Datasheet

LT3497
4
3497f
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Saturation Voltage
(V
CESAT
)
Schottky Forward Voltage Drop
Shutdown Current
(V
CTRL1
= V
CTRL2
= 0V)
Sense Voltage (V
CAP
– V
LED
)
vs V
CTRL
Open-Circuit Output Clamp
Voltage
Input Current in Output Open
Circuit
Switching Waveform Transient Response
(T
A
= 25°C unless otherwise specifi ed)
SWITCH CURRENT (mA)
0
SWITCH SATURATION VOLTAGE (mV)
200
250
300
350
400
3497 G01
150
100
0
100
200
300
50
150
250
350
50
450
400
–50°C
125°C
25°C
SCOTTKY FORWARD DROP (mV)
0
SCHOTTKY FORWARD CURRENT (mA)
150
200
250
600
1000
3497 G02
100
50
0
200 400 800
300
350
400
–50°C
125°C
25°C
V
IN
(V)
0
SHUTDOWN CURRENT (µA)
9
12
15
8
3497 G03
6
3
0
2
4
6
10
–50°C
125°C
25°C
V
CTRL
(mV)
0
0
SENSE VOLTAGE (mV)
40
80
120
160
200
240
500 1000 1500 2000
3497 G04
–50°C
125°C
25°C
V
IN
(V)
0
OUTPUT CLAMP VOLTAGE (V)
32
33
8
3497 G05
31
30
2
4
6
10
34
–50°C
125°C
25°C
V
IN
(V)
2
0
INPUT CURRENT (mA)
5
10
15
20
25
30
46 810
3497 G06
–50°C
150°C
25°C
V
SW
10V/DIV
V
CAP
50mV/DIV
I
L
100mA/DIV
200ms/DIV
3497 G07
V
IN
= 3.6V
FRONT PAGE
APPLICATION CIRCUIT
V
CAP
5V/DIV
V
CTRL
5V/DIV
I
L
200mA/DIV
1ms/DIV
3497 G08
V
IN
= 3.6V
FRONT PAGE
APPLICATION CIRCUIT