lt3570 Linear Technology Corporation, lt3570 Datasheet - Page 5

• Manufacturer Part Number: lt3570
• Description: 1.5a Buck Converter, 1.5a Boost Converter And Ldo Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
3.5
3.0
2.0
1.5
1.0
3.0
2.5
2.0
1.5
0.5
2.5
0.5
1.0
0
0
–50
–50
V
vs Temperature
Bias Pin Current vs Temperature
IN1
–25
–25
Quiescent Current
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
3.0
2.5
2.0
1.5
1.0
0.5
25
25
0
0
SW1 Current Limit vs Duty Cycle
50
50
10
20
75
75
30
100 125
100
DUTY CYCLE (%)
40
125
50
3570 G04
3570 G07
150
150
60
70
T
T
T
80
J
J
J
0.75
= 125°C
= 25°C
= –40°C
1.50
1.25
1.00
0.50
0.25
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
90
0
3570 G10
0
–50
–50
V
vs Temperature
SHDN Pin UVLO vs Temperature
100
IN2
–25
–25
Quiescent Current
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
50
50
75
75
100
100
350
300
250
200
150
100
125
125
50
3570 G05
3570 G08
0
SW1 Saturation Voltage
vs SW1 Current
0
150
150
0.1
0.2 0.3
600
400
900
800
700
500
300
200
100
50
40
20
30
10
0
0
CURRENT (A)
–50
0.4
0
V
vs Temperature
SHDN Pin Current vs Voltage
IN3
0.5
–25
5
Quiescent Current
0.6
10
0
0.7
TEMPERATURE (°C)
T
T
T
25
15
VOLTAGE (V)
0.8
J
J
J
= 125°C
= 25°C
= –40°C
0.9 1.0
20
50
3570 G11
LT3570
75
25
100
30
125
35
3570 G09
3570 G06
3570fa
5
150
40