LTC3426 데이터 시트보기 (PDF) - Linear Technology
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LTC3426 Datasheet PDF : 12 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC3426
Oscillator Frequency
vs Temperature
1.40
1.3
1.2
1.1
1.0
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
3426 G01
Efficiency vs VIN
100
FIGURE 1 CIRCUIT
98 TA = 25°C
96
ILOAD = 150mA
VOUT = 5V
94 COUT = 22µF
L = 2.2µH
92
90
88
86
84
82
80
1.8 2.2 2.6 3 3.4
VIN (V)
3.8 4.2
LT1108 • TPC12
IOUT(MAX) vs VIN
1.3
FIGURE 1 CIRCUIT
TA = 25°C
1.1
VOUT = 5V
COUT = 22µF
L = 2.2µH
0.9
0.7
0.5
0.3
1.8 2.2 2.6 3 3.4
VIN (V)
3.8 4.2
3426 G03
RDS(ON) vs Temperature
0.15
0.14
0.13
0.12
VOUT = 2.5V
0.11
0.10
VOUT = 5V
0.09
VOUT = 3.3V
0.08
0.07
0.06
0.05
–50 –25 0
25 50
75 100
TEMPERATURE (°C)
3426 G04
FB Pin Voltage
1.25
1.24
Switching Waveforms
VOUT
500mV/DIV
1.23
SW
2V/DIV
1.22
1.21
IL
200mA/DIV
1.20
1.19
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
3426 G05
VIN = 1.8V
VOUT = 3.3V
COUT = 22µF
L = 2.5µH
100ns/DIV
3426 G06
SW Pin Antiringing Operation
VOUT Transient Response
SW
1V/DIV
VOUT
500mV/DIV
IOUT
200mA/DIV
250mA
500mA
IL
50mA/DIV
VIN = 1.8V
VOUT = 3.3V
100ns/DIV
3426 G07
IL
500mA/DIV
VIN = 1.8V
VOUT = 3.3V
COUT = 22µF
L = 2.5µH
40µs/DIV
3426 G08
3426fa
3
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