LT3465

• Product introduction

LT3465The 1.2MHz/2.4MHz white LED boost converters have built-in Schottky using ThinSOT

peculiarity

• Inherently Matched LED Current Inherently matched LED current
• Drives Up to Six LEDs from a 3.6V Supply Drive up to six LEDs from a 3.6V supply
• No External Schottky Diode Required No external Schottky diode is required
• 1.2MHz Switching Frequency (LT3465)1.2MHz Switching Frequency (LT3465)
• 2.4MHz Switching Frequency Above AM Broadcast Band (LT3465A)2.4MHz switching frequency higher than AM broadcast band (LT3465A)
• Automatic Soft-Start (LT3465)Automatic Soft Start (LT3465)
• Open LED ProtectionLED open circuit protection
• High Efficiency: 81% (LT3465) 79% (LT3465A) TypicalHigh efficiency: 81% (LT3465) 79% (LT3465A) typical
• Requires Only 0.22µF Output CapacitorOnly 0.22μF of output capacitor is required
• Low Profile (1mm) SOT-23 PackagingLow profile (1 mm) SOT-23 package
• description

  The LT^®3465/LT3465A are step-up DC/DC converters designed to drive up to six LEDs in series from a Li-Ion cell. ^{LT®3465/LT3465A}Step-up DC/DC converter design to drive up to 6 LEDs in series from a lithium-ion battery. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors.The connection of the series LEDs provides the same LED current without the need for ballast resistors. These devices integrate the Schottky diode required externally on competing devices.These devices integrate the needs of external Schottky diodes in similar devices. Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control.Additional features include output voltage limiting when the LED is disconnected, onepin shutdown, and dimming control. The LT3465 has internal soft-start.The LT3465 has internal soft-start.

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

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

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  • Digital CamerasDigital cameras
  • MP3 PlayersMP3 player
  • GPS ReceiversGPS receiver