Datasheet

LTC3103
4
3103f
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
INPUT CURRENT (µA)
1.9
1.8
1.7
2.0
2.1
2.2
2 4 6 8
3103 G03
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
EFFICIENCY (%)
10
30
40
50
100
70
7
11
13 15
3103 G05
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
LDO ENABLED
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