LT3755IUD-1#PBF

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Analog Devices Inc./Maxim Integrated

LED DRIVER 14 SEGMENT 1700UA SUPPLY CURRENT 16-PIN QFN EP TUBE

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LT3755IUD-1#PBF

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Analog Devices Inc./Maxim Integrated

LED DRIVER 14 SEGMENT 1700UA SUPPLY CURRENT 16-PIN QFN EP TUBE

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3755LT3755-1LT3755-2 Series

The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.The LT3755/LT3755-1/LT3755-2 sense output current at the high side of the LED string. High side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. The PWM input provides LED dimming ratios of up to 3000:1, and the CTRL input provides additional analog dimming capability.ApplicationsHigh Power LEDBattery ChargersAccurate Current Limited Voltage Regulators

Technical Specifications

Parameters and characteristics for this part

Specification	LT3755IUD-1#PBF

Dimming	PWM, Analog
Frequency (Max)	1 MHz
Frequency (Min)	100 kHz
Internal Switch(s)	No
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Package / Case	16-WFQFN Exposed Pad
Package Length	3 mm
Package Name	16-QFN
Package Width	3 mm
Topology	Step-Up (Boost), Flyback, Step-Down (Buck), SEPIC
Type	DC DC Controller
Voltage - Supply (Max)	40 V
Voltage - Supply (Min)	4.5 V

LT3755LT3755-1LT3755-2 Series

40VIN, 75VOUTLED Controllers

Part	Type	Frequency (Min)	Frequency (Max)	Number of Outputs	Topology	Package Width	Package Features	Package Name	Package Length	Mounting Type	Internal Switch(s)	Voltage - Supply (Min)	Dimming	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Supply (Max)	Applications	Package / Case	Grade	Qualification
Analog Devices Inc./Maxim Integrated LT3755EMSE#TRPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	125 °C	0 °C	40 V
Analog Devices Inc./Maxim Integrated LT3755JMSE-2#PBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	150 °C	-40 °C	40 V	General Purpose
Analog Devices Inc./Maxim Integrated LT3755IUD#PBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm		16-QFN	3 mm	Surface Mount	No	4.5 V	Analog PWM	125 °C	-40 °C	40 V		16-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3755EUD#TRPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm		16-QFN	3 mm	Surface Mount	No	4.5 V	Analog PWM	125 °C	0 °C	40 V		16-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LT3755IMSE-1#PBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	125 °C	-40 °C	40 V
Analog Devices Inc./Maxim Integrated LT3755JMSE-2#WPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	150 °C	-40 °C	40 V	General Purpose		Automotive	AEC-Q100
Analog Devices Inc./Maxim Integrated LT3755EMSE-1#WPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	125 °C	-40 °C	40 V	General Purpose		Automotive	AEC-Q100
Analog Devices Inc./Maxim Integrated LT3755JMSE-2#WTRPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	150 °C	-40 °C	40 V	General Purpose		Automotive	AEC-Q100
Analog Devices Inc./Maxim Integrated LT3755IMSE#TRPBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm	Exposed Pad	16-MSOP-EP 16-TFSOP	0.118 in	Surface Mount	No	4.5 V	Analog PWM	125 °C	-40 °C	40 V
Analog Devices Inc./Maxim Integrated LT3755EUD#PBF	DC DC Controller	100 kHz	1 MHz	1	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	3 mm		16-QFN	3 mm	Surface Mount	No	4.5 V	Analog PWM	125 °C	0 °C	40 V		16-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R518 Reliability Data

LT3755IUD-1#PBF | Datasheet