LTC3405A-1.5 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT

The LTC®3405A-1.5/LTC3405A-1.8 are high efficiency monolithic synchronous buck regulators using a constant frequency, current mode architecture. Supply current during operation is only 20µA and drops to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3405A-1.5/LTC3405A-1.8 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.

Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors.

The LTC3405A-1.5/LTC3405A-1.8 are specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The LTC3405A-1.5/LTC3405A-1.8 are available in a low profile (1mm) ThinSOT package.

For adjustable output voltage, refer to the LTC3405A data sheet.

Protected by U.S. Patents, including 6580258, 5481178

产品特点 Features
  • High Efficiency: Up to 90%
  • Very Low Quiescent Current: Only 20µA During Operation
  • 300mA Output Current at VIN = 3V
  • 2.5V to 5.5V Input Voltage Range
  • 1.5MHz Constant Frequency Operation
  • No Schottky Diode Required
  • Low Dropout Operation: 100% Duty Cycle
  • Stable with Ceramic Capacitors
  • Shutdown Mode Draws <1µA Supply Current
  • ±3% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOTTM Package
参数
LTC3405A-1.5 参数
应用
  • Cellular Telephones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • Digital Still Cameras
  • MP3 Players
  • Portable Instruments
典型应用图
LTC3405A-1.5 典型应用
LTC3405A-1.5 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) *
LTC3405AES6 SOT 6 E $2.37 
LTC3405AES6#PBF SOT 6 E $2.37 
LTC3405AES6#TR SOT 6 E $2.37  $1.67 
LTC3405AES6#TRM SOT 6 E $2.37  $1.69 
LTC3405AES6#TRMPBF SOT 6 E $2.37  $1.69 
LTC3405AES6#TRPBF SOT 6 E $2.37  $1.67 
LTC3405AES6-1.375 SOT 6 E $2.37 
LTC3405AES6-1.375#PBF SOT 6 E $2.37 
LTC3405AES6-1.375#TR SOT 6 E $2.37  $1.67 
LTC3405AES6-1.375#TRM SOT 6 E $2.37  $1.69 
LTC3405AES6-1.375#TRMPBF SOT 6 E $2.37  $1.69 
LTC3405AES6-1.375#TRPBF SOT 6 E $2.37  $1.67 
LTC3405AES6-1.5 SOT 6 E $2.37 
LTC3405AES6-1.5#PBF SOT 6 E $2.37 
LTC3405AES6-1.5#TR SOT 6 E $2.37  $1.67 
LTC3405AES6-1.5#TRM SOT 6 E $2.37  $1.69 
LTC3405AES6-1.5#TRMPBF SOT 6 E $2.37  $1.69 
LTC3405AES6-1.5#TRPBF SOT 6 E $2.37  $1.67 
LTC3405AES6-1.8 SOT 6 E $2.37 
LTC3405AES6-1.8#PBF SOT 6 E $2.37 
LTC3405AES6-1.8#TR SOT 6 E $2.37  $1.67 
LTC3405AES6-1.8#TRM SOT 6 E $2.37  $1.69 
LTC3405AES6-1.8#TRMPBF SOT 6 E $2.37  $1.69 
LTC3405AES6-1.8#TRPBF SOT 6 E $2.37  $1.67 
LTC3405ES6 SOT 6 E $1.96 
LTC3405ES6#PBF SOT 6 E $1.96 
LTC3405ES6#TR SOT 6 E $1.96  $1.67 
LTC3405ES6#TRM SOT 6 E $1.96  $1.69 
LTC3405ES6#TRMPBF SOT 6 E $1.96  $1.69 
LTC3405ES6#TRPBF SOT 6 E $1.96  $1.67 
LTC3405A-1.5 数据手册及相关资料下载
  1. 数据手册(英文) : LTC3405A-1.5/LTC3405A-1.8 - 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT.PDF
  2. 设计要点 (英文) : DN256 - 1.4MHz Switching Regulator Draws Only 10µA Supply Current.PDF
  3. 可靠性数据 : R415 Reliability Data .PDF