Datasheet
LT3508
2
3508fd
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
Pin Voltage ............................................(–0.3V), 40V
BOOST Pin Voltage ...................................................60V
BOOST Above SW Voltage ........................................30V
SHDN, PG Voltage .....................................................40V
TRACK/SS, FB, RT/SYNC, V
C
Voltage ..........................6V
Operating Junction Temperature Range (Note 2)
LT3508E ............................................. –40°C to 125°C
LT3508I .............................................. –40°C to 125°C
LT3508H ............................................ –40°C to 150°C
(Notes 1, 7)
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
TRACK/SS1
BOOST1
SW1
V
IN1
V
IN2
SW2
BOOST2
TRACK/SS2
FB1
V
C1
PG1
RT/SYNC
SHDN
PG2
V
C2
FB2
17
GND
θ
JA
= 40°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND AND MUST BE SOLDERED TO PCB
24 23 22 21 20 19
7 8 9
TOP VIEW
25
GND
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
FB1
TRACK/SS1
GND
GND
GND
GND
FB2
TRACK/SS2
GND
GND
GND
GND
V
C1
PG1
RT/SYNC
SHDN
PG2
V
C2
BOOST1
SW1
V
IN1
V
IN2
SW2
BOOST2
θ
JA
= 40°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 25) IS GND AND MUST BE SOLDERED TO PCB
Storage Temperature Range
QFN .................................................... –65°C to 150°C
TSSOP ............................................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP .............................................................. 300°C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3508EFE#PBF LT3508EFE#TRPBF 3508FE 16-Lead Plastic TSSOP –40°C to 125°C
LT3508IFE#PBF LT3508IFE#TRPBF 3508FE 16-Lead Plastic TSSOP –40°C to 125°C
LT3508HFE#PBF LT3508HFE#TRPBF 3508HFE 16-Lead Plastic TSSOP –40°C to 150°C
LT3508EUF#PBF LT3508EUF#TRPBF 3508
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3508IUF#PBF LT3508IUF#TRPBF 3508
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3508HUF#PBF LT3508HUF#TRPBF 3508H
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 150°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.*Temperature grades are 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/