1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. LT8616


Alternative Parts

Overview

Features and Benefits

  • Wide Input Voltage Range: 3.4V to 42V
  • 2.5A and 1.5A Buck Regulators with Separate Inputs
  • Fast Minimum Switch On-Time: 35ns
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 6.5μA IQ Regulating 12VIN to 5VOUT and 3.3VOUT
    • Output Ripple < 15mV
  • 180° Out of Phase Switching
    • Adjustable: 200kHz to 3MHz
  • Synchronizable: 250kHz to 3MHz
  • Accurate 1V Enable Pin Thresholds
  • Internal Compensation
  • Output Soft-Start and Tracking
  • TSSOP Package: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin Is Left Floating
  • Thermally Enhanced 28-Lead TSSOP and 3mm × 6mm QFN Packages

Product Details

The LT8616 is a high efficiency, high speed, dual synchronous monolithic step-down switching regulator that consumes only 6.5μA of quiescent current with both channels enabled. Both channels contain all switches and necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while minimizing output ripple. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The enable pins have accurate 1V thresholds and can be used to program undervoltage lockout. Capacitors on the TR/SS pins programs the output voltage ramp rate during startup while the PG pins signal when each output is within 10% of the programmed output voltage. The LT8616 is available in a TSSOP package for high reliability.

Applications

  • Automotive and Industrial Supplies
  • General Purpose Step-Down

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:

LT8616

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:

LT8616

Product Recommendations

LT8616 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
LT8616EFE#PBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616EFE#TRPBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616EUDE#PBF Material Declaration Reliability Data 28-Lead QFN (3mm x 6mm x 0.75mm w/ EP)
LT8616EUDE#TRPBF Material Declaration Reliability Data 28-Lead QFN (3mm x 6mm x 0.75mm w/ EP)
LT8616HFE#PBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616HFE#TRPBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616IFE#PBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616IFE#TRPBF Material Declaration Reliability Data 28-Lead TSSOP w/ EP
LT8616IUDE#PBF Material Declaration Reliability Data 28-Lead QFN (3mm x 6mm x 0.75mm w/ EP)
LT8616IUDE#TRPBF Material Declaration Reliability Data 28-Lead QFN (3mm x 6mm x 0.75mm w/ EP)
Wafer Fabrication Data R570 Reliability Data

PCN-PDN Information

Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

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.

 

Sampling


A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button 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.