1. Products
  2. Power Management
  3. Switching Regulators
  4. Ultralow Noise Regulators
  5. LT8653S


Features and Benefits

  • Silent Switcher®2 Architecture:
    • Ultralow EMI on Any PCB
    • Eliminates PCB Layout Sensitivity
    • Internal Bypass Capacitors Reduce Radiated EMI
    • Optional Spread Spectrum Modulation
  • 2A DC from Each Channel Simultaneously
  • Up to 3A on Either Channel
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2
    • Output Ripple < 10mVP–P
  • Optional External VC Pin: Fast Transient Response
  • Forced Continuous Mode
  • High Efficiency at High Frequency
  • 94.1% Efficiency at 1A, 5VOUT from 12VIN at 2MHz
  • Pin-Selectable Fixed Output Voltages: 5V, 3.3V, 1.8V
  • Fast Minimum Switch-On Time: 30ns
  • Wide Input Voltage Range: 3.0V to 42V
  • Adjustable and Synchronizable: 300kHz to 3MHz
  • Fixed Output Pin Strap Options
  • Internal 2MHz fSW with Fast Internal Compensation
  • Small 4mm × 3mm 20-Pin LQFN Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LT8653S is a dual step-down regulator that delivers up to 2A of continuous current from both channels and supports loads up to 3A from each channel. The LT8653S features the second generation Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes integration of bypass capacitors to optimize high frequency current loops and make it easy to achieve advertised EMI performance by eliminating layout sensitivity.

The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small solution size with wide control loop bandwidth for fast transient response. Burst Mode operation enables ultralow standby current consumption or forced continuous mode can be used to control frequency harmonics across the entire output load range. The LT8653S is a full featured, customizable voltage regulator, but also has several pin strap options to select internal 2MHz switching frequency, internal compensation and internal feedback resistor divider options to create a simple, compact two output voltage regulator with only five external components.


  • General Purpose Step-Down
  • Automotive and Industrial Supplies

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

Documentation & Resources

  • View All (11)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Webcasts (2)
  • Books & eBooks (1)
  • Solutions Bulletins & Brochures (1)
  • Design Notes (1)
  • Technical Articles (3)
  • Tools & Simulations


    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.


    Models for the following parts are available in LTspice:



    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.


    Design tools for the following parts are available in LTpowerCAD:


    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LT8653SEV#PBF Material Declaration Reliability Data 20-Lead LQFN (4mm x 3mm x 0.94mm w/ EP)
    LT8653SEV#WPBF Material Declaration Reliability Data 20-Lead LQFN (4mm x 3mm x 0.94mm w/ EP)
    LT8653SIV#PBF Material Declaration Reliability Data 20-Lead LQFN (4mm x 3mm x 0.94mm w/ EP)
    LT8653SIV#WPBF Material Declaration Reliability Data 20-Lead LQFN (4mm x 3mm x 0.94mm w/ EP)
    Wafer Fabrication Data R570 Reliability Data

    Sample & Buy

    Ordering FAQs

    See our Ordering FAQs for answers to questions about online orders, payment options and more.


    Buy Now Pricing

    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.


    List Pricing

    (*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


    Lead Times

    Please see the latest communication from our CCO regarding lead times.



    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

    Price Table Help


    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    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.