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LT8646SEVPBF 数据表(PDF) 7 Page - Analog Devices

部件名 LT8646SEVPBF
功能描述  65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current
PDF  30 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

LT8646SEVPBF 数据表(HTML) 7 Page - Analog Devices

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LT8645S/LT8646S
7
Rev. B
For more information www.analog.com
Top FET Current Limit
vs Duty Cycle
Top FET Current Limit
Switch Drop vs Temperature
Switch Drop vs Switch Current
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
Minimum On-Time
Switching Frequency
Burst Frequency
Minimum Load to Full Frequency
(Pulse-Skipping Mode)
DUTY CYCLE
0.1
0.3
0.5
0.7
0.9
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
8645S G19
5% DC
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
12
13
14
15
16
8645S G20
TOP SWITCH
BOTTOM SWITCH
SWITCH CURRENT = 1A
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
0
20
40
60
80
100
8645S G21
TOP SWITCH
BOTTOM SWITCH
SWITCH CURRENT (A)
0
1
2
3
4
5
6
7
0
50
100
150
200
250
300
350
8645S G22
VIN = 5V
VOUT SET TO REGULATE AT 5V
L = XEL6060, 1µH
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
0
50
100
150
200
250
300
350
400
8645S G23
ILOAD = 3A
VOUT = 0.97V
fSW = 2.2MHz
BURST MODE OPERATION
PULSE–SKIPPING MODE
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
25
30
35
40
45
50
8645S G24
RT = 60.4k
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
660
670
680
690
700
710
720
730
740
8645S G25
FRONT PAGE APPLICATION
VIN = 12V
VOUT = 5V
LOAD CURRENT (mA)
0
100
200
300
400
500
600
0
200
400
600
800
1000
1200
8645S G26
FRONT PAGE APPLICATION
VOUT = 5V
fSW = 1MHz
VSYNC = Float
INPUT VOLTAGE (V)
5
15
25
35
45
55
65
0
50
100
150
200
250
300
350
400
8645S G27



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