Datasheet
LT3741/LT3741-1
2
37411fe
For more information www.linear.com/LT3741
V
IN
Voltage ................................................................40V
EN/UVLO Voltage ........................................................6V
V
REF
Voltage ................................................................ 3V
CTRL1 and CTRL2 Voltage .......................................... 3V
SENSE
+
Voltage ........................................................40V
SENSE
–
Voltage ........................................................40V
VC Voltage ..................................................................3V
SW Voltage ...............................................................40V
CBOOT ......................................................................46V
(Note 1)
orDer inFormaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3741EUF#PBF LT3741EUF#TRPBF 3741
20-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3741IUF#PBF LT3741IUF#TRPBF 3741
20-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LT3741EFE#PBF LT3741EFE#TRPBF LT3741FE 20-Lead Plastic TSSOP –40°C to 125°C
LT3741IFE#PBF LT3741IFE#TRPBF LT3741FE 20-Lead Plastic TSSOP –40°C to 125°C
LT3741EUF-1#PBF LT3741EUF-1#TRPBF 37411
20-Lead (4mm
×
4mm) Plastic QFN
–40°C to 125°C
LT3741IUF-1#PBF LT3741IUF-1#TRPBF 37411
20-Lead (4mm
×
4mm) Plastic QFN
–40°C to 125°C
LT3741EFE-1#PBF LT3741EFE-1#TRPBF LT3741FE-1 20-Lead Plastic TSSOP –40°C to 125°C
LT3741IFE-1#PBF LT3741IFE-1#TRPBF LT3741FE-1 20-Lead Plastic TSSOP –40°C to 125°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/
absoluTe maximum raTings
20 19 18 17 16
6 7 8
TOP VIEW
21
GND
UF PACKAGE
20-LEAD (4mm
×
4mm) PLASTIC QFN
9 10
5
4
3
2
1
11
12
13
14
15
EN/UVLO
V
REF
CTRL2
GND
CTRL1
HG
GND
SYNC
RT
GND
V
IN
V
CC_INT
LG
CBOOT
SW
SS
FB
SENSE
+
SENSE
–
VC
T
JMAX
= 125°C, q
JA
= 37°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
FE PACKAGE
20-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
V
CC_INT
GND
V
IN
EN/UVLO
V
REF
CTRL2
GND
CTRL1
SS
FB
LG
CBOOT
SW
HG
GND
SYNC
RT
VC
SENSE
–
SENSE
+
21
GND
T
JMAX
= 125°C, q
JA
= 38°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
pin conFiguraTion
RT Voltage...................................................................3V
FB Voltage ...................................................................3V
SS Voltage ..................................................................6V
V
CC_INT
Voltage ...........................................................6V
SYNC Voltage .............................................................. 6V
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP
.............................................................. 300°C