LT3506 LINER [Linear Technology], LT3506 Datasheet - Page 4

• Manufacturer Part Number: LT3506
• Description: Dual Monolithic 1.6A Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

LT3506/LT3506A
TYPICAL PERFOR A CE CHARACTERISTICS

100
1.2
1.0
1.8
1.6
1.4
90
70
30
80
60
50
40
40
30
20
10
0
0
0
0
Maximum Load Current,
V
Boost Pin Current
Efficiency, V
T
V
L = 4.7µH (COILCRAFT MSS6122-472MLB)
T
T
OUT
A
A
A
OUT
= 25°C
= 25°C
= 25°C
0.2
2
= 1.8V
= 1.8V (LT3506A)
0.5
0.4
4
OUTPUT CURRENT (A)
SWITCH CURRENT (A)
INPUT VOLTAGE (V)*
L = 1µH
0.6
6
OUT
L = 1.5µH
= 1.8V (LT3506A)
0.8
1.0
8
1.0
10
L = 2.2µH
1.2
12
1.5
W
V
V
V
IN
IN
IN
= 4.5V
= 12V
= 25V
1.4
14
3506 G04
3506 G01
3506 G07
U
16
1.6
2.0
3.0
2.5
2.0
1.5
1.0
0.5
0
1.2
1.0
1.8
1.6
1.4
0
Current Limit vs Duty Cycle
100
T
95
90
85
80
75
70
65
60
50
55
A
0
Maximum Load Current,
V
SLOPE COMPENSATION REQUIRES
L > 2.2µH FOR V
T
= 25°C
OUT
Efficiency, V
0
A
V
L = 6.4µH (SUMIDA CR54-6R4)
T
= 25°C
A
OUT
20
= 25°C
TYPICAL
= 3.3V (LT3506A)
V
= 3.3V
5
IN
MINIMUM
DUTY CYCLE (%)
= 25V
0.4
INPUT VOLTAGE (V)*
40
IN
10
OUT
< 7 WITH V
L = 2.2µH
V
I
OUT
IN
60
= 3.3V (LT3506)
0.8
L = 4.7µH
L = 3.3µH
= 12V
(A)
15
OUT
80
= 3.3V
1.2
20
3506 G08
V
IN
3506 G05
100
= 5V
3506 G02
25
1.6
700
650
600
550
500
–50
Frequency vs Temperature
100
400
300
200
100
80
95
90
85
75
70
65
60
55
50
0
–25
0
0
Efficiency, V
Switch V
V
L = 10µH (COOPER UP1B-100)
T
T
OUT
A
A
LT3506
= 25°C
= 25°C
V
0
= 5V
TEMPERATURE (°C)
IN
= 25V
0.5
LT3506A
0.4
CESAT
25
SW CURRENT (A)
OUT
V
50
I
OUT
IN
1.0
= 5V (LT3506)
0.8
= 15V
(A)
75
100
1.2
1.5
3506 G10
V
IN
125
= 8V
3506 G03
3506 G06
1.20
1.15
1.10
1.05
1.00
3506afb
1.6
2.0