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LTC3103EDD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC3103
4
3103fa
For more information www.linear.com/LTC3103
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Output Current
Efficiency vs Input Voltage
(Automatic Burst Mode Operation)
Application No-Load Input Current
vs Supply Voltage (Automatic
Burst Mode Operation)
T
A
= 25°C unless otherwise noted
OUTPUT CURRENT (A)
65
EFFICIENCY (%)
95
100
60
55
90
75
85
80
70
0.0001 0.01 0.1 1
3103 G01
50
0.001
V
IN
= 4V
V
IN
= 7V
V
IN
= 10V
V
IN
= 15V
V
OUT
= 3.3V
L = 15µH
INPUT VOLTAGE (V)
2
EFFICIENCY (%)
95
8
3103 G02
80
70
4 6 10
65
50
60
55
100
90
85
75
12 14 16
V
OUT
= 2.2V
L = 10µH
I
LOAD
= 300mA
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 1mA
I
LOAD
= 100µA
INPUT VOLTAGE (V)
0
1.6
1.9
1.8
1.7
2.0
2.1
2 4 6 8
10 12 14 16 18
FRONT PAGE APPLICATION
Efficiency vs Output Current
(Forced Continuous Operation)
Efficiency vs Input Voltage
(Forced Continuous Operation)
Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature R
DS(ON)
vs Temperature
Application No-Load Input Current
vs Supply Voltage (Forced
Continuous Operation)
OUTPUT CURRENT (A)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.0001 0.01 0.1 1
3103 G04
0
0.001
V
IN
= 3.7V
V
IN
= 5V
V
IN
= 7V
V
IN
= 10V
V
IN
= 15V
V
OUT
= 3.3V
L = 10µH
INPUT VOLTAGE (V)
3
0
10
30
40
50
70
7
11
13 15
20
80
90
60
5 9
V
OUT
= 3.3V, L = 10µH
I
LOAD
= 300mA
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 1mA
INPUT VOLTAGE (V)
2
2.0
2.5
3.5
8 12
3103 G06
1.5
1.0
4 6
10 14 16
0.5
0
3.0
INPUT CURRENT (mA)
FRONT PAGE APPLICATION
TEMPERATURE (°C)
–60
CHANGE IN V
FB
(%)
0.25
0.50
0.75
100
3103 G07
0
–0.25
–0.50
–20–40
200
60 80 120
40
140
NORMALIZED TO 25°C
TEMPERATURE (°C)
–50
–10
FREQUENCY CHANGE (%)
–8
–4
–2
0
10
4
0
50
75
3103 G08
–6
6
8
2
–25 25
100
125
150
NORMALIZED TO 25°C
TEMPERATURE (°C)
–50
CHANGE IN RESISTANCE (%)
40
25
3103 G09
10
–10
–25 0 50
–20
–30
50
30
20
0
75 100
125
NORMALIZED TO 25°C
V
IN
= 10V
SYNCHRONOUS
RECTIFIER
MAIN
SWITCH
LTC3103
5
3103fa
For more information www.linear.com/LTC3103
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted
Application No-Load Input Current
vs Temperature (Automatic Burst
Mode Operation)
SW Leakage vs Temperature
Peak Current Limit Change
vs Temperature
TEMPERATURE (°C)
–50
LEAKAGE CURRENT (nA)
350
25
3103 G10
200
100
–25 0 50
50
0
400
300
250
150
75 100
150
125
V
IN
= 10V
MAIN
SWITCH
SYNCHRONOUS
RECTIFIER
TEMPERATURE (°C)
–50
PEAK CURRENT LIMIT CHANGE (%)
–2.5
0
2.5
40
100
3103 G11
–5.0
–7.5
–10.0
–20 10 70
5.0
7.5
10.0
130
TEMPERATURE (°C)
–50
INPUT CURRENT (µA)
2.2
2.6
110
3103 G12
1.8
1.6
1.0
–10
30
70
–30
10
50
90
3.0
2.0
2.4
1.4
1.2
2.8
V
IN
= 10V
V
OUT
= 2.5V
Automatic Burst Mode Operation Forced Continuous Operation
Start-Up into Pre-Biased Output
(Automatic Burst Mode Operation)
Start-Up into Pre-Biased Output
(Forced Continuous Operation)
Start-Up from Shutdown
(Automatic Burst Mode Operation)
V
OUT
20mV/DIV
AC-COUPLED
I
L
100mA/DIV
1µs/DIV
3103 G14
I
LOAD
= 25mA
V
IN
= 10V
C
IN
= 10µF
L = 10µH
V
OUT
= 2.5V
C
OUT
= 22µF
