LT3681 データシートの表示（PDF） - Linear Technology
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LT3681
Linear Technology
LT3681 Datasheet PDF : 24 Pages
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LT3681
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.
Error Amp Output Current
100
80
60
40
20
0
–20
–40
–60
–80
1.065
1.165 1 .265 1.365
FB PIN VOLTAGE (V)
1.465
3681 G19
Minimum Input Voltage
4.5
4.0
3.5
3.0
2.5 VOUT = 3.3V
L = 4.7m
f = 800kHz
2.0
0.001 0.01
0.1
1
LOAD CURRENT (A)
10
3681 G20
Minimum Input Voltage
6.5
6.0
5.5
5.0
4.5 VOUT = 5.0V
L = 4.7m
f = 800kHz
4.0
0.001 0.01
0.1
1
LOAD CURRENT (A)
10
3681 G20
VC Voltages
2.50
2.00
CURRENT LIMIT CLAMP
1.50
1.00
SWITCHING THRESHOLD
0.50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3681 G22
Power Good Threshold
1.200
1.180
1.160
1.140
Switching Waveforms;
Burst Mode
IL
0.5A/DIV
VIN = 12V; FRONT PAGE APPLICATION
ILOAD = 10mA
VSW
5V/DIV
1.120
PG RISING
1.100
–50 –25
0 25 50 75
TEMPERATURE (°C)
VOUT
10mV/DIV
100 125
3681 G23
2µs/DIV
3681 G24
Switching Waveforms; Transition
from Burst Mode to Full
Frequency
IL
0.5A/DIV
Switching Waveforms; Full
Frequency Continuous Operation
IL
0.5A/DIV
VRUN/SS
5V/DIV
VRUN/SS
5V/DIV
VOUT
10mV/DIV
VIN = 12V; FRONT PAGE APPLICATION
ILOAD = 140mA
1µs/DIV
3681 G25
VOUT
10mV/DIV
VIN = 12V; FRONT PAGE APPLICATION
ILOAD = 1A
1µs/DIV
3681 G26
6
Power Schottky Diode Forward
Voltage vs Current
6000
5000
4000
3000
2000
1000
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
FORWARD VOLTAGE (V)
3681 G29
3681f
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