LT3465A - 2.4MHz 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

LT3465A
LT3465A
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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.

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Packaging

ThinSOT

LT3465A
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3465AES6 SOT 6 E $2.07   View
LT3465AES6#PBF SOT 6 E $2.07   View
LT3465AES6#TR SOT 6 E $2.07 $1.41 View
LT3465AES6#TRM SOT 6 E $2.07 $1.43 View
LT3465AES6#TRMPBF SOT 6 E $2.07 $1.43 View
LT3465AES6#TRPBF SOT 6 E $2.07 $1.41 View
LT3465ES6 SOT 6 E $2.07   View
LT3465ES6#PBF SOT 6 E $2.07   View
LT3465ES6#TR SOT 6 E $2.07 $1.41 View
LT3465ES6#TRM SOT 6 E $2.07 $1.43 View
LT3465ES6#TRMPBF SOT 6 E $2.07 $1.43 View
LT3465ES6#TRPBF SOT 6 E $2.07 $1.41 View
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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.

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Applications

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

LTSpice / SwitcherCAD III is a powerful FREE circuit simulator and schematic capture program, providing macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

  • Step 1. If you do not already have a copy of LTSpice, click here to download and install LTSpice / SwitcherCAD III

  • Step 2. Once LTSpice is installed, click here for a ready to run  demonstration circuit of the LT3465A.

  • Step 3. If LTspice / SwitcherCAD III does not automatically open after clicking the above link, 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 demonstartion circuit by selecting "Open" from the "File" menu.
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