LT3958 Features/Applications/Data Download

describe

^{The LT®3958} is a wide input voltage range, current mode, DC/DC converter capable of generating either positive or negative output voltages. It can be configured as a boost, flyback, SEPIC or inverting converter. It has an internal low-side N-channel power MOSFET rated for 84V/3.3A and driven from an internal regulated 7.2V supply. Its fixed frequency, current mode architecture enables stable operation over a wide range of supply and output voltages.

The LT3958's operating frequency can be set with an external resistor (programmable from 100kHz to 1MHz) and can be synchronized to an external clock using the SYNC pin. A low minimum operating supply voltage (5V) and a low shutdown quiescent current (<1μA) make the LT3958 ideal for battery-powered systems.

The LT3958 features soft-start and frequency foldback to limit inductor current during startup.

Features

● Wide input voltage range: 5V to 80V

● Single feedback pin can be used to set positive or negative output voltage

● Internal 3.3A/84V power switch

● Current mode control provides excellent transient response

● Operating frequency can be set with one external resistor (100kHz to 1MHz)

● Can be synchronized to an external clock

● Low shutdown current: <1μA

● Internal 7.2V low dropout regulator

● Programmable input undervoltage lockout with hysteresis

● Programmable soft start

● Thermally enhanced QFN (5mm x 6mm) package

Encapsulation

Typical Applications

application

● Car

Telecommunications ​

Industry ​