Datasheet
LT8619/LT8619-5
5
Rev A
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TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
2MHz Efficiency at V
OUT
= 3.3V
8619 G04
V
IN
= 12V
f
OSC
= 2MHz
FORCED
CONTINUOUS
MODE
PULSE-
SKIPPING
MODE
Burst Mode
OPERATION
L = 3.3µH
IHLP-2020AB-01
LOAD CURRENT (A)
0
0.2
0.4
0.6
0.8
1.0
1.2
70
75
80
85
90
95
100
EFFICIENCY (%)
Efficiency at V
OUT
= 5V
8619 G05
FORCED CONTINUOUS MODE
Burst Mode OPERATION
L = 10µH, IHLP-2020BZ-01
f
OSC
= 700kHz
12V
24V
48V
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
OUT
8619 G06
Burst Mode OPERATION
= 700kHz
OSC
f
V
IN
= 48V
IN
= 24V
V
IN
= 12V
L = 10µH, IHLP-2020BZ-01
V
V
IN
(V)
0
10
20
30
40
50
60
70
75
80
85
90
95
100
EFFICIENCY (%)
Efficiency vs V
IN
8619 G07
V
OUT
= 3.3V
f
SW
= 700kHz
FORCED CONTINUOUS MODE
L = 10µH IHLP-2020BZ-01
0.5A LOAD
1.2A LOAD
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
150
0.5
1
10
20
I
VIN
(µA)
VIN
8619 G09
f
OSC
= 700kHz
Burst Mode OPERATION
SHUTDOWN
12V
12V
60V
60V
2MHz Efficiency at V
OUT
= 3.3V Efficiency at V
OUT
= 5V Efficiency at V
OUT
= 3.3V
Efficiency vs V
IN
No Load I
VIN
at 700kHz No Load I
VIN
vs Temperature
700kHz Efficiency at V
OUT
= 5V 2MHz Efficiency at V
OUT
= 5V700kHz Efficiency at V
OUT
= 3.3V
V
IN
(V)
1
10
100
0.1
1
10
100
1k
10k
I
VIN
(µA)
No Load I
VIN
at 700kHz
8619 G08
FORCED CONTINUOUS MODE
Burst Mode OPERATION
3.3V
5V
3.3V
3.3V
V
OUT
:
PULSE-
SKIPPING
MODE
SHUTDOWN
f
OSC
= 700kHz
NO LOAD
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
700kHz Efficiency at V
OUT
= 5V
8619 G01
V
IN
= 12V
f
OSC
= 700kHz
FORCED
CONTINUOUS
MODE
PULSE-
SKIPPING
MODE
Burst Mode
OPERATION
L = 10µH
IHLP-2020BZ-01
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
700kHz Efficiency at V
OUT
= 3.3V
8619 G02
V
IN
= 12V
f
OSC
= 700kHz
FORCED
CONTINUOUS
MODE
PULSE-
SKIPPING
MODE
Burst Mode
OPERATION
L = 10µH
IHLP-2020BZ-01
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
100
1k
10k
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
2MHz Efficiency at V
OUT
= 5V
8619 G03
V
IN
= 12V
f
OSC
= 2MHz
FORCED
CONTINUOUS
MODE
PULSE-
SKIPPING
MODE
Burst Mode
OPERATION
L = 4.7µH
IHLP-2020AB-01
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