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LTC3544BEUD データシート(PDF) 4 Page - Linear Technology

部品番号 LTC3544BEUD
部品情報  Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA
PDF  16 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LTC3544BEUD データシート(HTML) 4 Page - Linear Technology

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LTC3544B
4
3544bfa
TYPICAL PERFORMANCE CHARACTERISTICS
VREF vs Temperature at 2.25V,
3.6V, 5.5V
Switching Frequency vs Supply
Voltage and Temperature
Efficiency vs Load Current 300mA
Channel. All Other Channels at
50% Peak Current
Efficiency vs Load Current 300mA
Channel. All Other Channels Off
Efficiency vs Load Current 200mA
Channel A. All Other Channels Off
Efficiency vs Load Current 200mA
Channel B. All Other Channels Off
Load Regulation, All Channels
Efficiency vs Load Current 100mA
Channel. All Other Channels Off
Efficiency vs Supply Voltage, All
Channels 50% Loaded
TEMPERATURE (
°C)
–50
0.785
0.790
0.795
0.800
0805
0.810
0.815
0
50
100
3544B G01
VIN = 2.25V
VIN = 3.6V
VIN = 5.5V
CHANNEL 200A
ILOAD = 100mA
ALL CHANNELS OPERATING
SUPPLY VOLTAGE (V)
2
1.5
2.0
2.5
3.0
34
3544B G02
56
fOSC –40°C
fOSC 0°C
fOSC 25°C
fOSC 80°C
ILOAD CHANNEL 100 = 50mA
ALL CHANNELS OPERATING
LOAD CURRENT 300mA CHANNEL (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B G03
0
0.001
VIN = 3.6V
VOUT = 1.8V
TA = 25°C
ALL OTHER CHANNELS LOADED 50%
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B G04
0
0.001
VOUT = 1.8V
TA = 25°C
ALL OTHER CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 5.5V
LOAD CURRENT (A)
30
90
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B G05
0
0.001
VOUT = 0.8V
TA = 25°C
ALL OTHER CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 5.5V
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B G06
0
0.001
VOUT = 1.5V
TA = 25°C
ALL OTHER CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 5.5V
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B G07
0
0.001
VOUT = 1.2V
TA = 25°C
ALL OTHER CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 5.5V
LOAD (mA)
0
0.6
0.8
1.2
300
3544B G09
0.4
0.2
100
200
400
0
–0.2
1.0
100mA
200mA (A)
200mA (B)
300mA
VIN = 3.6V
TA = 25°C
CHANNELS NOT UNDER
TEST HELD AT CONSTANT
50% MAXIMUM LOAD
SUPPLY VOLTAGE (V)
2
70
80
3544B G08
60
50
3
4
5
100
90
VOUT100 = 1.2V
VOUT200A = 0.8V
VOUT200B = 1.5V
VOUT300 = 1.8V
TA = 25°C



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