LT3959 Series

Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch

Catalog

Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch

Part	Voltage - Output (Max) [Max]	Output Type	Output Configuration	Supplier Device Package	Package / Case	Frequency - Switching [Max]	Frequency - Switching [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Mounting Type	Voltage - Output (Min/Fixed)	Current - Output	Voltage - Input (Min) [Min]	Function	Number of Outputs
Analog Devices LT3959EFE#TRPBF	40 V	Adjustable	Positive or Negative	38-TSSOP-EP	38-TFSOP	1 MHz	100 kHz	-40 °C	125 ¯C	Boost Cuk SEPIC	Surface Mount	0.8 V	6 A	1.6 V	Step-Up Step-Up/Step-Down	1
Analog Devices LT3959IFE#PBF	40 V	Adjustable	Positive or Negative	38-TSSOP-EP	38-TFSOP	1 MHz	100 kHz	-40 °C	125 ¯C	Boost Cuk SEPIC	Surface Mount	0.8 V	6 A	1.6 V	Step-Up Step-Up/Step-Down	1
Analog Devices LT3959EFE	40 V	Adjustable	Positive or Negative	38-TSSOP-EP	38-TFSOP	1 MHz	100 kHz	-40 °C	125 ¯C	Boost Cuk SEPIC	Surface Mount	0.8 V	6 A	1.6 V	Step-Up Step-Up/Step-Down	1

Catalog

Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch

Key Features

• Wide VINRange: 1.6V (2.5V Start-Up) to 40V

• Positive or Negative Output Voltage Programming with a Single Feedback Pin

• PGOOD Output Voltage Status Report

• Internal 6A/40V Power Switch

• Programmable Soft-Start

• Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor

• Synchronizable to an External Clock

• Low Shutdown Current < 1μA

• INTVCCRegulator Supplied from VINor DRIVE

• Programmable Input Undervoltage Lockout with Hysteresis

• Thermally Enhanced QFN (5mm × 6mm) and TSSOP Packages

Description

The LT3959 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin. It can be configured as a boost, SEPIC or inverting converter.It features an internal low side N-channel MOSFET rated for 6A at 40V and driven from an internal regulated supply provided from VINor DRIVE. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of LT3959 can be set over a 100kHz to 1MHz range with an external resistor, or can be synchronized to an external clock using the SYNC pin.The LT3959 features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. A window comparator on the FBX pin reports via thePGOODpin, providing output voltage status indication.ApplicationsAutomotiveTelecomIndustrial