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LTC3545 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3545
Description  Triple 800mA Synchronous Step-Down Regulator-2.25MHz
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3545 Datasheet(HTML) 4 Page - Linear Technology

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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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