Overview

Features and Benefits

  • Wide VIN Range: 4.5V to 60V (65V Abs Max)
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 99% • VIN
  • Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
  • No External Bootstrap Diodes Required
  • Low Operating IQ: 29μA (One Channel On)
  • Selectable Gate Drive UVLO Thresholds
  • Out-of-Phase Operation Reduces Required Input Capacitance and Power Supply Induced Noise
  • Phase-Lockable Frequency: 75kHz to 850kHz
  • Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • Selectable Current Limit (LTC3892/LTC3892-2)
  • Very Low Dropout Operation: 99% Duty Cycle
  • Power Good Output Voltage Monitors (LTC3892/LTC3892-2)
  • Low Shutdown IQ: 3.6μA
  • Small 32-Lead 5mm × 5mm QFN Package (LTC3892/LTC3892-2) or TSSOP Package (LTC3892-1)

Product Details

The LTC3892/LTC3892-1/LTC3892-2 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase.

The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes.

A wide 4.5V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Output voltages up to 99% of VIN can be regulated. OPTI-LOOP® compensation allows the transient response and loop stability to be optimized over a wide range of output capacitance and ESR values.

The 29μA no-load quiescent current extends operating run time in battery powered systems.

Applications

  • Automotive and Industrial Power Systems
  • Distributed DC Power Systems
  • High Voltage Battery Operated Systems

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 (4)

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:

LTC3892
LTC3892-1

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:

LTC3892
LTC3892 Parallel
LTC3892-1
ltc3892-1Parallel
LTC3892-2
ltc3892-2Parallel
ltc3892Parallel

Product Recommendations

LTC3892 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

LTC3892 Discussions

Re: LTC3892 overheating
1 week(s) ago in Power By Linear
LTC3892 overheating
1 week(s) ago in Power By Linear
LTC3892 for high power buck
3 week(s) ago in Power By Linear
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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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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.