LT3640 Просмотр технического описания (PDF) - Linear Technology
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LT3640 Datasheet PDF : 24 Pages
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LT3640
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Full Frequency Waveforms
Light Load Operation Waveforms
SW1
10V/DIV
IL1
0.5A/DIV
SW2
5V/DIV
IL2
0.5A/DIV
200ns/DIV
VIN1 = 12V
VIN2 = VOUT1
VOUT1 = 3.3V/0.5A VOUT2 = 1.8V/0.5A
3640 G18
SW1
10V/DIV
IL1
0.5A/DIV
SW2
5V/DIV
IL2
0.5A/DIV
500ns/DIV
3640 G19
VIN1 = 12V
VIN2 = VOUT1
VOUT1 = 3.3V/25mA VOUT2 = 1.8V/30mA
Watchdog Upper Boundary
Period vs CWDT
180
160
140
120
100
80
60
40
20
0
0
1000 2000 3000 4000 5000
CWDT CAPACITANCE (pF)
3640 G20
Watchdog Upper Boundary
Period vs Temperature
35
30
25
RST/WDO Pull-Up Current
20
15
20
10
15
10
5
5
0
–50
0
50
100
TEMPERATURE (°C)
150
3640 G21
0
0
0.5
1
1.5
2
RST/WDO VOLTAGE (V)
3640 G22
3640f
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