Datasheet

LT8608/LT8608B
4
Rev. D
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TYPICAL PERFORMANCE CHARACTERISTICS
No-Load Supply Current
vs Temperature
Efficiency (5V Output, Burst Mode
Operation)
Efficiency (3.3V Output, 2MHz,
Burst Mode Operation)
Efficiency (3.3V Output, 2MHz,
Burst Mode Operation)
FB Voltage Load Regulation
Line Regulation
No-Load Supply Current
(3.3V Output)
Efficiency (5V Output, Burst Mode
Operation)
I
OUT
(A)
0.00
0.25
0.50
0.75
1.00
1.25
1.50
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
Mode Operation)
8608 G01
L = 2.2µH
f
SW
= 2MHz
V
IN
= 12V
V
IN
= 24V
SYNC = 0V OR LT8608 DFN
f
SW
= 2MHz
V
IN
= 12V
V
IN
= 24V
L = 2.2µH
I
OUT
(A)
0.00
0.25
0.50
0.75
1.00
1.25
1.50
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
Mode Operation)
8608 G03
SYNC = 0V OR LT8608 DFN
f
SW
= 2MHz
V
IN
= 12V
V
IN
= 24V
L = 2.2µH
I
OUT
(mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
Mode Operation)
8608 G04
SYNC = 0V OR LT8608 DFN
TEMPERATURE (°C)
–50
–10
30
70
110
150
775
776
777
778
779
780
FB REGULATION VOLTAGE (mV)
FB Voltage
8608 G05
OUTPUT CURRENT (A)
0
0.25
0.50
0.75
1
1.25
1.50
–0.5
–0.4
–0.3
–0.2
–0.1
0.0
0.1
0.2
0.3
0.4
0.5
CHANGE IN V
OUT
(%)
Load Regulation
8608G06
INPUT VOLTAGE (V)
2
10
18
26
34
42
–0.20
–0.15
–0.10
–0.05
0.00
0.05
0.10
0.15
0.20
CHANGE IN V
OUT
(%)
8608 G07
INPUT VOLTAGE (V)
2
10
18
26
34
42
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
I
IN
(µA)
(3.3V Output)
8608 G08
SYNC = 0V OR LT8608 DFN
TEMPERATURE (°C)
–50
–10
30
70
110
150
1.3
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
3.3
INPUT CURRENT (µA)
(Not Switching)
8608 G09
SYNC = 0V OR LT8608 DFN
V
IN
= 12V
V
IN
= 24V
I
OUT
(mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
Mode Operation)
8608 G02
f
SW
= 2MHz
L = 2.2µH
SYNC = 0V OR LT8608 DFN
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