lt3653 Linear Technology Corporation, lt3653 Datasheet - Page 4

• Manufacturer Part Number: lt3653
• Description: 1.2a, Hv Input Regulator With Output Current Limit For Battery Charger Applications
• Manufacturer: Linear Technology Corporation

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