Datasheet
LT3958
2
3958f
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
, EN/UVLO (Note 5) ..............................................80V
SW ............................................................................84V
INTV
CC
.................................................... V
IN
+ 0.3V, 15V
SYNC ..........................................................................8V
VC, SS .........................................................................3V
RT
...............................................................................................
1.5V
SENSE1, SGND .................. Internally Connected to GND
SENSE2 ..................................................................±0.3V
FBX ................................................................. –6V to 6V
Operating Temperature Range
(Note 2) ............................................. –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range ................... –65°C to 125°C
(Note 1)
12 13 14
TOP VIEW
37
SGND
38
SW
UHE PACKAGE
36-LEAD (5mm s 6mm) PLASTIC QFN
15 16 17
36 35 34 33 32 31 30
21
23
24
25
27
28
8
6
4
3
2
1NC
NC
SENSE2
SGND
SENSE1
SW
SW
NC
INTV
CC
V
IN
EN/UVLO
SGND
SGND
SW
SW
NC
NC
SYNC
RT
SS
FBX
VC
GND
GND
GND
GND
GND
GND
20
9
10
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 5°C/W
EXPOSED PAD (PIN 37) IS SGND, MUST BE SOLDERED TO SGND PLANE
EXPOSED PAD (PIN 38) IS SW, MUST BE SOLDERED TO SW PLANE
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3958EUHE#PBF LT3958EUHE#TRPBF 3958
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3958IUHE#PBF LT3958IUHE#TRPBF 3958
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
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/