Datasheet
LT3599
2
3599fe
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
, SHDN/UVLO, OPENLED, SHORTLED ..................30V
SHDN/UVLO Pin Above V
IN
.........................................3V
SW ............................................................................45V
V
OUT
, V
O_SW
.............................................................. 45 V
LED1, LED2, LED3, LED4 ..........................................45V
PWM, SYNC, CTRL, FB, T
SET
, DISABLE4 ....................6V
V
C
, SS .........................................................................3V
V
REF
, RT, I
SET
.............................................................. 2V
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3599EFE#PBF LT3599EFE#TRPBF LT3599FE 28-Lead Plastic TSSOP –40°C to 125°C
LT3599IFE#PBF LT3599IFE#TRPBF LT3599FE 28-Lead Plastic TSSOP –40°C to 125°C
LT3599HFE#PBF LT3599HFE#TRPBF LT3599FE 28-Lead Plastic TSSOP –40°C to 150°C
LT3599EUH#PBF LT3599EUH#TRPBF 3599
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LT3599IUH#PBF LT3599IUH#TRPBF 3599
32-Lead (5mm × 5mm) Plastic QFN
–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/
Operating Junction Temperature Range (Note 2)
LT3599E/LT3599I .............................. –40°C to 125°C
LT3599H ............................................ –40°C to 150°C
Maximum Junction Temperature
LT3599E/LT3599I ............................................. 125°C
LT3599H ........................................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, sec) (Note 5) .........300°C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SW
V
OUT
V
O_SW
LED1
LED2
LED3
LED4
DISABLE4
SHORTLED
NC
OPENLED
NC
I
SET
CTRL
V
IN
SHDN/UVLO
NC
GND
V
REF
SS
RT
PWM
NC
SYNC
NC
T
SET
FB
V
C
29
T
JMAX
= 150°C, θ
JA
= 28°C/W , θ
JC
= 10°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
32
33
31 30 29 28 27 26 25
9 10 11 12
TOP VIEW
UH PACKAGE
32-LEAD (5mm s 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1V
OUT
V
O_SW
LED1
LED2
LED3
LED4
DISABLE4
SHORTLED
NC
NC
GND
V
REF
SS
RT
PWM
SYNC
NC
NC
NC
SW
VIN
SHDN/UVLO
NC
NC
NC
NC
OPENLED
I
SET
CTRL
V
C
FB
T
SET
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB