LT3653
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Voltage Drop
400
350
SWITCHING FREQUENCY (MHz)
SWITCH VOLTAGE DROP (mV)
300
250
200
150
100
50
0
0
0.2
0.4
0.6
0.8
SWITCH CURRENT (A)
1
1.2
3653 G01
T
A
= 25°C unless otherwise noted
Switching Frequency
125ºC
25ºC
1.7
1.6
INPUT VOLTAGE (V)
1.5
1.4
1.3
1.2
1.1
1.0
–50
8.0
7.5
Undervoltage Lockout
RISING
7.0
6.5
6.0
5.5
5.0
4.5
-25
0
25
50
75
TEMPERATURE (ºC)
100
125
4.0
–50 -25
0
25 50 75 100 125 150
TEMPERATURE (ºC)
3653 G03
–45ºC
FALLING
3653 G02
Output Current Limit
1.2
R
ILIM
= 33.2k
1.15
OUTPUT VOLTAGE (V)
1.1
CURRENT LIMIT (A)
1.05
1
0.95
0.9
0.85
0.8
–50 –25
0
25
50
75
TEMPERATURE (ºC)
100
125
1
0
5
4
3
2
6
Output Current Limit
R
ILIM
= 27.4k
35
V
IN
Overvoltage Lockout
RISING
INPUT VOLTAGE (V)
33
FALLING
31
29
27
25
–50
0
0.2
0.4 0.6 0.8
1
OUTPUT CURRENT (A)
1.2
1.4
–25
0
25
50
75
TEMPERATURE (ºC)
100
125
3653 G04
3653 G05
3653 G06
BOOST Pin Current
35
30
BOOST PIN CURRENT (mA)
BOOST DIODE V
F
(V)
25
20
15
10
5
0
1.4
1.2
1
0.8
0.6
0.4
0.2
0
Boost Diode V
F
0
0.2
0.4
0.5
0.8
SWITCH CURRENT (A)
1
1.2
3653 G07
0
50
100
150
200
DIODE CURRENT (mA)
250
300
3653 G08
3653f
4
LINER [ LINEAR TECHNOLOGY ]
