lt3663 Linear Technology Corporation, lt3663 Datasheet - Page 4

• Manufacturer Part Number: lt3663
• Description: 1.2a, 1.5mhz Step-down Switching Regulator With Output Current Limit
• Manufacturer: Linear Technology Corporation

LT3663
TYPICAL PERFORMANCE CHARACTERISTICS
4
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
400
350
300
250
200
150
100
45
40
35
30
25
20
15
10
50
5
0
0
–50
0
RUN Pin Current
0
Switching Frequency
Switch Voltage Drop
–25
10
0.2
RUN PIN VOLTAGE (V)
0
SWITCH CURRENT (A)
TEMPERATURE (°C)
20
0.4
25
30
0.6
50
40
0.8
75
50
100
1
125°C
–45°C
25°C
3663 G02
3663 G11
3663 G01
125
60
1.2
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
140
120
100
1.4
1.2
0.8
0.6
0.4
0.2
80
60
40
20
0
1
0
–50
–50
0
Output Current Limit
Minimum Switch On-Time
Boost Diode V
R
ILIM
–25
–25
50
= 36.5k
DIODE CURRENT (mA)
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
100
25
25
f
150
50
50
200
75
75
250
100
100
3663 G04
3663 G10
3653 G09
T
A
125
125
300
= 25°C, unless otherwise noted.
0.84
0.82
0.80
0.78
0.76
35
30
25
20
15
10
5
0
6
5
4
3
2
1
0
–50
0
0
Feedback Voltage
BOOST Pin Current
Output Current Limit
R
ILIM
–25
0.2
0.2
= 28.7k
0.4
SWITCH CURRENT (A)
OUTPUT CURRENT (A)
0
TEMPERATURE (°C)
0.4
0.6
25
0.5
0.8
50
0.8
75
1
1.0
100
1.2
3663 G05
3653 G07
3663 G12
3663fa
125
1.2
1.4