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LTC3541 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3541
Description  High Efficiency Buck VLDO Regulator
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3541 Datasheet(HTML) 4 Page - Linear Technology

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LTC3541

3541fa
Efficiency vs Input Voltage for
Buck (Burst)
Efficiency vs Input Voltage for
Buck (Pulse Skip)
Efficiency vs Load Current for
Buck (Burst)
Efficiency vs Load Current for
Buck (Pulse Skip)
Efficiency vs Load Current for
Buck (Burst)
TYPICAL PERFOR A CE CHARACTERISTICS
INPUT VOLTAGE (V)
2
50
55
65
70
75
100
85
3
4
3541 G01
60
90
95
80
5
6
VOUT = 1.8V
IOUT = 500mA
IOUT = 30mA
IOUT = 100mA
INPUT VOLTAGE (V)
2
50
55
65
70
75
100
85
3
4
3541 G02
60
90
95
80
5
6
VOUT = 1.8V
IOUT = 500mA
IOUT = 30mA
IOUT = 100mA
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3541 G03
0
1
VOUT = 1.8V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3541 G04
0
1
VOUT = 1.8V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
LOAD cURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3541 G05
0
1
VOUT = 2.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
Efficiency vs Load Current for
Buck (Pulse Skip)
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3541 G06
0
1
VOUT = 2.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
VLDO Dropout Voltage vs
Load Current
Buck (Burst) Plus VLDO Bias
Current vs VLDO Load Current
Output (Auto Start-Up Sequence,
Buck in Pulse Skip) vs Time
LOAD CURRENT (mA)
0
0
20
40
60
80
100
50
100
150
200
3541 G07
250
300
VIN = 4.2V
VIN = 3V
VOUT = 1.5V
VIN = 3.6V
LOAD CURRENT (mA)
0.1
100
150
1000
3541 G08
50
0
1
10
100
250
200
VIN = 3.6V
ILOAD(BUCK) = 0
IBIAS = IVIN + ILVIN – ILOAD
VOUT
2V/DIV
LVOUT
2V/DIV
VIN
2V/DIV
IVOUT = 300mA
ILVOUT = 200mA
2ms/DIV
3541 G09



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