Datasheet
LT3518
2
3518fe
ABSOLUTE MAXIMUM RATINGS
V
IN
, SHDN, PWM, TGEN (Note 3)..............................40V
SW, ISP, ISN, TG ........................................................45V
TG Pin Below ISP Pin ................................................10V
FB, SYNC, SS, CTRL ...................................................6V
VC, RT, V
REF
................................................................3V
Operating Junction Temperature Range (Notes 2, 4)
LT3518E .............................................–40°C to 125°C
LT3518I ..............................................–40°C to 125°C
LT3518H ............................................–40°C to 150°C
(Note 1)
16 15 14 13
5 6 7 8
TOP VIEW
17
UF PACKAGE
16-LEAD (4mm = 4mm) PLASTIC QFN
9
10
11
12
4
3
2
1SW
SW
V
IN
SHDN
FB
VC
CTRL
PWM
TG
ISP
ISN
TGEN
V
REF
RT
SYNC
SS
T
JMAX
= 125°C, θ
JA
= 36°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
V
IN
SHDN
V
REF
RT
SYNC
SS
PWM
CTRL
SW
SW
TG
ISP
ISN
TGEN
FB
VC
17
GND
T
JMAX
= 150°C, θ
JA
= 40°C/W, θ
JC(PAD)
= 10°C/W
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3518EUF#PBF LT3518EUF#TRPBF 3518
16-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3518IUF#PBF LT3518IUF#TRPBF 3518
16-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3518HUF#PBF LT3518HUF#TPBF 3518 16-Lead (4mm × 4mm) Plastic QFN –40°C to 150°C
LT3518EFE#PBF LT3518EFE#TRPBF 3518FE 16-Lead Plastic TSSOP –40°C to 125°C
LT3518IFE#PBF LT3518IFE#TRPBF 3518FE 16-Lead Plastic TSSOP –40°C to 125°C
LT3518HFE#PBF LT3518HFE#TRPBF 3518FE 16-Lead Plastic TSSOP –40°C to 150°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/
Storage Temperature Range
QFN ....................................................–65°C to 150°C
TSSOP ...............................................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP .............................................................. 300°C