Datasheet

LT8611
4
8611fa
For more information www.linear.com/LT8611
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
Efficiency vs Frequency Reference Voltage
EN Pin Thresholds Load Regulation Line Regulation
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
SWITCHING FREQUENCY (MHz)
0.25
90
92
96
1.75
8611 G05
88
86
0.75 1.25 2.25
84
82
94
EFFICIENCY (%)
V
IN
= 12V
V
IN
= 24V
V
OUT
= 3.3V
TEMPERATURE (°C)
–55
0.955
REFERENCE VOLTAGE (V)
0.958
0.964
0.967
0.970
0.985
0.976
5
65
95 125
8611 G06
0.961
0.979
0.982
0.973
–25
35
155
TEMPERATURE (°C)
–55
0.95
EN THRESHOLD (V)
0.96
0.98
0.99
1.00
65
1.04
8611 G07
0.97
5
–25
95 125
35 155
1.01
1.02
1.03
EN RISING
EN FALLING
LOAD CURRENT (A)
0
–0.25
CHANGE IN V
OUT
(%)
–0.15
–0.05
0.05
0.5
1
1.5 2
8611 G08
2.5
0.15
0.25
–0.20
–0.10
0
0.10
0.20
3
V
OUT
= 3.3V
V
IN
= 12V
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
2
8611 G01
70
60
75
85
95
65
55
50
0.5
1
1.5
2.5
V
IN
= 12V
V
IN
= 24V
f
SW
= 700kHz
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
2
8611 G02
70
60
75
85
95
65
55
50
0.5
1
1.5
2.5
V
IN
= 12V
V
IN
= 24V
f
SW
= 700kHz
LOAD CURRENT (mA)
0.001
40
EFFICIENCY (%)
50
60
70
80
0.01 0.1 101 100 1000 10000
8611 G03
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
f
SW
= 700MHz
LOAD CURRENT (mA)
0.0010.0001
40
EFFICIENCY (%)
50
60
70
80
0.01 0.1 1 10 100 1000
8611 G04
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
f
SW
= 700MHz
INPUT VOLTAGE (V)
0
CHANGE IN V
OUT
(%)
0.02
0.06
0.10
40
8611 G09
–0.02
–0.06
0
0.04
0.08
–0.04
–0.08
–0.10
105
2015
30 35
45
25
V
OUT
= 3.3V
I
LOAD
= 0.5A
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