LT3471EDD#TRPBF

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Analog Devices Inc./Maxim Integrated

DUAL 1.3A, 1.2MHZ BOOST/INVERTER IN 3MM × 3MM DFN

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LT3471EDD#TRPBF

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Analog Devices Inc./Maxim Integrated

DUAL 1.3A, 1.2MHZ BOOST/INVERTER IN 3MM × 3MM DFN

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3471 Series

The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. The low VCESATbipolar switches enable the device to deliver high current outputs in a small footprint. The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost and low profile inductors and capacitors. High inrush current at start-up is eliminated using the programmable soft-start function, where an external RC sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter.The LT3471 switches are rated at 42V, making the device ideal for boost converters up to ±40V as well as SEPIC and flyback designs. Each channel can generate 5V at up to 630mA from a 3.3V supply, or 5V at 510mA from four alkaline cells in a SEPIC design. The device can be configured as two boosts, a boost and inverter or two inverters.The LT3471 is available in a low profile (0.75mm) 10-lead 3mm × 3mm DFN package.ApplicationsOrganic LED Power SupplyDigital CamerasWhite LED Power SupplyCellular PhonesMedical Diagnostic EquipmentLocal ±5V or ±12V SupplyTFT-LCD Bias SupplyxDSL Power Supply

Technical Specifications

Parameters and characteristics for this part

Specification	LT3471EDD#TRPBF

Current - Output	1.3 A
Frequency - Switching	1.2 MHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive and Negative (Dual Rail)
Output Type	Adjustable
Package / Case	10-WFDFN Exposed Pad
Package Length	3 mm
Package Name	10-DFN
Package Width	3 mm
Synchronous Rectifier	No
Topology	Boost, SEPIC, Cuk, Flyback
Voltage - Input (Max)	16 V
Voltage - Input (Min)	2.1 V
Voltage - Output (Max) (Negative)	-40 V
Voltage - Output (Max) (Positive)	40 V
Voltage - Output (Min/Fixed)	1 V

LT3471 Series

Part	Output Type	Operating Temperature (Min)	Operating Temperature (Max)	Frequency - Switching	Number of Outputs	Output Configuration	Package Length	Package Name	Package Width	Voltage - Output (Max) (Negative)	Voltage - Output (Max) (Positive)	Topology	Synchronous Rectifier	Function	Voltage - Output (Min/Fixed)	Voltage - Input (Max)	Package / Case	Voltage - Input (Min)	Current - Output	Mounting Type	Voltage - Output (Min/Fixed)	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LT3471EDD#PBF	Adjustable	-40 °C	85 °C	1.2 MHz	2	Positive and Negative (Dual Rail)	3 mm	10-DFN	3 mm	-40 V	40 V	Boost Cuk Flyback SEPIC	No	Step-Up Step-Up/Step-Down	1 V 1 V	16 V	10-WFDFN Exposed Pad	2.1 V	1.3 A	Surface Mount	Ý1V	40 V
Analog Devices Inc./Maxim Integrated LT3471EDD#TRPBF	Adjustable	-40 °C	85 °C	1.2 MHz	2	Positive and Negative (Dual Rail)	3 mm	10-DFN	3 mm	-40 V	40 V	Boost Cuk Flyback SEPIC	No	Step-Up Step-Up/Step-Down	1 V	16 V	10-WFDFN Exposed Pad	2.1 V	1.3 A	Surface Mount

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

SCP-LT3471-EVALZ - Demo Manual

R390 Reliability Data

LT3471EDD#TRPBF | Datasheet