1. Products
  2. Power Management
  3. Display Control and Power
  4. LCD/CCD/OLED Bias
  5. LT3513


Features and Benefits

  • 4.5V to 30V Input Voltage Range
  • Four Integrated Switches: 2.2A Buck, 1.5A Boost, 0.25A Boost, 0.25A Inverter (Guaranteed Minimum Current Limit)
  • External NPN LDO Driver
  • Fixed Frequency, Low Noise Outputs
  • Inductor Current Sense for Buck
  • Soft-Start for All Outputs
  • Externally Programmable VON Delay
  • Three Integrated Schottky Diodes
  • PGOOD Pin for AVDD Output Disconnect
  • PanelProtect Circuitry Disables VON Upon Fault
  • Thermally Enhanced 38-Lead 5mm × 7mm QFN Package

Product Details

The LT3513 5-output adjustable switching regulator provides power for large TFT-LCD panels. The 38-pin 5mm × 7mm QFN device can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT-LCD panel. A lower voltage secondary logic supply may also be generated with the addition of an external NPN driven by the internal linear regulator. A step-down regulator provides a low voltage output, VLOGIC, with up to 1.2A of current while capable of operating from a wide input range of 4.5V to 30V. A high power step-up converter, a lower power step-up converter and an inverting converter provide the three independent output voltages: AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage.


  • Automotive TFT-LCD Displays
  • Large TFT-LCD Desktop Monitors
  • Flat Panel Televisions

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

LT3513 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
LT3513EUHF#PBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
LT3513EUHF#TRPBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
LT3513IUHF#PBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
LT3513IUHF#TRPBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
Wafer Fabrication Data R530 Reliability Data

Sample & Buy

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Evaluation Boards

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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.