LT3668_15 Datasheet, PDF (2/28 Pages) Linear Technology – 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs

LT3668
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
ADJ2, ADJ3 Voltage.................................................±45V
OUT2, OUT3 Voltage................................................±45V
IN2 Voltage..............................................................±45V
OUT2 – IN2 Differential Voltage...............................±45V
OUT3 – IN3/BD Differential Voltage.........................±45V
OUT2 – ADJ2 Differential Voltage............................±45V
OUT3 – ADJ3 Differential Voltage............................±45V
IN1, EN Voltage (Note 3)............................................60V
IN1 Reverse Voltage................................................–0.3V
EN Pin Current........................................................–1mA
IN3/BD Voltage..........................................................30V
BOOST Pin Voltage....................................................50V
BOOST Pin Above SW Pin..........................................30V
RT Voltage...................................................................2V
FB1 Voltage..................................................................6V
EN2/ILIM2, EN3/ILIM3 Voltage....................................4V
PG Voltage.................................................................30V
Operating Junction Temperature Range (Notes 4, 5)
E-, I-Grade.......................................... −40°C to 125°C
H-Grade.............................................. −40°C to 150°C
Storage Temperature Range................... −65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
PIN CONFIGURATION
TOP VIEW
SW 1
16 DA
BOOST 2
15 IN1
EN 3
14 PG
RT 4
17
13 EN3/ILIM3
IN3/BD 5
GND
12 EN2/ILIM2
OUT3 6
11 IN2
ADJ3 7
10 OUT2
FB1 8
9 ADJ2
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ_JA = 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3668EMSE#PBF
LT3668EMSE#TRPBF 3668
16-Lead Plastic MSOP
–40°C to 125°C
LT3668IMSE#PBF
LT3668IMSE#TRPBF
3668
16-Lead Plastic MSOP
–40°C to 125°C
LT3668HMSE#PBF
LT3668HMSE#TRPBF 3668
16-Lead Plastic MSOP
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is 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/
3668fa
2
For more information www.linear.com/LT3668