Datasheet

LT8620
4
8620fa
For more information www.linear.com/LT8620
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
Efficiency vs Frequency at 1A Reference Voltage
EN Pin Thresholds Load Regulation Line Regulation
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
1.751.5
8620 G01
70
60
75
85
95
65
55
50
0.25
0.5
1.0 1.250.75
2.0
V
IN
= 48V
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
f
SW
= 700kHz
L = IHLP2525CZ-01, 4.7µH
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
1.0 1.25 1.5 1.75
8620 G02
70
60
75
85
95
65
55
50
0.25
0.5
0.75
2.0
V
IN
= 48V
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
f
SW
= 700kHz
L = IHLP2525CZ-01, 4.7µH
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.01 10010 1000
8620 G03
0
0.1 1.0
V
IN
= 48V
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
f
SW
= 700kHz
L = IHLP2525CZ-01, 4.7µH
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.01 10 100 1000
8620 G04
0
0.1 1.0
V
IN
= 48V
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
f
SW
= 700kHz
L = IHLP2525CZ-01, 4.7µH
SWITCHING FREQUENCY (MHz)
0.25
88
90
94
8620 G05
86
84
1.751.250.75 2.25
82
80
92
EFFICIENCY (%)
V
IN
= 12V
V
IN
= 24V
V
OUT
= 3.3V
L = IHLP2525CZ-01, 4.7µH
TEMPERATURE (°C)
–50
0.961
REFERENCE VOLTAGE (V)
0.963
0.967
0.969
0.971
0.979
25
75
100 125
8620 G06
0.965
0.975
0.977
0.973
–25 0
50
150
TEMPERATURE (°C)
–50
0.95
EN THRESHOLD (V)
0.96
0.98
0.99
1.00
50 75
1.03
8620 G07
0.97
0
–25
100 125
25 150
1.01
1.02
EN RISING
EN FALLING
LOAD CURRENT (A)
0
–0.15
CHANGE IN V
OUT
(%)
–0.1
–0.05
0.05
0.5 1 1.5
8620 G08
0.1
0.15
0
2
V
OUT
= 5V
V
IN
= 12V
INPUT VOLTAGE (V)
5
CHANGE IN V
OUT
(%)
0.02
0.00
0.12
0.10
55
8620 G09
–0.04
–0.06
–0.02
0.08
0.06
0.04
–0.08
15
35 45 65
25
V
OUT
= 5V
I
LOAD
= 1A
T
A
= 25°C, unless otherwise noted.
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