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LTC3543EDCB#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC3543
4
3543fa
INPUT VOLTAGE (V)
2.5
0
R
DS(ON)
(mΩ)
100
200
300
3.0
3.5
4.0 4.5
3543 G07
5.0
400
500
50
150
250
350
450
5.5
SYNCHRONOUS SWITCH
MAIN SWITCH
TEMPERATURE (°C)
200
R
DS(ON)
(mΩ)
300
400
500
450
350
250
–10 20 50 80
3543 G08
125110–25–40 5 35 65 95
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 4.2V
TEMPERATURE (°C)
200
R
DS(ON)
(mΩ)
300
400
500
450
350
250
–10 20 50 80
3543 G09
125110–25–40 5 35 65 95
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 4.2V
R
DS(ON)
vs Input Voltage (V
IN
)
Main Switch Resistance
vs Temperature
Synchronous Switch Resistance
vs Temperature
INPUT VOLTAGE (V)
2.5
1.8
SWITCHING FREQUENCY (MHz)
2.0
2.2
2.4
3.0
3.5
4.0 4.5
3543 G10
5.0
2.6
2.8
1.9
2.1
2.3
2.5
2.7
5.5
TEMPERATURE (°C)
–40
SWITCHING FREQUENCY (MHz)
2.25
2.30
2.35
125
3543 G11
2.15
2.00
–10 5–25 20
5035
8065 11095
2.40
2.20
2.10
2.05
V
IN
= 3.6V
OUTPUT VOLTAGE (V)
0
LOAD CURRENT (mA)
1.52
1.54
1.56
800
3543 G12
1.50
1.48
1.46
200
400
600
1000
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 4.2V
INPUT VOLTAGE (V)
2.5
FEEDBACK VOLTAGE (mV)
594
608
610
612
3.5
4.5
5.0
3543 G13
590
604
598
600
592
606
588
602
596
3.0
4.0
5.5
TEMPERATURE (°C)
–40
588
FEEDBACK VOLTAGE (mV)
592
596
600
604
612
–10
20 50 80
3543 G14
110 125
–25
5356595
608
590
594
598
602
610
606
V
IN
= 3.6V
Switching Frequency
vs Input Voltage (V
IN
)
Switching Frequency
vs Temperature
Output Voltage vs Load Current
Feedback Voltage (V
FB
)
vs Input Voltage (V
IN
)
Feedback Voltage (V
FB
)
vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
LTC3543
5
3543fa
TEMPERATURE (°C)
–40
LEAKAGE CURRENT (pA)
500
600
700
125
3543 G15
300
0
–10 5–25 20
5035
8065 11095
800
400
200
100
V
IN
= 5.5V
RUN = 0V
SYNCHRONOUS SWITCH
MAIN SWITCH
INPUT VOLTAGE (V)
SUPPLY CURRENT (μA)
3543 G16
I
LOAD
= 0A
V
OUT
= 1.5V
PULSE SKIP MODE
Burst Mode OPERATION
2.5
0
100
200
300
400
3.0 3.5 4.0 4.5 5.0 5.5
TEMPERATURE (°C)
–40
SUPPLY CURRENT (μA)
250
300
350
125
3543 G17
150
0
–10 5–25 20
5035
8065 11095
400
200
100
50
INPUT VOLTAGE (V)
2.5
0
LEAKAGE CURRENT (pA)
200
400
600
3.0
3.5
4.0 4.5
3543 G18
5.0
800
1000
100
300
500
700
900
5.5
RUN = 0V
SYNCHRONOUS SWITCH
MAIN SWITCH
Switch Leakage (I
SW
)
vs Temperature
Dynamic Supply Current
vs Input Voltage (V
IN
)
Dynamic Supply Current
vs Temperature
Switch Leakage (I
SW
)
vs Input Voltage (V
IN
)
T
A
= 25°C, unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
Start-Up from Shutdown
Pulse Skip Operation Burst Mode Operation
200μs/DIV
INDUCTOR
CURRENT
200mA/DIV
V
OUT
1V/DIV
RUN
5V/DIV
3543 G19
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 300mA
10μs/DIV
I
L
100mA/DIV
SW
5V/DIV
V
OUT
AC COUPLED
50mV/DIV
3543 G20
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 3mA
V
MODE
= 3.6V
10μs/DIV
I
L
100mA/DIV
SW
5V/DIV
V
OUT
AC COUPLED
50mV/DIV
3543 G21
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 3mA
V
MODE
= 0V
LTC3543
6
3543fa
Load Step Load Step
Load Step
Spread Spectrum Load Step
PLL Operation PLL Operation at 3MHz
20μs/DIV
I
LOAD
200mA/DIV
I
L
200mA/DIV
V
OUT
AC COUPLED
100mV/DIV
3543 G22
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 3mA TO 200mA
V
MODE
= 0V
10μs/DIV
I
LOAD
200mA/DIV
I
L
200mA/DIV
V
OUT
AC COUPLED
100mV/DIV
3543 G24
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 100mA TO 600mA
V
MODE
= 3.6V
20μs/DIV
I
LOAD
200mA/DIV
I
L
200mA/DIV
V
OUT
AC COUPLED
200mV/DIV
3543 G23
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 3mA TO 200mA
V
MODE
= 3.6V
10μs/DIV
I
LOAD
200mA/DIV
I
L
200mA/DIV
V
OUT
AC COUPLED
100mV/DIV
3543 G25
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
= 100mA TO 200mA
V
MODE
= 0.6V
100μs/DIV
V
C1
200mV/DIV
3543 G26
C1 = 4μF
3MHz TO 1MHz STEP
100ns/DIV
SW
2V/DIV
V
MODE
2V/DIV
3543 G27
T
A
= 25°C, unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC3543EDCB#TRMPBF

Mfr. #:
Buy LTC3543EDCB#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Buck Regulator w/ PLL, Soft Start & Spread Spectrum in DFN
Lifecycle:
New from this manufacturer.
Delivery:
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