lt3741 Linear Technology Corporation, lt3741 Datasheet - Page 2

• Manufacturer Part Number: lt3741
• Description: High Power, Constant Current, Constant Voltage, Step-down Controller
• Manufacturer: Linear Technology Corporation

absoluTe maximum raTings
LT3741
V
EN/UVLO Voltage ........................................................6V
V
CTRL1 and CTRL2 Voltage ..........................................3V
SENSE
SENSE
VC Voltage ..................................................................3V
SW Voltage ...............................................................40V
CBOOT ......................................................................46V
pin conFiguraTion
orDer inFormaTion
LEAD FREE FINISH
LT3741EUF#PBF
LT3741IUF#PBF
LT3741EFE#PBF
LT3741IFE#PBF
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:
For more information on tape and reel specifications, go to:

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