LT3591
3
3591f
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Saturation Voltage
(V
CESAT
)
Schottky Forward Voltage Drop
Shutdown Current (V
CTRL
= 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
SWITCH CURRENT (mA)
0
500
400
300
200
100
0
300
600
3591 G01
100 200
400
800
700
500
SWITCH SATURATION VOLTAGE (mV)
– 50
°
C
125
°
C
25
°
C
SCHOTTKY FORWARD DROP (mV)
SCHOTTKY FORWARD CURRENT (mA)
200
300
3591 G02
100
0
600
500
400
0
200
400
600
800
1000
1200
– 50
°
C
125
°
C
25
°
C
V
IN
(V)
0
SHUTDOWN CURRENT (
µ
A)
9
12
15
12
3591 G03
6
3
0
3
6
9
– 50
°
C
125
°
C
25
°
C
V
CTRL
(mV)
SENSE VOLTAGE (mV)
80
120
3591 G04
40
0
240
200
160
0
500
1000
1500
2000
2500
3000
– 50
°
C
25
°
C
125
°
C
V
IN
(V)
0
OUTPUT CLAMP VOLTAGE (V)
42
43
12
3591 G05
41
40
3
6
9
45
44
– 50
°
C
125
°
C
25
°
C
V
IN
(V)
0
INPUT CURRENT (mA)
3
6
9
12
3591 G06
– 50
°
C
125
°
C
4
5
6
3
2
0
1
8
7
25
°
C
V
SW
20V/DIV
V
CAP
50mV/DIV
I
L
200mA/DIV
V
IN
= 3.6V
FRONT PAGE
APPLICATION CIRCUIT
500ms/DIV
3591 G07
V
CTRL
5V/DIV
V
CAP
5V/DIV
I
L
500mA/DIV
V
IN
= 3.6V
FRONT PAGE
APPLICATION CIRCUIT
1ms/DIV
3591 G08
T
A
= 25°C, unless otherwise specifi ed.