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LT8640 Datasheet(PDF) 6 Page - Analog Devices

Part # LT8640
Description  42V, 10A/12A Peak Synchronous Step-Down Silent Switcher 2
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8640 Datasheet(HTML) 6 Page - Analog Devices

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LT8638S
6
Rev. 0
For more information www.analog.com
EN Pin Thresholds
Load Regulation
TYPICAL PERFORMANCE CHARACTERISTICS
Line Regulation
No-Load Supply Current
Top FET Current Limit vs
Temperature
Top FET Current Limit vs Duty Cycle
Switch RDS(ON) vs Temperature
Dropout Voltage
Minimum On-Time
EN RISING
EN FALLING
TEMPERATURE (°C)
–50 –25
0
25
50
75 100 125 150
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1.00
8638S G10
VIN = 12V
VOUT = 5V
FORCED CONTINUOUS MODE
Burst Mode OPERATION
LOAD CURRENT (A)
0
2
4
6
8
10
–1.00
–0.75
–0.50
–0.25
0
0.25
0.50
0.75
1.00
8638S G11
VOUT = 5V
ILOAD = 1A
FC MODE
LOAD CURRENT (A)
5
10
15
20
25
30
35
40
–0.20
–0.15
–0.10
–0.05
0.00
0.05
0.10
0.15
0.20
8638S G12
VOUT = 5V
L = 1µH
Burst Mode OPERATION
IN REGULATION
INPUT VOLTAGE (V)
5
10
15
20
25
30
35
40
25
50
75
100
125
150
175
200
8638S G13
DUTY CYCLE
0.1
0.3
0.5
0.7
0.9
14
15
16
17
18
19
20
8638S G14
5% DC
TEMPERATURE (°C)
–50 –25
0
25
50
75 100 125 150
17
18
19
20
21
22
23
8638S G15
TOP SWITCH
BOTTOM SWITCH
TEMPERATURE (°C)
–50 –25
0
25
50
75 100 125 150
0
5
10
15
20
25
30
35
40
8638S G16
VIN = 5V
VOUT SET TO REGULATE AT 5V
L = XGL6060, 1µH
LOAD CURRENT (A)
0
1
2
3
4
5
6
7
8
9 10
0
50
100
150
200
250
300
350
400
8638S G17
VOUT = 0.6V
ILOAD = 5A
fSW = 3MHz
FORCED CONTINOUS MODE
Burst Mode OPERATION
TEMPERATURE (°C)
–50 –25
0
25
50
75 100 125 150
15
20
25
30
35
8638S G18



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