RUN
5V/DIV
V
OUT
1V/DIV
PGOOD
5V/DIV
I
L
100mA/DIV
500µs/DIV
3103 G15
I
LOAD
= 2mA
V
IN
= 10V
C
IN
= 10µF
L = 10µH
V
OUT
= 2.5V
C
OUT
= 47µF
BURST CURRENT
PULSES
SOFT-START
PERIOD
V
BST
REFRESH
CURRENT PULSES
RUN
5V/DIV
V
OUT
1V/DIV
I
L
100mA/DIV
PGOOD
5V/DIV
500µs/DIV
3103 G16
I
LOAD
= 2mA
V
IN
= 10V
L = 10µH
V
OUT
= 2.5V
V
BST
REFRESH
CURRENT PULSES
RUN
5V/DIV
PGOOD
5V/DIV
V
OUT
1V/DIV
I
L
100mA/DIV
500µs/DIV
3103 G17
I
LOAD
= 25mA
V
IN
= 10V
L = 10µH
V
OUT
= 2.5V
Start-Up from Shutdown
(Forced Continuous Operation)
RUN
5V/DIV
V
OUT
1V/DIV
I
L
100mA/DIV
500µs/DIV
3103 G18
I
LOAD
= 5mA
V
IN
= 10V
L = 10µH
V
OUT
= 2.5V
SOFT-START
FOLDBACK PERIOD
C
OUT
= 100µF
C
OUT
= 47µF
V
IN
= 10V
C
IN
= 10µF
L = 10µH
V
OUT
= 2.2V
50µs/DIV
V
OUT
20mV/DIV
V
OUT
20mV/DIV
3103 G13
LTC3103
6
3103fa
For more information www.linear.com/LTC3103
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted
Automatic Burst Mode Threshold
vs Supply Voltage
Load Step
(Automatic Burst Mode Operation)
Load Step
(Forced Continuous Operation)
Load Regulation
(Automatic Burst Mode Operation)
Load Regulation
(Automatic Burst Mode Operation)
Load Regulation
(Automatic Burst Mode Operation)
Maximum Duty Cycle
vs Input Voltage
Minimum Input Voltage at
Maximum Duty Cycle vs Load
Current
Minimum Input Voltage at
Maximum Duty Cycle vs Load
Current
V
OUT
200mV/DIV
AC-COUPLED
I
L
200mA/DIV
I
LOAD
200mA/DIV
200µs/DIV
3103 G19
I
LOAD
= LOAD STEP, 5mA TO 300mA
V
IN
= 10V
C
IN
= 10µF
L = 10µH
V
OUT
= 2.2V
C
OUT
= 47µF
V
OUT
50mV/DIV
AC-COUPLED
I
L
100mA/DIV
I
LOAD
100mA/DIV
200µs/DIV
3103 G20
I
LOAD
= LOAD STEP, 50mA TO 200mA
V
IN
= 10V
L = 10µH
V
OUT
= 2.5V
C
OUT
= 22µF
INPUT VOLTAGE (V)
0
0
BURST THRESHOLD (I
LOAD
, mA)
20
60
80
100
140
4
8
10
3103 G27
40
160
120
2 6
12
14
16
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
V
OUT
= 5V
LOAD CURRENT (mA)
0
2.5
INPUT VOLTAGE (V)
3.0
3.5
4.0
4.5
5.5
50
100 150 200
3103 G21
250
300
5.0
V
OUT
= 4.2V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 2.2V
V
OUT
= 1.8V
V
OUT
= 1.5V
LOAD CURRENT (mA)
0
5
INPUT VOLTAGE (V)
7
9
11
50
100
150 200
3103 G22
250
13
15
6
8
10
12
14
300
V
OUT
= 12V
V
OUT
= 9V
V
OUT
= 5V
I
LOAD
(mA)
0
–2.0
OUT
–1.5
–1.0
–0.5
0
0.5
10 20 30 40
50
NORMALIZED AT I
LOAD
= 100mA
V
IN
= 10V
V
OUT
= 5V
C
FF
= 12pF
C
OUT
= 68µF
C
OUT
= 47µF
C
OUT
= 22µF
I
LOAD
(mA)
0
–2.0
OUT
–1.5
–1.0
–0.5
0
20 40
60
80
0.5
10 30
50
70
NORMALIZED AT I
LOAD
= 100mA
V
IN
= 10V
V
OUT
= 3.3V
C
FF
= 12pF
C
OUT
= 68µF
C
OUT
= 47µF
C
OUT
= 33µF
I
LOAD
(mA)
0
CHANGE IN V
OUT
(%)
–1.5
–1.0
–0.5
60
100
3103 G25
–2.0
–2.5
–3.0
20 40 80
0
0.5
1.0
NORMALIZED AT I
LOAD
= 100mA
V
IN
= 10V
V
OUT
= 1.8V
C
FF
= 12pF
C
OUT
= 100µF
C
OUT
= 68µF
C
OUT
= 47µF
INPUT VOLTAGE (V)
2
85
90
100
5 7
3103 G26
80
75
3 4
6 8 9
70
65
95
MAXIMUM DUTY CYCLE (%)
I
OUT
= 1mA
I
OUT
= 300mA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC3103EDD#PBF

Mfr. #:
Buy LTC3103EDD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 300mA, 15V Step-Down DC/DC Converter with Ultralow Quiescent Current
Lifecycle:
New from this manufacturer.
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