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LTC3544 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3544
Description  Quad Synchronous Step-Down Regulator
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3544 Datasheet(HTML) 5 Page - Linear Technology

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LTC3544
5
3544fa
TYPICAL PERFORMANCE CHARACTERISTICS
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 CURRENT (A)
30
100
90
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544 G08
0
0.001
VOUT = 0.8V
TA = 25°C
ALL OTHER CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 4.2V
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544 G09
0
0.001
VOUT = 1.5V
TA = 25°C
ALL OTHER
CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 4.2V
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544 G07
0
0.001
VOUT = 1.8V
TA = 25°C
ALL OTHER
CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 4.2V
Load Step Response
300mA Channel
Load Step Response
200mA Channel A
Load Step Response
200mA Channel B
Efficiency vs Load Current 100mA
Channel. All Other Channels Off
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544 G10
0
0.001
VOUT = 1.2V
TA = 25°C
ALL OTHER
CHANNELS OFF
VIN = 2.25V
VIN = 3.6V
VIN = 4.2V
LOAD (mA)
0
0.6
0.8
1.2
300
3544 G11
0.4
0.2
100
200
400
0
–0.2
1.0
VIN = 3.6V
TA = 25°C
100mA = 1.2V
200mA (A) = 0.8V
200mA (B) = 1.5V
300mA = 1.8V
Burst Mode OPERATION
RIPPLE
VOUT100
VOUT200A
VOUT200B
VOUT300
RUNx
200
μs/DIV
VIN = 3.6V
TA = 25°C
ALL CHANNELS UNLOADED
3544 G12
VOUT300
100mV/DIV
AC
COUPLED
IL
250mA/DIV
ILOAD
250mA/DIV
20
μs/DIV
VIN = 3.6V
VOUT = 1.8V
TA = 25°C
ILOAD = 600μA TO 300mA
3544 G13
VOUT200A
50mV/DIV
AC
COUPLED
IL
250mA/DIV
ILOAD
250mA/DIV
20
μs/DIV
VIN = 3.6V
VOUT = 0.8V
TA = 25°C
ILOAD = 600μA TO 200mA
3544 G14
VOUT200B
50mV/DIV
AC COUPLED
IL
250mA/DIV
ILOAD
250mA/DIV
20
μs/DIV
VIN = 3.6V
VOUT = 1.5V
TA = 25°C
ILOAD = 600μA TO 200mA
3544 G15
Load Regulation
All Channels
Start-Up Curves
All Channels



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