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LTC3405A - 典型应用图例：
LTC3405A典型应用图例一
LTC3405A典型应用图例二
LTC3405A - 封装图解：
LTC3405A封装图解一
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LINEAR产品 - LTC3405A介绍

LTC3405A - LTC3405A是1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT?

LTC3405A是LINEAR凌力尔特公司的一款微功率降压产品，LTC3405A是LTC3405A是1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT?，本站介绍了LTC3405A的封装应用图解、特点和优点、功能等，并给出了与LTC3405A相关的LINEAR元器件型号供参考。

LTC3405A - LTC3405A是1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT? - 微功率降压 - 电源管理 - 凌力尔特

LTC3405A - 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT?

LTC3405A - 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT? - Linear Technology（凌力尔特）

功能描述

The LTC3405A is a high efficiency monolithic synchronous buck regulator 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 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 is 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. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3405A is available in a low profile (1mm) ThinSOT package.

For fixed 1.5V and 1.8V output versions, refer to the LTC3405A-1.5/LTC3405A-1.8 data sheet.

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

特点
  • High Efficiency: Up to 96%
  • 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
  • 0.8V Reference Allows Low Output Voltages
  • Shutdown Mode Draws <1μA Supply Current
  • ±2% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOT? Package
    • 应用
  • Cellular Telephones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • Digital Still Cameras
  • MP3 Players
  • Portable Instruments
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LTC3405AES6 SOT-23 E $2.37
    LTC3405AES6#PBF SOT-23 E $2.37
    LTC3405AES6#TR SOT-23 E $2.37 $1.67
    LTC3405AES6#TRM SOT-23 E $2.37 $1.69
    LTC3405AES6#TRMPBF SOT-23 E $2.37 $1.69
    LTC3405AES6#TRPBF SOT-23 E $2.37 $1.67
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  • LT1934 - 采用 ThinSOT 和 DFN 封装的微功率、降压型开关稳压器
  • LTC3103 - 1.8μA 静态电流、15V、300mA 同步降压型 DC/DC 转换器
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  • LT8471 - 具 2A 开关和同步功能的双通道、多拓扑 DC/DC 转换器
  • LTC3410 - 2.25MHz, 300mA Synchronous Step-Down Regulator in SC70
  • LTC3549 - 250mA Low VIN Buck Regulator in 2mm x 3mm DFN
  • LT3470 - 具集成升压和箝位二极管的微功率降压型稳压器
  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
  • LTC3104 - 2.6μA 静态电流、15V、300mA 同步降压型 DC/DC 转换器和 10mA LDO
  • LTC3631 - 高效率、高电压、100mA、同步降压型转换器
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