LT3508
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
Pin Voltage............................................(–0.3V), 40V
BOOST Pin Voltage ...................................................60V
BOOST Above SW Voltage ........................................30V
SHDN,
PG Voltage.....................................................40V
TRACK/SS, FB, R
T
/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
Storage Temperature Range
QFN.................................................... –65°C to 150°C
TSSOP ............................................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP .............................................................. 300°C
PIN CONFIGURATION
TOP VIEW
R
T
/SYNC
PG1
PG2
TOP VIEW
TRACK/SS1
BOOST1
SW1
V
IN1
V
IN2
SW2
BOOST2
TRACK/SS2
1
2
3
4
5
6
7
8
17
16 FB1
15 V
C1
14 PG1
13 R
T
/SYNC
12
SHDN
11 PG2
10 V
C2
9
FB2
FB1 1
TRACK/SS1 2
GND 3
GND 4
GND 5
GND 6
7
BOOST1
8
SW1
9 10 11 12
V
IN1
V
IN2
SW2
BOOST2
25
SHDN
V
C1
V
C2
18 FB2
17 TRACK/SS2
16 GND
15 GND
14 GND
13 GND
24 23 22 21 20 19
FE PACKAGE
16-LEAD PLASTIC TSSOP
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND AND MUST BE SOLDERED TO PCB
UF PACKAGE
24-LEAD (4mm 4mm) PLASTIC QFN
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 25) IS GND AND MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3508EFE#PBF
LT3508IFE#PBF
LT3508HFE#PBF
LT3508EUF#PBF
LT3508IUF#PBF
LT3508HUF#PBF
TAPE AND REEL
LT3508EFE#TRPBF
LT3508IFE#TRPBF
LT3508HFE#TRPBF
LT3508EUF#TRPBF
LT3508IUF#TRPBF
LT3508HUF#TRPBF
PART MARKING*
3508FE
3508FE
3508HFE
3508
3508
3508H
PACKAGE DESCRIPTION
16-Lead Plastic TSSOP
16-Lead Plastic TSSOP
16-Lead Plastic TSSOP
24-Lead (4mm
×
4mm) Plastic QFN
24-Lead (4mm
×
4mm) Plastic QFN
24-Lead (4mm
×
4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.*Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
3508fb
2
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