LT3508_15 Datasheet, PDF (2/26 Pages) Linear Technology – Dual Monolithic 1.4A Step-Down Switching Regulator

LT3508
ABSOLUTE MAXIMUM RATINGS (Notes 1, 7)
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
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
TRACK/SS1 1
BOOST1 2
SW1 3
V_IN1 4
V_IN2 5
SW2 6
BOOST2 7
TRACK/SS2 8
TOP VIEW
16 FB1
15 V_C1
14 PG1
17
13 RT/SYNC
GND
12 SHDN
11 PG2
10 V_C2
9 FB2
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
TOP VIEW
24 23 22 21 20 19
FB1 1
TRACK/SS1 2
GND 3
GND 4
GND 5
GND 6
18 FB2
17 TRACK/SS2
25
16 GND
GND
15 GND
14 GND
13 GND
7 8 9 10 11 12
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
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 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/
3508fd
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