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LT8608 Datasheet(PDF) 6 Page - Linear Technology

Part # LT8608
Description  42V, 1.5A Synchronous Step-Down Regulator with 2.5關A Quiescent Current
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8608 Datasheet(HTML) 6 Page - Linear Technology

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LT8608/LT8608B
6
Rev C
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Load to Full Frequency
(SYNC Float to 1.9V)
(MSOP Package)
Frequency Foldback
Soft-Start Tracking
(MSOP Package)
Steady State Case Temperature
Rise vs Load Current (5VOUT)
Soft-Start Current vs Temperature
(MSOP Package)
Steady State Case Temperature
Rise vs Load (3.3VOUT)
VIN UVLO
Start-Up Dropout
Start-Up Dropout
INPUT VOLTAGE (V)
0
5
10
15
20
25
30
35
40
0
25
50
75
100
125
8608 G19
L = 2.2µH
VOUT = 5V
RT = 18.2k
FB VOLTAGE (V)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
RT = 18.2k
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
8608 G20
SYNC = 0V OR LT8608 DFN
SS VOLTAGE (V)
0 0.1 0.2 0.4 0.5 0.6 0.7 0.8 1.0 1.1 1.2
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Soft-Start Tracking
8608 G21
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90 110 130 150
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
Soft Start Current Vs Temperature
8608 G22
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90 110 130 150
2.00
2.25
2.50
2.75
3.00
3.25
VIN UVLO
8608 G23
VIN = 6V
VIN = 12V
VIN= 36V
IOUT (A)
0.00
0.25
0.50
0.75
1.00
1.25
1.50
0
5
10
15
20
25
30
35
40
45
50
(5V out)
8608 G24
fSW = 2MHz
L = 2.2µH
fSW = 2MHz
L = 2.2µH
VIN = 12V
VIN = 36V
IOUT (A)
0.00
0.25
0.50
0.75
1.00
1.25
1.50
0
5
10
15
20
25
30
35
40
45
50
8608 G25
RLOAD = 50Ω
INPUT VOLTAGE (V)
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Start–Up Droupout
8608 G26
VIN
VOUT
VIN
VOUT
RLOAD = 5Ω
INPUT VOLTAGE (V)
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Start-Up Droupout
8608 027



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