LT3579 LINER [Linear Technology], LT3579 Datasheet - Page 5

• Manufacturer Part Number: LT3579
• Description: 6A Boost/Inverting DC/DC Converter with Fault Protection
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
10
10
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
–50
–50
20
Switch Current Limit
vs Temperature
Oscillator Frequency
Switch Current Limit
–25
–25
30
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
40
DUTY CYCLE (%)
R
25
25
R
T
T
= 432k
= 34k
50
50
50
75
75
60
100 125 150
100 125 150
70
35791 G01
35791 G04
35791 G07
80
350
300
250
200
150
100
1/2
1/3
1/4
1/5
1/6
50
10
0
9
8
7
6
5
4
3
2
1
0
1
0
Switch Saturation Voltage
0
Commanded Switch Current vs SS
0
Oscillator Frequency During
Soft-Start
0
CONFIGURATIONS
INVERTING
1
0.2
0.2
V
SW1
SW1 + SW2 CURRENT (A)
2
= V
0.4
0.4
SS VOLTAGE (V)
FB VOLTAGE (V)
SW2
3
0.6
0.6
4
CONFIGURATIONS
5
0.8
0.8
BOOSTING
6
1
1
7
35791 G02
35791 G05
35791 G08
T
A
1.2
1.2
= 25°C, unless otherwise noted.
8
1.225
1.215
1.205
1.23
1.22
1.21
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.2
80
70
60
50
40
30
20
LT3579/LT3579-1
0
–50
–50
0
Switch Current Sharing
Positive Feedback Voltage
CLKOUT Duty Cycle
–25
–25
0.5
1
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
SW1 CURRENT (A)
1.5
25
25
50
50
2
2.5
75
75
100 125 150
100 125 150
3
3.5
35791 G06
35791 G09
35791 G03
35791f
5
4