LTC3774 데이터 시트보기 (PDF) - Linear Technology
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LTC3774 Datasheet PDF : 38 Pages
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LTC3774
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency
100
VIN = 7V
90 VOUT = 1.5V
80
70
60
50
40
30
20
10
0
0.01
0.1
BURST MODE
PULSE-SKIPPING
CCM
1
ILOAD (A)
10
100
3774 G09
Power Loss
5.0
VIN = 12V
4.5 VOUT = 1.5V
4.0
BURST MODE
3.5
PULSE-SKIPPING
CCM
3.0
2.5
2.0
1.5
1.0
0.5
0
0.01
0.1
1
ILOAD (A)
10
100
3774 G12
Regulated Feedback Voltage
vs Temperature
604.5
603.0
601.5
600.0
598.5
597.0
595.5
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3774 G15
Power Loss
5.0
VIN = 7V
4.5 VOUT = 1.5V
4.0
BURST MODE
3.5
PULSE-SKIPPING
CCM
3.0
2.5
2.0
1.5
1.0
0.5
0
0.01
0.1
1
ILOAD (A)
10
100
3774 G10
TK/SS Pull-Cup Current
vs Temperature
1.5
1.4
1.3
1.2
1.1
1
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3774 G13
Oscillator Frequency
vs Temperature
700
675
650
625
600
575
550
525
500
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3774 G16
6
For more information www.linear.com/LTC3774
Efficiency
100
VIN = 12V
90 VOUT = 1.5V
80
70
60
50
40
30
20
10
0
0.01
0.1
BURST MODE
PULSE-SKIPPING
CCM
1
ILOAD (A)
10
100
3774 G11
RUN Threshold vs Temperature
1.4
1.3
ON
1.2
OFF
1.1
1.0
0.9
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3774 G14
Undervoltage Lockout Threshold
(INTVCC) vs Temperature
5.0
4.8
4.6
4.4
RISE
4.2
4.0
FALL
3.8
3.6
3.4
3.2
3.0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3774 G17
3774f
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