Datasheet

LT3570
5
3570fb
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN1
Quiescent Current
vs Temperature
V
IN2
Quiescent Current
vs Temperature
V
IN3
Quiescent Current
vs Temperature
Bias Pin Current vs Temperature SHDN Pin UVLO vs Temperature SHDN Pin Current vs Voltage
SW1 Current Limit vs Duty Cycle
SW1 Saturation Voltage
vs SW1 Current
TEMPERATURE (°C)
–50
CURRENT (mA)
2.0
2.5
3.0
25 50 75 100 125
3570 G04
1.5
1.0
–25 0 150
0.5
0
3.5
TEMPERATURE (°C)
–50
CURRENT (mA)
2.0
3.0
150
3570 G05
1.0
0
0
50
100
–25
25
75
125
4.0
1.5
2.5
0.5
3.5
TEMPERATURE (°C)
–50
CURRENT (µA)
500
600
700
150
3570 G06
400
300
0
0 50 100–25 25 75 125
200
100
900
800
TEMPERATURE (°C)
–50
0
CURRENT (mA)
0.5
1.0
1.5
2.0
050
100
150
3570 G07
2.5
3.0
–25 25
75
125
TEMPERATURE (°C)
–50
0
SHDN PIN VOLTAGE (V)
0.25
0.50
0.75
1.00
050
100
150
3570 G08
1.25
1.50
–25 25
75
125
VOLTAGE (V)
0
CURRENT (µA)
30
40
50
15 25 40
3570 G09
20
10
0
510
20
30 35
DUTY CYCLE (%)
0
CURRENT (A)
1.0
2.0
3.0
0.5
1.5
2.5
20 40 60 80
3570 G10
10010030507090
T
J
= 125°C
T
J
= 25°C
T
J
= –40°C
CURRENT (A)
0
0
VOLTAGE (mV)
50
150
200
250
350
0.1
0.5
0.7
3570 G11
100
300
0.4
0.9
1.0
0.2
0.3
0.6 0.8
T
J
= 125°C
T
J
= 25°C
T
J
= –40°C