特点

• Programmable Output Voltage Tracking
• Sense Resistor Optional
• Spread Spectrum Modulation for Low Noise
• Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response
• Wide VIN Range: 2.75V to 9.8V
• Wide VOUT Range: 0.6V to VIN
• 0.6V ±1.5% Reference
• Low Dropout Operation: 100% Duty Cycle
• True PLL for Frequency Locking or Adjustment (Frequency Range: 250kHz to 750kHz)
• Selectable Burst Mode®/Pulse Skipping/Forced Continuous Operation
• Auxiliary Winding Regulation
• Internal Soft-Start Circuitry
• Power Good Output Voltage Monitor
• Output Overvoltage Protection
• Micropower Shutdown: IQ = 9µA
• Tiny Thermally Enhanced Leadless (4mm × 3mm) DFN or 16-lead SSOP Package

典型应用

应用

• One or Two Cell Lithium-Ion Powered Devices
• Notebook and Palmtop Computers, PDAs
• Portable Instruments
• Distributed DC Power Systems

封装信息

数据表

• LTC3808 - No Rsense, Low EMI, Synchronous DC/DC Controller with Output Tracking
• LTC3808 - 具有输出跟踪功能的无检测电阻器 (No Rsense) 型、低 EMI、同步 DC/DC 控制器

设计要点

• DN382 - Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking

可靠性数据

• R421 Reliability Data

LT Journal

• May 2005 - Low EMI, Output Tracking, High Efficiency, and Too Many Other Features to List in a 3mm x 4mm Synchronous Buck Controller

产品新闻发布

• 具有片上扩频调制功能的低 EMI、低噪声 DC/DC 控制器

CAD 符号

• LTC3808 Footprints and Symbols

相关产品

• LTC3891 - 低 Iq、60V、同步降压型控制器
• LT8705 - 80V VIN 和 VOUT 同步、四开关、降压-升压型 DC/DC 控制器
• LT3080 - 可调 1.1A、单电阻、低压差稳压器
• LTC3809 - No Rsense、低 EMI、同步 DC/DC 控制器
• LT8614 - 具 2.5μA 静态电流的 42V、4A 同步降压型 Silent Switcher
• LTC4364 - 具理想二极管的浪涌抑制器
• LTC4359 - 具反向输入保护功能的理想二极管控制器
• LT4363 - 具电流限制功能的高电压浪涌抑制器
• LTC1624 - High Efficiency SO-8 N-Channel Switching Regulator Controller
• LT3796 - 具双电流检测的 100V 恒定电流和恒定电压控制器