Datasheet
LT3598
2
3598fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
SHDN ................................................................V
IN
+ 3V
V
IN
, OPENLED ...........................................................30V
SW Voltage ...............................................................45V
V
OUT
, V
O_SW
Voltage .................................................44V
LED1 to LED6 ............................................................44V
PWM, SYNC, CTRL, RT, SS, V
C
................................... 6V
(Note 1)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
FE PACKAGE
24-LEAD PLASTIC TSSOP
24
23
22
21
20
19
18
17
16
15
14
13
SW
V
OUT
V
O_SW
LED1
LED2
LED3
LED4
LED5
LED6
OPENLED
I
SET
CTRL
V
IN
SHDN
GND
V
REF
SS
RT
PWM
SYNC
NC
T
SET
FB
V
C
25
T
JMAX
= 125°C, θ
JA
= 38°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
24 23 22 21 20 19
25
7 8 9
TOP VIEW
UF PACKAGE
24-LEAD (4mm s 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
LED1
LED2
LED3
LED4
LED5
LED6
V
REF
SS
RT
PWM
SYNC
NC
V
O_SW
V
OUT
SW
V
IN
SHDN
GND
OPENLED
I
SET
CTRL
V
C
FB
T
SET
T
JMAX
= 125°C, θ
JA
= 37°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3598EUF#PBF LT3598EUF#TRPBF 3598
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3598IUF#PBF LT3598IUF#TRPBF 3598
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3598EFE#PBF LT3598EFE#TRPBF LT3598 24-Lead Plastic TSSOP –40°C to 125°C
LT3598IFE#PBF LT3598IFE#TRPBF LT3598 24-Lead Plastic TSSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
V
REF
, FB Voltage..........................................................6V
I
SET
, T
SET
.....................................................................6V
Operating Junction Temperature Range
(Note 2) ..................................................–40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range ...................–65°C to 150°C