LT3437 查看數據表（PDF） - Linear Technology
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LT3437
Linear Technology
LT3437 Datasheet PDF : 28 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LT3437
Dropout Operation
6
VOUT = 5V
ILOAD = 250mA
5 BOOST DIODE = DIODES INC B1100
Maximum Duty Cycle
vs Temperature
94.5 ILOAD = 250mA
94.0
VC Switching Threshold
vs Temperature
0.6
0.5
4
93.5
0.4
3
93.0
0.3
2
92.5
0.2
1
92.0
0.1
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
INPUT VOLTAGE (V)
3437 G19
91.5
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3437 G20
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3437 G21
Maximum Sync Frequency
vs Temperature
Burst Mode Operation
1600
1500
1400
1300
VIN = 12V
VOUT = 3.3V
IOUT = 100mA
VOUT
20mV/DIV
AC COUPLED
1200
1100
1000
900
ISW
800
100mA/DIV
700
600
500
400
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
VIN = 12V
VOUT = 3.3V
IQ = 100µA
10µs/DIV
3437 G22
Burst Mode Defeated
VOUT
20mV/DIV
AC COUPLED
ISW
100mA/DIV
3437 G23
VIN = 12V
VOUT = 3.3V
IQ = 1.7mA
VSYNC = 3.3V
10µs/DIV
3437 G24
Step Response
Step Response
VOUT
50mV/DIV
VOUT
50mV/DIV
IOUT
100mA/DIV
1ms/DIV
LOAD STEP 0mA TO 200mA
3437 G25
IOUT
100mA/DIV
1ms/DIV
LOAD STEP 100mA TO 300mA
3437 G26
3437fc
7
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