20
1871 G06
30 40
500
TEMPERATURE (°C)
–50
0
Burst Mode I
Q
(µA)
200
500
0
50
75
1871 G07
100
400
300
–25 25
100
125
150
FREQUENCY (kHz)
0
0
I
Q
(mA)
2
6
8
10
800
18
1871 G08
4
400 1200
600
200 1000
12
14
16
C
L
= 3300pF
I
Q(TOT)
= 550µA + Qg • f
C
L
(pF)
0
0
TIME (ns)
10
20
30
40
60
2000
4000 6000 8000
1871 G09
10000 12000
50
RISE TIME
FALL TIME