LTC3789 Просмотр технического описания (PDF) - Linear Technology
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LTC3789 Datasheet PDF : 28 Pages
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LTC3789
Typical Performance Characteristics TA = 25°C unless otherwise noted.
Forced Continuous Mode
SW1
10V/DIV
SW2
10V/DIV
IL
1A/DIV
VIN = 6V
VOUT = 12V
4µs/DIV
Forced Continuous Mode
SW1
10V/DIV
SW2
10V/DIV
3789 G10
IL
1A/DIV
VIN = 12V
VOUT = 12V
4µs/DIV
3789 G11
Forced Continuous Mode
SW1
10V/DIV
SW2
10V/DIV
IL
1A/DIV
VIN = 18V
VOUT = 12V
4µs/DIV
3789 G12
Pulse-Skipping Mode
SW1
10V/DIV
SW2
10V/DIV
IL
1A/DIV
VIN = 6V
VOUT = 12V
4µs/DIV
Pulse-Skipping Mode
SW1
10V/DIV
SW2
10V/DIV
3789 G13
IL
1A/DIV
VIN = 12V
VOUT = 12V
2µs/DIV
Pulse-Skipping Mode
SW1
10V/DIV
SW2
10V/DIV
3789 G14
IL
1A/DIV
VIN = 18V
VOUT = 12V
2µs/DIV
3789 G15
Oscillator Frequency
vs Temperature
700
VFREQ = 2.4V
600
500
400
VFREQ = 1.2V
300
200
VFREQ = 0V
100
0
–50
0
50
100
TEMPERATURE (°C)
150
3789 G16
6
Undervoltage Threshold at INTVCC
vs Temperature
5.0
4.5
4.0
RISING
3.5
FALLING
3.0
2.5
2.0
1.5
1.0
0.5
0
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3789 G17
Undervoltage Threshold at VIN
vs Temperature
5.0
4.5
RISING
4.0
FALLING
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3789 G18
3789f
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