Datasheet

LTC3873
4
3873fa
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown Mode I
Q
vs V
IN
Gate Drive Rise and Fall Time
vs C
LOAD
Shutdown I
Q
vs Temperature
RUN Threshold vs Temperature
Shunt Regulation Voltage
vs I
SHUNT
Feedback Voltage vs Temperature Feedback Voltage Line Regulation I
TH
Voltage vs RUN/SS Voltage
TEMPERATURE (°C)
–60
V
FB
VOLTAGE (V)
1.22
1.23
1.24
6040
3873 G01
1.21
1.20
–20–40 200 12010080
1.19
1.18
1.25
V
IN
(V)
1.1990
V
FB
VOLTAGE (V)
1.1995
1.2005
1.2010
1.2015
1.2025
5
7
3873 G02
1.2000
1.2020
9
10
68
RUN/SS VOLTAGE (V)
0
I
TH
VOLTAGE (V)
1.5
2.0
2.5
4.0
3873 G03
1.0
0.5
0
0.5 1.0 1.5
2.0 2.5
3.0 3.5 4.5
5.0
V
IN
= 5V
V
IN
(V)
3
20
SHUTDOWN MODE I
Q
(µA)
25
35
40
45
70
55
5
7
8
3873 G04
30
60
65
50
4
6
9
10
TEMPERATURE (°C)
–60
SHUTDOWN MODE I
Q
(µA)
40
50
60
100
3873 G05
30
20
0
–20
20
60
–40 120
0
40
80
10
80
70
C
LOAD
(pF)
0
TIME (ns)
60
80
100
8000
3873 G06
40
20
50
70
90
30
10
0
2000
4000
6000
10000
RISE TIME
FALL TIME
TEMPERATURE (°C)
–60
RUN THRESHOLDS (V)
0.8
0.9
1.0
20 60 120
3873 G07
0.7
0.6
0.5
–40 –20 0
40
80 100
RISING
FALLING
I
SHUNT
(mA)
0
9.2
REGULATION VOLTAGE (V)
9.3
9.5
9.6
9.7
10.2
9.9
10
20
25 45
3873 G08
9.4
10.0
10.1
9.8
515
30
35
40