Datasheet

LT3493
5
3493fb
SHDN Pin Current
Typical Minimum Input Voltage
(V
OUT
= 5V)
Typical Minimum Input Voltage
(V
OUT
= 3.3V)
Switch Current Limit Switch Current Limit
Operating Waveforms
Operating Waveforms,
Discontinuous Mode
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted.
V
SHDN
(V)
0
I
SHDN
(μA)
30
40
50
16
3493 G14
20
10
25
35
45
15
5
0
42
86
12 14 18
10
20
I
OUT
(mA)
1
5.0
V
IN
(V)
6.5
7.0
7.5
10 100 1000
3493 G15
6.0
5.5
TO START
TO RUN
I
OUT
(mA)
1
4.3
V
IN
(V)
4.5
4.7
4.9
5.1
10 100 1000
3493 G16
4.1
3.9
3.7
3.5
5.3
5.5
TO START
TO RUN
TEMPERATURE (°C)
–50
1.0
SWITCH CURRENT LIMIT (A)
1.1
1.3
1.4
1.5
2.0
1.7
0 25 100 125 150
3493 G17
1.2
1.8
1.9
1.6
–25 50 75
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (A)
1.2
1.6
2.0
80
3493 G18
0.8
0.4
1.0
1.4
1.8
0.6
0.2
0
20
40
60
100
V
SW
5V/DIV
I
L
0.5A/DIV
0
V
OUT
20mV/DIV
V
IN
= 12V
V
OUT
= 3.3V
I
OUT
= 0.5A
L = 10μH
C
OUT
= 10μF
1μs/DIV
3493 G19
V
SW
5V/DIV
I
L
0.5A/DIV
0
V
OUT
20mV/DIV
1μs/DIV
3493 G20
V
IN
= 12V
V
OUT
= 3.3V
I
OUT
= 50mA
L = 10μH
C
OUT
= 10μF
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