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LT8640 Datasheet(PDF) 6 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) 6 Page - Analog Devices

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LT8642-1
6
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum On-Time
Switching Frequency
Burst Frequency
Soft-Start Tracking
Soft-Start Current
Error Amp Output Current
PG Thresholds Above VREF
PG Thresholds Below VREF
RT = 18.2k
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
1.875
1.900
1.925
1.950
1.975
2.000
2.025
86421 G18
VSS = 0.5V
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
86421 G21
FB RISING
FB FALLING
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
–10.0
–9.5
–9.0
–8.5
–8.0
–7.5
–7.0
–6.5
–6.0
REF
86421 G24
FB RISING
FB FALLING
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
86421 G23
SS VOLTAGE (V)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
0.2
0.4
0.6
0.8
86421 G20
ILOAD = 3A
VOUT = 0.6V
fSW = 3MHz
Burst Mode OPERATION
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
10
15
20
25
30
35
40
86421 G17
FRONT PAGE APPLICATION
VIN = 12V
VOUT = 1.2V
LOAD CURRENT (A)
0 0.25 0.50 0.75 1 1.25 1.50 1.75 2
0
0.5
1.0
1.5
2.0
2.5
86421 G19
VC = 1.25V
FB PIN ERROR VOLTAGE (mV)
–200
–100
0
100
200
–500
–375
–250
–125
0
125
250
375
500
86421 G22



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