Alternative Parts

  • LT8602
    LT8602

    42V Quad Monolithic Synchronous Step-Down Regulator

  • LT8616
    LT8616

    Dual 42V Synchronous Monolithic Step-Down Regulator with 6.5μA Quiescent Current

Overview

Features and Benefits

  • Flexible Power Supply System Providing Three Outputs Over a Wide Input Voltage Range
  • Two High Voltage Synchronous Buck Regulators
    • 3V to 42V Input Voltage Range
    • Output Currents Up to 2.5A and 1.5A
    • High Efficiency Up to 93%
  • One Low Voltage Synchronous Buck Regulator
    • 2.6V to 5.5V Input Voltage Range
    • Output Current Up to 1.8A and 95% Efficiency
  • Resistor Programmable and Synchronizable from 250kHz to 2.2MHz Switching Frequency
  • Low Ripple Burst Mode® Operation
    • 30μA IQ at 12VIN to 3.3VOUT2
    • Output Ripple <15mV
  • Programmable Power-On Reset
  • Power Good Indicators
  • 2-Phase Clock Reduces Input Current Ripple
  • Available in Thermally Enhanced 40-Lead QFN (6mm × 6mm) Package

Product Details

The LT8601 is a triple channel, current mode, monolithic buck switching regulator with a programmable power-on reset. All regulators are synchronized to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. The LT8601 can be configured for micropower Burst Mode or Pulse-Skipping operation at light load. Micropower operation results in quiescent current of 30μA with all three regulators operating as shown in the application below with no load applied.

The high voltage channels are synchronous buck regulators that operate from an input of 3.0V to 42V. The output currents are up to 1.5A (OUT1) and 2.5A (OUT2). The low voltage channel operates from an input of 2.6V to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8601 uses a 2-phase clock with channel 1 operating 180° from channels 2 and 3 to reduce input ripple current on both HV and LV inputs. All channels have cycle-by-cycle current limit, providing protection against shorted outputs. Thermal shutdown provides additional protection.

The LT8601 is available in a 40-lead 6mm × 6mm QFN package.

Applications

  • Automotive Systems
  • Distributed Supply Regulation
  • Industrial Controls and Power Supplies

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice

Models for the following parts are available in LTspice:

LT8601

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTPowerCAD

Design tools for the following parts are available in LTpowerCAD:

LT8601HV
LT8601LV

Product Recommendations

LT8601 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LT8601 Discussions

Re: LT8601 Question
4 week(s) ago in Power By Linear
LT8601 Question
5 week(s) ago in Power By Linear
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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.