Space & Harsh Environment Extended Temperature Plastic (H & MP) Extended Temperature (H & MP) Switching Regulators
Power Management Switching Regulator Step-Down (Buck) Regulators Multiple Output Buck
 Power Management Switching Regulator Step-Down (Buck) Regulators Internal Power Switch Buck
 Power Management Switching Regulator Step-Down (Buck) Regulators High Input Voltage Buck

LTC4359 - Ideal Diode Controller with Reverse Input Protection

LTC4364 - Surge Stopper with Ideal Diode

LT3992 - Monolithic Dual Tracking 3A Step-Down Switching Regulator

Features

  • Wide Input Range:
    – Operation from 3V to 60V
  • Independent Supply, Shutdown, Soft-Start, UVLO, Programmable Current Limit and Programmable Power Good for Each 3A Regulator
  • Die Temperature Monitor
  • Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2MHz with Synchronized Clock Output
  • Independent Synchronized Switching Frequencies Optimize Component Size
  • Antiphase Switching
  • Outputs Can Be Paralleled
  • Flexible Output Voltage Tracking
  • Low Dropout: 95% Maximum Duty Cycle
  • 5mm × 5mm QFN Package
  • FMEA Compliant 38-Pin Exposed Pad TSSOP Package

Typical Application

LT3992 Typical Application
LT3992 Typical Application

Description

The LT®3992 is a dual current mode PWM step-down DC/DC converter with two internal 4.6A switches. Independent input voltage, shutdown, feedback, soft-start, UVLO current limit and comparator pins for each channel simplify complex power supply tracking and sequencing requirements.

To optimize efficiency and component size, both converters have a programmable maximum current limit and are synchronized to either a common external clock input, or a resistor settable fixed 250kHz to 2MHz internal oscillator. A frequency divider is provided for channel 1 to further optimize component size. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. A clock output is available for synchronizing multiple regulators.

Minimum input to output voltage ratios are improved by allowing the switch to stay on through multiple clock cycles only switching off when the boost capacitor needs recharging. Independent channel operation can be programmed using the SHDN pin. Disabling both converters reduces the total quiescent current to <10μA.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

TSSOP-38

LT3992 Package Drawing
LT3992 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3992EFE#PBF TSSOP 38 E $7.22 $5.05 View
LT3992EFE#TRPBF TSSOP 38 E $5.11 View
LT3992EUH#PBF QFN 38 E $6.64 $4.65 View
LT3992EUH#TRPBF QFN 38 E $4.71 View
LT3992HFE#PBF TSSOP 38 H $8.30 $5.81 View
LT3992HFE#TRPBF TSSOP 38 H $5.87 View
LT3992IFE#PBF TSSOP 38 I $7.94 $5.56 View
LT3992IFE#TRPBF TSSOP 38 I $5.62 View
LT3992IUH#PBF QFN 38 I $7.31 $5.12 View
LT3992IUH#TRPBF QFN 38 I $5.18 View
Buy Now • Request Samples
* 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1537A LT3992EFE Demo Board I Monolithic Dual Tracking 3A Step-Down Switching Regulator Contact Factory
Buy Now
Click here to view our complete list of demo boards

Applications

  • Automotive Supplies
  • Distributed Supply Regulation

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LT3992

Technical Support