LT3743 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3743 Datasheet PDF : 28 Pages
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LT3743
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN Voltage.................................................................40V
EN/UVLO Voltage.........................................................6V
VREF Voltage................................................................3V
CTRL_L, CTRL_H, CTRL_T Voltage.............................3V
PWM, CTRL_SEL Voltage............................................6V
SENSE+ Voltage.........................................................40V
SENSE– Voltage.........................................................40V
VCH, VCL Voltage..........................................................3V
SW Voltage................................................................40V
CBOOT.......................................................................46V
RT Voltage...................................................................3V
FB Voltage....................................................................3V
SS Voltage...................................................................6V
SYNC Voltage...............................................................6V
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP............................................................... 300°C
PIN CONFIGURATION
TOP VIEW
28 27 26 25 24 23
GND 1
22 PWMGL
EN/UVLO 2
21 GND
VREF 3
CTRL_T 4
GND 5
20 GND
29
19 PWMGH
GND
18 PWM
CTRL_H 6
17 CTRL_SEL
CTRL_L 7
16 SYNC
SS 8
15 RT
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
VCC_INT 1
GND 2
VIN 3
EN/UVLO 4
VREF 5
CTRL_T 6
GND 7
CTRL_H 8
CTRL_L 9
SS 10
GND 11
FB 12
SENSE+ 13
SENSE– 14
TOP VIEW
29
GND
28 LG
27 GND
26 CBOOT
25 SW
24 HG
23 PWMGL
22 GND
21 PWMGH
20 PWM
19 CTRL_SEL
18 SYNC
17 RT
16 VCH
15 VCL
FE PACKAGE
28-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 30°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION (Note 2)
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3743EUFD#PBF
LT3743EUFD#TRPBF
3743
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3743IUFD#PBF
LT3743IUFD#TRPBF
3743
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3743EFE#PBF
LT3743EFE#TRPBF
LT3743FE
28-Lead Plastic TSSOP
–40°C to 125°C
LT3743IFE#PBF
LT3743IFE#TRPBF
LT3743FE
28-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/
3743fd
2
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