LTC3642
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
Line Regulation
Load Regulation
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
100
95
90
85
80
75
70
65
60
0.30
0.20
0.10
0
I
= 25mA
FIGURE 10 CIRCUIT
V
= 10V
LOAD
IN
FIGURE 10 CIRCUIT
I
OPEN
= 5V
FIGURE 10 CIRCUIT
OPEN
SET
OUT
V
= 10V
IN
V
I
SET
V
IN
= 15V
V
= 45V
IN
V
= 24V
IN
–0.10
–0.20
–0.30
V
= 36V
IN
30 35
VOLTAGE (V)
5
10 15 20 25
40 45
0
10
20
30
40
50
0.1
1
10
100
V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
IN
3642 G01
3642 G02
3642 G03
Feedback Comparator Voltage vs
Temperature
Feedback Comparator Hysteresis
vs Temperature
Peak Current Trip Theshold vs
Temperature
0.801
0.800
0.799
0.798
130
120
110
100
90
80
70
60
50
40
30
20
10
5.6
5.4
5.2
5.0
4.8
4.6
4.4
V
= 10V
V
= 10V
IN
IN
V
= 10V
IN
I
OPEN
SET
R
I
= 500k
= GND
ISET
SET
0
–40
–10
20
50
80
110
–40
–10
20
50
80
110
–40
20
50
80
110
–10
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3642 G04
3642 G06
3642 G05
Quiescent Supply Current vs
Temperature
Peak Current Trip Threshold
vs RISET
Quiescent Supply Current vs
Input Voltage
120
110
100
90
14
12
10
8
14
12
10
8
V
= 10V
V
= 10V
IN
IN
SLEEP
SLEEP
80
70
60
6
6
50
SHUTDOWN
4
4
40
SHUTDOWN
30
2
2
20
0
–40
0
10
–10
20
50
80
0
200
400
600
(kΩ)
800 1000 1200
110
15
25
35
5
45
R
TEMPERATURE (°C)
V
VOLTAGE (V)
SET
IN
3642 G07
3642 G09
3642 G08
3642f
4
Linear [ Linear ]
