Datasheet

LT8612
4
8612fa
For more information www.linear.com/LT8612
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
Efficiency vs Frequency Reference Voltage
EN/UV Pin Thresholds Load Regulation Line Regulation
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
TEMPERATURE (°C)
–55
0.955
REFERENCE VOLTAGE (V)
0.958
0.964
0.967
0.970
0.985
0.976
5
65
95 125
8612 G06
0.961
0.979
0.982
0.973
–25
35
155
LOAD CURRENT (A)
0.00001
EFFICIENCY (%)
50
60
100
0.001
0.1
1 10
8612 G03
40
80
90
70
0.0001
0.01
f
SW
= 700kHz
L = 3.9µH
V
IN
= 24V
V
IN
= 12V
INPUT VOLTAGE (V)
0
CHANGE IN V
OUT
(%)
0.02
0.06
0.10
40
8612 G09
–0.02
–0.06
0
0.04
0.08
–0.04
–0.08
–0.10
10
20
30 50
V
OUT
= 5V
LOAD = 1A
TEMPERATURE (°C)
–55
0.95
EN/UV THRESHOLD (V)
0.96
0.98
0.99
1.00
75
8612 G07
0.97
250
–25
100 125
50 150
1.01
1.02
EN/UV RISING
EN/UV FALLING
OUTPUT LOAD (A)
0
LOAD REGULATION (%)
–0.4
–0.3
–0.1
–0.2
0
0.5
0.2
2
4
5 6
8612 G08
–0.5
0.3
0.4
0.1
1
3
LOAD CURRENT (A)
0
EFFICIENCY (%)
65
70
75
100
85
2
4
5 6
8612 G01
60
90
95
80
1
3
f
SW
= 700kHz
L = 3.9µH, EPCOS B82559
V
IN
= 24V
V
IN
= 12V
FREQUENCY (kHz)
0
EFFICIENCY (%)
75
80
100
90
1000
1500
2000 2500
8612 G05
70
95
85
500
V
OUT
= 3.3V
V
IN
= 12V
L = 3.9µH
LOAD = 2A
LOAD CURRENT (A)
0.00001
EFFICIENCY (%)
50
60
100
0.001
0.1
1 10
8612 G04
40
80
90
70
0.0001
0.01
f
SW
= 700kHz
L = 3.9µH
V
IN
= 24V
V
IN
= 12V
LOAD CURRENT (A)
0
EFFICIENCY (%)
65
70
75
100
85
2
4
5 6
8612 G02
60
90
95
80
1
3
f
SW
= 700kHz
L = 3.9µH, EPCOS B82559
V
IN
= 24V
V
IN
= 12V
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