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LT8640 Datasheet(PDF) 5 Page - Analog Devices

Part # LT8640
Description  18V, 10A Synchronous Step-Down Silent Switcher
PDF  26 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8640 Datasheet(HTML) 5 Page - Analog Devices

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LT8642-1
5
Rev. 0
For more information www.analog.com
Reference Voltage
TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit vs Duty Cycle
Top FET Current Limit
Switch RDS(ON) vs Temperature
EN Pin Thresholds
Load Regulation
Line Regulation
Dropout Voltage
No-Load Supply Current
EN RISING
EN FALLING
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1.00
1.01
86421 G09
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
588
590
592
594
596
598
600
602
604
606
86421 G08
VOUT = 1.2V
Burst Mode OPERATION
FORCED CONTINUOUS MODE
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
8
9 10
–1.00
–0.75
–0.50
–0.25
0
0.25
0.50
0.75
1.00
86421 G10
VIN = 12V
VOUT = FB
ILOAD = 1A
FC MODE
INPUT VOLTAGE (V)
4
6
8
10
12
14
16
18
–0.10
–0.08
–0.06
–0.04
–0.02
0.00
0.02
0.04
0.06
0.08
0.10
86421 G11
VOUT = 1.2V
L = 0.28µH
R1, R2 = 100k
Burst Mode OPERATION
IN REGULATION
INPUT VOLTAGE (V)
4
6
8
10
12
14
16
18
200
210
220
230
240
250
260
270
280
290
300
86421 G12
DUTY CYCLE
0.1
0.3
0.5
0.7
0.9
12
13
14
15
16
17
18
86421 G13
5% DC
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
14
15
16
17
18
19
20
21
22
86421 G14
TOP SWITCH
BOTTOM SWITCH
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
0
5
10
15
20
25
30
86421 G15
VIN = 3.3V
VOUT SET TO REGULATE AT 3.3V
L = XEL6060, 0.82µH (DCR = 3mΩ)
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
8
9 10
0
50
100
150
200
250
300
350
400
86421 G16



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