LT3743IUFD#PBF Linear Technology, LT3743IUFD#PBF Datasheet - Page 2

• Manufacturer Part Number: LT3743IUFD#PBF
• Description: IC LED DRVR HP CONST CURR 28QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3743IUFD#PBF

• Topology: High Side, Low Side, PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: General Purpose
• Type - Secondary: RGB
• Frequency: 200kHz ~ 1MHz
• Voltage - Supply: 6 V ~ 36 V
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Operating Temperature: -40°C ~ 125°C
• Internal Switch(s): Yes
• Efficiency: 92%
• Led Driver Application: Lighting
• No. Of Outputs: 1
• Output Current: 20A
• Output Voltage: 40V
• Input Voltage: 6V To 36V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -

ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
LT3743
V
EN/UVLO Voltage ........................................................6V
V
CTRL_L, CTRL_H, CTRL_T Voltage ............................3V
PWM, CTRL_SEL Voltage ...........................................6V
SENSE
SENSE
VCH, VCL Voltage .......................................................3V
SW Voltage ...............................................................40V
ORDER INFORMATION
LEAD FREE FINISH
LT3743EUFD#PBF
LT3743IUFD#PBF
LT3743EFE#PBF
LT3743IFE#PBF
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.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
IN
REF
Voltage ................................................................40V
Voltage ................................................................3V
+
–
Voltage ........................................................40V
Voltage ........................................................40V
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
EN/UVLO
CTRL_H
CTRL_T
CTRL_L
GND
V
GND
REF
SS
28-LEAD (4mm 5mm) PLASTIC QFN
1
2
3
4
5
6
7
8
T
28 27 26 25 24
9 10
JMAX
TAPE AND REEL
LT3743EUFD#TRPBF
LT3743IUFD#TRPBF
LT3743EFE#TRPBF
LT3743IFE#TRPBF
UFD PACKAGE
= 125°C, θ
TOP VIEW
11 12 13
GND
29
JA
= 37°C/W
14
23
22
21
20
19
18
17
16
15
PWMGL
GND
GND
PWMGH
PWM
CTRL_SEL
SYNC
RT
(Note 2)
http://www.linear.com/leadfree/
PART MARKING*
3743
3743
LT3743FE
LT3743FE
http://www.linear.com/tapeandreel/
(Note 1)
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
PACKAGE DESCRIPTION
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
EN/UVLO
CTRL_H
CTRL_T
CTRL_L
V
SENSE
SENSE
CC_INT
V
GND
GND
GND
V
REF
SS
FB
IN
+
–
T
28-LEAD PLASTIC TSSOP
JMAX
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125°C, θ
FE PACKAGE
TOP VIEW
GND
29
JA
= 30°C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LG
GND
CBOOT
SW
HG
PWMGL
GND
PWMGH
PWM
CTRL_SEL
SYNC
RT
VCH
VCL
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
3743fb