LT3570
TYPICAL PERFORMANCE CHARACTERISTICS
SW2 Current Limit vs Duty Cycle
3.0
2.5
2.0
1.5
1.0
0.5
0
0
T
J
= 125°C
T
J
= 25°C
T
J
= –40°C
10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
3570 G12
SW2 Saturation Voltage
vs SW2 Current
350
300
250
VOLTAGE (mV)
200
150
100
50
0
T
J
= 125°C
T
J
= 25°C
T
J
= –40°C
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
CURRENT (A)
3570 G13
CURRENT (A)
BOOST Pin Current
vs Switch Current
30
25
T
J
= 25°C
CURRENT (mA)
CURRENT (mA)
20
15
10
5
2
0
0
0.2
0.4
0.6
CURRENT (A)
0.8
1.0
3570 G14
NPN_DRV Output Current vs V
IN3
18
16
14
12
10
8
6
4
T
J
= 25°C
T
J
= 125°C
T
J
= –40°C
T
J
= –40°C
T
J
= 125°C
0
1
5
10
15 20 25
VOLTAGE (V)
30
35
40
3570 G15
3570fa
6