Datasheet

LTC1983-3/LTC1983-5
4
1983fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Burst Mode Input Current
vs V
IN
(LTC1983-3)
V
IN
(V)
3.1
26.5
INPUT CURRENT (µA)
27.0
28.0
28.5
29.0
4.1
5.1 5.5
31.0
1983 G10
27.5
3.6 4.6
29.5
30.0
30.5
T
A
= 25°C
TEMPERATURE (°C)
–50
R
OUT
(Ω)
10
12
14
150
1983 G11
8
6
0
0
50
100
4
2
18
16
V
IN
= 5V
V
IN
= 3V
I
OUT
= 10mA
TEMPERATURE (°C)
–50
0
V
THRESHOLD
(V)
0.1
0.3
0.4
0.5
1.0
0.7
0
50
1983 G12
0.2
0.8
0.9
0.6
100
150
R
OUT
vs Temperature
(I
OUT
= 10mA)
SHDN Pin Threshold Voltage
vs Temperature
SHDN Pin Input Current
vs Temperature R
OUT
vs C
FLY
(V
IN
= 5V)
TEMPERATURE (°C)
–50
2.0
2.5
3.5
100
1983 G13
1.5
1.0
0 50 150
0.5
0
3.0
I
SHDN
(µA)
C
FLY
(µF)
0.01
1400
V
IN
= 5V
T
A
= 25°C
1200
1000
800
600
400
200
1983 G14
0.1 1
0
R
OUT
(Ω)
V
OUT
Start-Up into 100mA
Resistive Load
V
OUT
Ripple at 100mA Load
V
OUT
Ripple at 30mA Load
V
OUT
Load Step Reponse from
I
OUT
= 0 to I
OUT
= 100mA
V
OUT
1V
V
IN
5V
V
OUT
20mV
50µs/DIV 1983 G15
1µs/DIV 1983 G16
V
OUT
20mV
2.5µs/DIV
1983 G17
V
OUT
20mV
100µs/DIV
1983 G18
I
OUT
100mA