LT8582

RECOMMENDED FOR NEW DESIGNS

Dual 3A Boost/Inverting/SEPIC DC/DC Converter with Fault Protection

Data Sheet Product Selection Table
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Overview

  • Dual 42V, 3A Combined Power Switch
  • Master/Slave (1.7A/1.3A) Switch Design
  • Wide Input Range: 2.5V to 22V Operating, 40V Maximum Transient
  • Power Good Pin for Event Based Sequencing
  • Switching Frequency Up to 2.5MHz
  • Each Channel Easily Configurable as a Boost, SEPIC, Inverting or Flyback Converter
  • Low VCESAT Switch: 270mV at 2.75A (Typical)
  • Can be Synchronized to an External Clock
  • Output Short-Circuit Protection
  • High Gain SHDN Pin Accepts Slowly Varying Input Signals
  • 24-Pin 7mm × 4mm DFN Package

The LT8582 is a dual independent channel PWM DC/DC converter with a power good pin and built-in fault protection to help guard against input overvoltage and overtemperature conditions. Each channel consists of a 42V master switch and a 42V slave switch that can be tied together for a total current limit of 3A.

The LT8582 is ideal for many local power supply designs. Each channel can be easily configured in boost, SEPIC, inverting, or flyback configurations. Together, the two channels can produce a 12V and a –12V output with 14.4W of combined output power from a 5V input. In addition, the LT8582’s slave switch allows the part to be configured in high voltage, high power charge pump topologies that are more efficient and require fewer components than traditional circuits.

The LT8582 also features innovative SHDN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function. Additional features such as output short protection, frequency foldback and soft-start are integrated. The LT8582 is available in a 24-pin 7mm × 4mm DFN package.

Applications

  • Local Power Supply
  • Vacuum Fluorescent Display (VFD) Bias Supplies
  • TFT-LCD Bias Supplies
  • Automotive Engine Control Unit (ECU) Power
LT8582
Dual 3A Boost/Inverting/SEPIC DC/DC Converter with Fault Protection
1.5MHz, 5V to ±12V Efficiency and Power Loss (Load Between 12V and –12V Outputs) Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 2

Data Sheet

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

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT8582
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
schematic 1
DC1734A

LT8582IDKD Demo Board I Dual 3A Boost/Inverting/SEPIC DC/DC Converter

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Product Details

Demonstration circuit 1734A features the dual channel LT8582 in boost and inverting regulator configurations. The circuit is designed to convert a 5V to 10V input source to 12V at 900mA and –12V at 590mA. To limit the temperature rise of the chip to 40°C, on the demo board with no air flow, the maximum combined output power is 15W. Additional input bulk capacitance may be needed, subject to source impedance. DC1734A is designed to survive output short circuit events.
DC1734A
LT8582IDKD Demo Board I Dual 3A Boost/Inverting/SEPIC DC/DC Converter
DC1734A - Schematic

Reference Designs

Figure 1. CN0554 Simplified Block Diagram
Figure 1. CN0554 Simplified Block Diagram
EVAL-CN0554-RPIZ
EVAL-CN0554-RPIZ - Top View
EVAL-CN0554-RPIZ - Bottom View
CN0554 Circuits from the lab

±10 V Analog Input and ±15 V Analog Output for Raspberry Pi Platforms

View Detailed Reference Design

Features and Benefits

  • 8-Psuedo differential inputs or 16-Single-ended inputs
  • Selectable Input Voltage range, up to ±13 V
  • 16 Single-ended Outputs
  • Up to ±15 V Outputs
  • All Power Rails Derived from the Raspberry Pi

Part Used

Resources

Design & Integration Tools

Videos

  • lazy blur
    VIDEO · 2023-02-17 01:00
    CN0554: 10V Analog Input and 15V Analog Output for Raspberry Pi
CN0554
±10 V Analog Input and ±15 V Analog Output for Raspberry Pi Platforms
Figure 1. CN0554 Simplified Block Diagram
EVAL-CN0554-RPIZ
EVAL-CN0554-RPIZ - Top View
EVAL-CN0554-RPIZ - Bottom View

Latest Discussions

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LT8582 +-16V and +-6V output from 12V input possible?
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