LT3479 Series

3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

Catalog

3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

Part	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Number of Outputs	Supplier Device Package	Current - Output	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Output (Max) [Max]	Mounting Type	Package / Case [custom]	Package / Case	Package / Case [custom]	Output Configuration	Function	Voltage - Output (Min/Fixed)	Topology	Frequency - Switching [Min]	Frequency - Switching [Max]
Analog Devices LT3479EFE#TRPBF	24 V	2.5 V	1	16-TSSOP-EP	3 A	70 °C	0 °C	Adjustable	42 V	Surface Mount	0.173 "	16-TSSOP Exposed Pad	4.4 mm	Positive or Negative	Step-Up	1.235 V	Boost	200 kHz	3.5 MHz
Analog Devices LT3479EFE#PBF	24 V	2.5 V	1	16-TSSOP-EP	3 A	70 °C	0 °C	Adjustable	42 V	Surface Mount	0.173 "	16-TSSOP Exposed Pad	4.4 mm	Positive or Negative	Step-Up	1.235 V	Boost	200 kHz	3.5 MHz
Analog Devices LT3479EDE#TRPBF	24 V	2.3 V	1	14-DFN (4x3)	3 A	85 °C	-40 °C	Adjustable	42 V	Surface Mount		14-WFDFN Exposed Pad		Positive or Negative	Step-Up	1.235 V	Boost	200 kHz	3.5 MHz

Catalog

3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

Key Features

• Wide Input Voltage Range: 2.5V to 24V

• 3A, 42V Internal Switch

• High Efficiency Power Conversion: Up to 89%

• Soft-Start

• Frequency Set by External Resistor: 200kHz to 3.5MHz

• Protection Against Input Short Circuits and Hot Plugging

• Low VCESATSwitch: 0.3V at 2.5A (Typical)

• Capable of Positive and Negative Outputs

• Available in Thermally Enhanced 14-Lead (4mm × 3mm) DFN and 16-Lead TSSOP Packages

Description

The LT3479 is a current mode, fixed frequency step-up DC/DC converter with an internal 3A, 42V switch. Efficiencies of up to 89% can be achieved in typical applications. It features a programmable soft-start function to limit inductor current during start-up and inrush current protection to protect the LT3479 during shorts and line transients. Both inputs of the error amplifier are available to the user allowing positive and negative output voltages. Through an external resistor, the user can program the switching frequency from 200kHz to 3.5MHz. The low profile (0.75mm) 14-pin, 4mm × 3mm DFN package provides excellent thermal performance in a small footprint. The LT3479 is also available in a thermally enhanced 16-pin TSSOP package.ApplicationsHigh Power LED DriverDSL ModemsDistributed Power