1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. LT3995


Features and Benefits

  • Ultralow Quiescent Current: 2.7μA IQ at 12VIN to 3.3VOUT 
  • Low Ripple Burst Mode® Operation Output Ripple < 15mVP-P 
  • Wide Input Range: Operation from 4.3V to 60V 
  • 3A Maximum Output Current 
  • Excellent Start-Up and Dropout Performance 
  • Adjustable Switching Frequency: 200kHz to 2MHz 
  • Synchronizable Between 250kHz to 2MHz 
  • Accurate Programmable Undervoltage Lockout 
  • Low Shutdown Current: IQ = 700nA 
  • Power Good Flag 
  • Soft-Start Capability 
  • Thermal Shutdown Protection 
  • Current Limit Foldback with SS Override 
  • Saturating Switch Design: 85mΩ On Resistance 
  • Small, Thermally Enhanced 16-Lead MSOP Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LT3995 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 60V. Low quiescent current design consumes only 2.7μA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. The LT3995 can supply up to 3A of load current and has current limit foldback to limit power dissipation during short circuit. A low dropout voltage of 500mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank.

An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 85mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. An accurate 1.02V threshold enable pin can be driven directly from a microcontroller or used as a programmable undervoltage lockout. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91.6% of the programmed output voltage. The LT3995 is available in a small 16-lead MSOP package with exposed pad for low thermal resistance.


  • Automotive Battery Regulation
  • Portable Products
  • Industrial 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® 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.


Models for the following parts are available in LTspice:


Product Recommendations

LT3995 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.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
LT3995EMSE#PBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995EMSE#TRPBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995HMSE#PBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995HMSE#TRPBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995IMSE#PBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995IMSE#TRPBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995IMSE#WPBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
LT3995IMSE#WTRPBF Material Declaration Reliability Data 16-Lead MSOP w/ EP
Wafer Fabrication Data R530 Reliability Data

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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.