LT3465A 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT

The LT®3465/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

产品特点 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)
  • 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
参数
LT3465 参数
应用
  • Cellular Phones
  • PDAs, Handheld Computers
  • Digital Cameras
  • MP3 Players
  • GPS Receivers
典型应用图
LT3465 典型应用
LT3465A 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LT3465AES6 SOT 6 E $2.07
LT3465AES6#PBF SOT 6 E $2.07
LT3465AES6#TR SOT 6 E $2.07 $1.41
LT3465AES6#TRM SOT 6 E $2.07 $1.43
LT3465AES6#TRMPBF SOT 6 E $2.07 $1.43
LT3465AES6#TRPBF SOT 6 E $2.07 $1.41
LT3465ES6 SOT 6 E $2.07
LT3465ES6#PBF SOT 6 E $2.07
LT3465ES6#TR SOT 6 E $2.07 $1.41
LT3465ES6#TRM SOT 6 E $2.07 $1.43
LT3465ES6#TRMPBF SOT 6 E $2.07 $1.43
LT3465ES6#TRPBF SOT 6 E $2.07 $1.41
LT3465A 数据手册及相关资料下载
  1. 数据手册(英文) : LT3465/LT3465A - 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT.PDF
  2. 设计要点 (中文) : DN325 High Efficiency ThinSOT White LED Driver Features Internal Switch and Schottky Diode.PDF
  3. 可靠性数据 : R458 Reliability Data .PDF