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LTC1771 - 典型应用图例：
LTC1771典型应用图例一
LTC1771典型应用图例二
LTC1771 - 封装图解：
LTC1771封装图解一
LTC1771封装图解二
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LINEAR产品 - LTC1771介绍

LTC1771 - LTC1771是10μA Quiescent Current High Efficiency Step-Down DC/DC Controller

LTC1771是LINEAR凌力尔特公司的一款微功率降压产品，LTC1771是LTC1771是10μA Quiescent Current High Efficiency Step-Down DC/DC Controller，本站介绍了LTC1771的封装应用图解、特点和优点、功能等，并给出了与LTC1771相关的LINEAR元器件型号供参考。

LTC1771 - LTC1771是10μA Quiescent Current High Efficiency Step-Down DC/DC Controller - 微功率降压 - 电源管理 - 凌力尔特

LTC1771 - 10μA Quiescent Current High Efficiency Step-Down DC/DC Controller

LTC1771 - 10μA Quiescent Current High Efficiency Step-Down DC/DC Controller - Linear Technology（凌力尔特）

功能描述
The LTC1771 is a high efficiency current mode step-down DC/DC controller that draws as little as 10µA DC supply current to regulate the output at no load while maintaining high efficiency for loads up to several amps. The LTC1771 drives an external P-channel power MOSFET using a current mode, constant off-time architecture. An external sense resistor is used to program the operating current level. Current mode control provides short-circuit protection, excellent transient response and controlled start-up behavior. Burst Mode operation enables the LTC1771 to maintain high efficiency down to extremely low currents. Shutdown mode further reduces the supply current to a mere 2µA. For low noise applications, Burst Mode operation can be easily disabled with the MODE pin. Wide input supply range of 2.8V to 18V (20V maximum) and 100% duty cycle operation for low dropout make the LTC1771 ideal for a wide variety of battery-powered applications where maximizing battery life is important. The LTC1771’s availability in both 8-lead MSOP and SO packages provides for a minimum area solution.
特点
  • Very Low Standby Current: 10µA
  • Available in Space-Saving 8-Lead MSOP Package
  • Output Currents: Up to 5A
  • Wide VIN Range: 2.8V to 20V Operation
  • VOUT Range: 1.23V to 18V
  • High Efficiency: Over 93% Possible
  • ±2% Output Accuracy
  • Very Low Dropout Operation: 100% Duty Cycle
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Defeatable Burst Mode™ Operation
  • Short-Circuit Protected
  • Optional Programmable Soft-Start
  • Micropower Shutdown: IQ = 2µA
    • 应用
  • Cellular Telephones and Wireless Modems
  • 1- to 4-Cell Lithium-Ion-Powered Applications
  • Portable Instruments
  • Battery-Powered Equipment
  • Battery Chargers
  • Scanners
    • 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)
    LTC1771EMS8 MS-8 E $3.25 $2.75
    LTC1771EMS8#PBF MS-8 E $3.25 $2.75
    LTC1771EMS8#TR MS-8 E $2.81
    LTC1771EMS8#TRPBF MS-8 E $2.81
    LTC1771ES8 SO-8 E $3.14 $2.65
    LTC1771ES8#PBF SO-8 E $3.14 $2.65
    LTC1771ES8#TR SO-8 E $2.71
    LTC1771ES8#TRPBF SO-8 E $2.71
    LTC1771IS8 SO-8 I $3.25 $2.75
    LTC1771IS8#PBF SO-8 I $3.25 $2.75
    LTC1771IS8#TR SO-8 I $2.81
    LTC1771IS8#TRPBF SO-8 I $2.81
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  • LT8705 - 80V VIN 和 VOUT 同步、四开关、降压-升压型 DC/DC 控制器
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