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LTC3545 数据表(PDF) 4 Page - Linear Technology

部件名 LTC3545
功能描述  Triple 800mA Synchronous Step-Down Regulator-2.25MHz
PDF  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3545 数据表(HTML) 4 Page - Linear Technology

  LTC3545 Datasheet HTML 1Page - Linear Technology LTC3545 Datasheet HTML 2Page - Linear Technology LTC3545 Datasheet HTML 3Page - Linear Technology LTC3545 Datasheet HTML 4Page - Linear Technology LTC3545 Datasheet HTML 5Page - Linear Technology LTC3545 Datasheet HTML 6Page - Linear Technology LTC3545 Datasheet HTML 7Page - Linear Technology LTC3545 Datasheet HTML 8Page - Linear Technology LTC3545 Datasheet HTML 9Page - Linear Technology Next Button
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LTC3545/LTC3545-1
4
35451fb
Burst Mode Operation
Efficiency vs Supply Voltage
Supply Current vs Temperature
Burst Mode Operation
TYPICAL PERFORMANCE CHARACTERISTICS
VREF vs Temperature at 2.25V,
3.6V, 5.5V
Switching Frequency vs Supply
Voltage and Temperature
Load Regulation, All Channels
TEMPERATURE (°C)
–50
0.585
0.590
0.595
0.600
0.605
0.610
0.615
0
50
150
100
3545 G01
2.25V
3.6V
5.5V
SUPPLY VOLTAGE (V)
2
1.5
2.0
2.5
3.0
34
3545 G02
56
fOSC = –40°C
fOSC = 0°C
fOSC = 25°C
fOSC = 80°C
LOAD CURRENT (mA)
0
0.6
0.8
1.2
600
3545 G03
0.4
0.2
200
400
800
0
–0.4
–0.2
1.0
CHANNEL 1
CHANNEL 2
CHANNEL 3
TA = 25°C
VIN = 3.6V
UNTESTED CHANNELS OFF
PULSE SKIP MODE
1μs/DIV
SW
2V/DIV
IL
100mA/DIV
VOUT
20mV/DIV
3545 G04
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA
fOSC = 2.25MHz
SUPPLY VOLTAGE (V)
2
90
95
6
3545 G05
85
80
3
4
5
100
VOUT = 2V
TA = 25°C
CHANNEL 3, ALL OTHERS OFF
fOSC = 2.25MHz
ILOAD = 250mA
TEMPERATURE (°C)
0
20
60
3545 G06
10
30
50
40
VIN = 5.5V
VIN = 4.5V
VIN = 3.5V
VIN = 2.5V
VFB3 = 0.625V
ILOAD = 0mA
CHANNEL 3 ONLY
–50
0
50
150
100



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