LTC3775 查看數據表（PDF） - Linear Technology
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LTC3775 Datasheet PDF : 34 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC3775
Efficiency vs Load Current
100
90
VIN = 12V
VOUT = 1.2V
80
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
70
60 PULSE-SKIPPING
50
MODE
40
30
CONTINUOUS
MODE
20
10
0
0.01
0.1
1
10
LOAD CURRENT (A)
100
3775 G01
Line Regulation
1.206
1.204
VOUT = 1.2V
LOAD = 1A
FIRST PAGE CIRCUIT
1.202
1.200
1.198
1.196
Efficiency vs Input Voltage
100
90
15A LOAD
80
Load Regulation
1.206
1.204
VIN = 12V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
1.202
70
1A LOAD
60
VOUT = 1.2V
50 CONTINUOUS MODE
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
40
4 8 12 16 20
INPUT VOLTAGE (V)
24 28
3775 G02
FB Voltage vs Temperature
603
1.200
1.198
1.196
1.194
0 2 4 6 8 10 12 14 16
LOAD CURRENT (A)
3775 G03
Load Step in Forced Continuous
Mode
602
VOUT(AC)
100mV/DIV
601
600
IL
10A/DIV
599
ILOAD
598
10A/DIV
1.194
4
8 12 16 20 24 28
INPUT VOLTAGE (V)
3775 G02
597
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3775 G05
VIN = 12V
50μs/DIV
VOUT = 1.2V
LOAD STEP = 0A TO 10A TO 0A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
3775 G06
Positive Load Step in Forced
Continuous Mode
VSW
20V/DIV
VOUT(AC)
100mV/DIV
Negative Load Step in Forced
Continuous Mode
VSW
20V/DIV
VOUT(AC)
100mV/DIV
Load Step in Pulse-Skipping Mode
VOUT(AC)
100mV/DIV
IL
10A/DIV
ILOAD
10A/DIV
VIN = 12V
5μs/DIV
VOUT = 1.2V
LOAD STEP = 0A TO 10A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
3775 G07
IL
10A/DIV
ILOAD
10A/DIV
VIN = 12V
5μs/DIV
VOUT = 1.2V
LOAD STEP = 10A TO 0A
MODE/SYNC = 0V
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
IL
10A/DIV
ILOAD
10A/DIV
3775 G08
VIN = 12V
50μs/DIV
VOUT = 1.2V
LOAD STEP = 1A TO 11A TO 1A
MODE/SYNC = INTVCC
SW FREQ = 500kHz
FIRST PAGE CIRCUIT
3775 G09
3775fa
5
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