Datasheet
LT3505
2
3505fc
Input Voltage (V
IN
) ....................................................40V
BOOST Pin Voltage ..................................................50V
BOOST Pin Above SW Pin .........................................25V
SHDN Pin ..................................................................40V
FB Pin .........................................................................6V
V
C
Pin .........................................................................3V
R
T
Pin .........................................................................3V
ABSOLUTE MAXIMUM RATINGS
(Note 1)
TOP VIEW
9
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
4
3
2
1BOOST
SW
V
IN
SHDN
V
C
FB
R
T
GND
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 5°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
BOOST 8
7
6
5
9
V
C
FB
R
T
GND
TOP VIEW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
SW
V
IN
SHDN
T
JMAX
= 125°C, θ
JA
= 40°C/W, θ
JC
= 5°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
Operating Temperature Range (Note 2)
LT3505E .............................................. –40°C to 85°C
LT3505I ............................................. –40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................... –65°C to 150°C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3505EDD#PBF LT3505EDD#TRPBF LCHB 8-Lead (3mm x 3mm) Plastic DFN –40°C to 85°C
LT3505IDD#PBF LT3505IDD#TRPBF LCHC 8-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C
LT3505EMS8E#PBF LT3505EMS8E#TRPBF LTCNX 8-Lead Plastic MSOP –40°C to 85°C
LT3505IMS8E#PBF LT3505IMS8E#TRPBF LTCNY 8-Lead Plastic MSOP –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3505EDD LT3505EDD#TR LCHB 8-Lead (3mm x 3mm) Plastic DFN –40°C to 85°C
LT3505IDD LT3505IDD#TR LCHC 8-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C
LT3505EMS8E LT3505EMS8E#TR LTCNX 8-Lead Plastic MSOP –40°C to 85°C
LT3505IMS8E LT3505IMS8E#TR LTCNY 8-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
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/