LT3980IMSE-TRPBF データシートの表示（PDF） - Linear Technology
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LT3980IMSE-TRPBF
Linear Technology
LT3980IMSE-TRPBF Datasheet PDF : 24 Pages
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LT3980
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Boost Diode
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
BOOST DIODE CURRENT (A)
2.0
3980 G19
Error Amp Output Current
50
40
30
20
10
0
–10
–20
–30
–40
–50
–200
–100
0
100
FB PIN ERROR VOLTAGE (mV)
200
3980 G20
Minimum Input Voltage,
VOUT = 5V
8
f = 400kHz
TO START
7
6
TO RUN
5
VC Voltages
2.50
CURRENT LIMIT CLAMP
2.00
1.50
1.00
SWITCHING THRESHOLD
0.50
4
1
10
100
ILOAD (mA)
Switching Waveforms:
Burst Mode Operation
1000 2000
3980 G22
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3980 G23
Switching Waveforms:
Transition from Burst Mode
Operation to Full Frequency
Minimum Input Voltage,
VOUT = 3.3V
6
f = 400kHz
TO START
5
4
TO RUN
3
2
1
10
100
1000 2000
ILOAD (mA)
3980 G21
Power Good Threshold
95
90
85
80
75
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3980 G24
Switching Waveforms: Full
Frequency Continuous Operation
VSW
5V/DIV
VSW
5V/DIV
VSW
5V/DIV
IL
0.2A/DIV
VOUT
10mV/DIV
IL
0.2A/DIV
VOUT
10mV/DIV
IL
0.5A/DIV
VOUT
10mV/DIV
VIN = 12V
VOUT = 3.3V
ILOAD = 10mA
5µs/DIV
6
3980 G25
VIN = 12V
VOUT = 3.3V
ILOAD = 110mA
1µs/DIV
3980 G26
For more information www.linear.com/LT3980
VIN = 12V
VOUT = 3.3V
ILOAD = 1A
1µs/DIV
3980 G27
3980fa
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