LT3465 - 1.2MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT

Features

  • Inherently Matched LED Current
  • Drives Up to Six LEDs from a 3.6V Supply
  • No External Schottky Diode Required
  • 1.2MHz Switching Frequency (LT3465)
  • 2.4MHz Switching Frequency Above AM Broadcast Band (LT3465A)
  • VIN Range: 2.7V to 16V
  • VOUT(MAX) = 30V
  • Automatic Soft-Start (LT3465)
  • Open LED Protection
  • High Efficiency: 81% (LT3465) 79% (LT3465A) Typical
  • Requires Only 0.22µF Output Capacitor
  • Low Profile (1mm) SOT-23 Packaging

Typical Application

LT3465 Typical Application
LT3465 Typical Application

Description

The LT3465/LT3465A are step-up DC/DC converters designed to drive up to six LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. These devices integrate the Schottky diode required externally on competing devices. Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control. The LT3465 has internal soft-start.

The LT3465 switches at 1.2MHz, allowing the use of tiny external components. The faster LT3465A switches at 2.4MHz. Constant frequency switching results in low input noise and a small output capacitor. Just 0.22µF is required for 3-, 4- or 5-LED applications.

The LT3465 and LT3465A are available in low profile (1mm) 6-lead SOT-23 (ThinSOT™) packages.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LT3465AES6#PBF SOT-23 S6 E 05-08-1636 Yes
LT3465AES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT3465AES6#TRPBF SOT-23 S6 E 05-08-1636 Yes
LT3465ES6#PBF SOT-23 S6 E 05-08-1636 Yes
LT3465ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT3465ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes


LT3465 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3465AES6#PBF SOT-23 E $2.07 Yes
LT3465AES6#TRMPBF SOT-23 E $2.07 $1.43 Yes
LT3465AES6#TRPBF SOT-23 E $2.07 $1.41 Yes
LT3465ES6#PBF SOT-23 E $2.07 Yes
LT3465ES6#TRMPBF SOT-23 E $2.07 $1.43 Yes
LT3465ES6#TRPBF SOT-23 E $2.07 $1.41 Yes
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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 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
DC637A LT3465ES6 LT3465AES6 | Single Cell White LED (4) Driver $75.00
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Click here to view our complete list of demo boards

Applications

  • Cellular Phones
  • PDAs, Handheld Computers
  • Digital Cameras
  • MP3 Players
  • GPS Receivers

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

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
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice 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.

Models for the following parts are available in LTspice:
LT3465
LT3465A

Technical Support