lt3591 Linear Technology Corporation, lt3591 Datasheet - Page 3

• Manufacturer Part Number: lt3591
• Description: White Led Driver With Integrated Schottky In 3mm X 2mm Dfn
• Manufacturer: Linear Technology Corporation

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