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LT8646SEVPBF Datasheet(PDF) 5 Page - Analog Devices

Part # LT8646SEVPBF
Description  65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current
PDF  30 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8646SEVPBF Datasheet(HTML) 5 Page - Analog Devices

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LT8645S/LT8646S
5
Rev. B
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
12VIN to 5VOUT Efficiency
vs Frequency
12VIN to 3.3VOUT Efficiency
vs Frequency
Efficiency at 5VOUT
Efficiency at 3.3VOUT
LT8645S Low Load Efficiency
at 5VOUT
LT8645S Low Load Efficiency at
3.3VOUT
Efficiency vs Frequency
LT8646S Low Load Efficiency
at 5VOUT
LT8646S Low Load Efficiency at
3.3VOUT
EFFICIENCY
POWER LOSS
L = XEL6060
500kHz, L = 2.7µH
1MHz, L = 2.2µH
2MHz, L = 1µH
LOAD CURRENT (A)
1
2
3
4
5
6
7
8
60
65
70
75
80
85
90
95
100
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
8645S G01
EFFICIENCY
POWER LOSS
L = XEL6060
500kHz, L = 2.7µH
1MHz, L = 1.5µH
2MHz, L = 0.82µH
LOAD CURRENT (A)
1
2
3
4
5
6
7
8
60
65
70
75
80
85
90
95
100
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
8645S G02
fSW = 500kHz
L = XEL6060, 2.7µH
EFFICIENCY
POWER LOSS
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
8
50
55
60
65
70
75
80
85
90
95
100
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
8645S G03
fSW = 500kHz
L = XEL6060, 2.7µH
EFFICIENCY
POWER LOSS
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
8
50
55
60
65
70
75
80
85
90
95
100
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
8645S G04
VOUT = 3.3V
ILOAD = 2A
L = XEL6060, 4.7µH
VIN = 12V
VIN = 24V
SWITCHING FREQUENCY (MHz)
0.4
0.7
1
1.3
1.6
1.9
2.2
80
82
84
86
88
90
92
94
96
8645S G09
fSW = 500kHz
L = WE–LHMI7050, 4.7µH
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (mA)
0.01
0.1
1
10
100
1000
20
30
40
50
60
70
80
90
100
8645S G05
fSW = 500kHz
L = WE–LHMI7050, 4.7µH
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (mA)
0.1
1
10
100
1000
10
20
30
40
50
60
70
80
90
100
OUT
8645S G06
fSW = 500kHz
L = WE–LHMI7050, 4.7µH
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (mA)
0.01
0.1
1
10
100
1000
20
30
40
50
60
70
80
90
100
8645S G07
fSW = 500kHz
L = WE–LHMI7050, 4.7µH
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
LOAD CURRENT (mA)
0.1
1
10
100
1000
10
20
30
40
50
60
70
80
90
100
LT8646S Low Load Efficiency at 3.3VOUT
8645S G08



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