Datasheet

LTC1983-3/LTC1983-5
3
1983fa
Output Impedance vs
Input Voltage
Output Impedance
vs I
OUT
(LTC1983-5)
Efficiency vs I
OUT
(LTC1983-5)
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Efficiency vs I
OUT
I
OUT
(mA)
0
EFFICIENCY (%)
40
80
100
90
80
70
60
50
40
30
20
10
0
1983 G01
20 60
V
IN
= 2.3V
V
IN
= 3.3V
V
IN
= 5V
T
A
= 25°C
V
IN
(V)
2.35
R
OUT
(Ω)
4.35
12.5
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
1983 TA02
3.35 5.35
R
OUT
I
OUT
= 25mA
T
A
= 25°C
I
OUT
(mA)
0
R
OUT
(Ω)
40
80
100
30
25
20
15
10
5
1983 G03
20 60
V
IN
= 2.3V
V
IN
= 3.3V
V
IN
= 5V
T
A
= 25°C
I
OUT
(mA)
0.01
100
75
50
25
0
10
1983 GO4
0.1 1 100
EFFICIENCY (%)
V
IN
= 5V
V
IN
= 3.3V
V
OUT
= –3V
T
A
= 25°C
OUTPUT CURRENT (mA)
0
–2.1
–2.3
–2.5
–2.7
–2.9
–3.1
–3.3
–3.5
60 100
1983 G05
20 40
80 120
V
OUT
(V)
120°C
–40°C, 0°C, 40°C
80°C
OUTPUT CURRENT (mA)
0
2.7
V
OUT
(–V)
2.8
2.9
3.0
3.1
3.3
20
40 60 80
1983 G06
100 120
3.2
–40°C
0°C
40°C
80°C
V
IN
= 5V
–3V
OUT
vs I
OUT
Over Temperature
–3V
OUT
vs I
OUT
Over Temperature
(V
IN
= 5V)
Open-Loop Current
vs Temperature (LTC1983-5)
TEMPERATURE (°C)
–40
4.9
4.7
4.5
4.3
4.1
3.9
3.7
3.5
1983 G07
10
60 110
I
IN
(mA)
V
IN
= 5V
Burst Mode Current
vs Temperature (LTC1983-3)
TEMPERATURE (°C)
–40
I
IN
(µA)
25
30
35
1983 G08
20
15
10
10 60
40
45
50
110
V
IN
= 5V
Open-Loop Input Current
vs V
IN
(LTC1983-5)
V
IN
(V)
2.3
1.5
I
IN
(mA)
2.0
2.5
3.0
3.5
4.5
2.8
3.3 3.3 4.3
1983 G09
4.8
4.0
T
A
= 25°C