LT8582 - Dual 3A Boost/Inverting/SEPIC DC/DC Converter with Fault Protection


  • 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

Typical Application

LT8582 Typical Application
LT8582 Typical Application


The LT®8582 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.


For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LT8582EDKD#PBF 7x4 DFN-24 DKD E 05-08-1864 RoHS
LT8582EDKD#TRPBF 7x4 DFN-24 DKD E 05-08-1864 RoHS
LT8582IDKD#PBF 7x4 DFN-24 DKD I 05-08-1864 RoHS
LT8582IDKD#TRPBF 7x4 DFN-24 DKD I 05-08-1864 RoHS

LT8582 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LT8582EDKD#PBF 7x4 DFN-24 E $5.36 $3.75 Yes
LT8582EDKD#TRPBF 7x4 DFN-24 E $3.81 Yes
LT8582IDKD#PBF 7x4 DFN-24 I $5.90 $4.13 Yes
LT8582IDKD#TRPBF 7x4 DFN-24 I $4.19 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1734A LT8582IDKD Demo Board I Dual 3A Boost/Inverting/SEPIC DC/DC Converter $225.00
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Click here to view our complete list of demo boards


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