LT1082

PRODUCTION

1A High Voltage, Efficiency Switching Voltage Regulator

Viewing:

Overview

  • Wide Input Voltage Range: 3V to 75V
  • High Switch Voltage: 100V
  • Low Quiescent Current: 4.5mA
  • Internal 1A Switch
  • Shutdown Mode Draws Only 120µA Supply Current
  • Isolated Flyback Regulation Mode for Fully Floating Outputs
  • Can Be Externally Synchronized
  • Available in MiniDIP and TO-220 Packages
  • Same Pinout as LT1072

The LT1082 is a monolithic high voltage switching regulator. It can be operated in all standard switching configurations including buck, boost, flyback, forward, and inverting. A 1A high efficiency switch is included on the die along with all oscillator, control, and protection circuitry.

The LT1082 operates with supply voltages from 3V to 75V, switch voltage up to 100V and draws only 4.5mA quiescent current. It can deliver load power up to 20W with no external power devices. By utilizing current-mode switching techniques, it provides excellent AC and DC load and line regulation.

An externally activated shutdown mode reduces total supply current to 120µA typical for standby operation. Totally isolated and regulated outputs can be generated by using the optional “isolated flyback regulation mode” built into the LT1082, without the need for optocouplers or extra transformer windings.

The LT1082 has a unique feature to provide high voltage short-circuit protection. When the FB pin is pulled down to 0.6V and the current out of the pin reaches approximately 350µA, the switching frequency will shift down from 60kHz to 12kHz.

Applications

  • Telecom 5V Supply at 0.7A from -48V
  • 90V Supply at 120mA from 15V
  • All Applications Using LT1072

LT1082
1A High Voltage, Efficiency Switching Voltage Regulator
Negative-to-Positive Telecom 5V Supply Telecom 5V Supply Maximum Output Current vs Input Voltage Product Package 1 Product Package 2 Product Package 3
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet

This is the most up-to-date revision of the Data Sheet.

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

LTspice


Models for the following parts are available in LTspice:

  • LT1082
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

eval board
DC224A

LT1339CSW/LT1082CQ | Buck Controller, 4.5V to 60VIN, 3.3V/5V/7V/ 12VOUT @ 3Amp (thru-hole caps)

Product Details

Demonstration circuit DC224A is a multipurpose, 3 amp synchronous step-down switching regulator using the LT1339. The input voltage range is 4.5V to 60V. The output voltage is jumper selectable for 3.3V, 5V, 7V or 12V. The board includes a small SEPIC converter based on the LT1082 that provides 12V for the LT1339 with any input voltage of 4V to 60V. 

DC224A
LT1339CSW/LT1082CQ | Buck Controller, 4.5V to 60VIN, 3.3V/5V/7V/ 12VOUT @ 3Amp (thru-hole caps)
DC224A - Schematic

Latest Discussions

Recently Viewed