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LTC1622 - LTC1622是Low Input Voltage Current Mode Step-Down DC/DC Controller

LTC1622是Linear公司的一款外部开关电源控制器产品,LTC1622是Low Input Voltage Current Mode Step-Down DC/DC Controller,本站介绍了LTC1622的封装应用图解、特点和优点、功能等,并给出了与LTC1622相关的凌力尔特元器件型号供参考。

LTC1622 - Low Input Voltage Current Mode Step-Down DC/DC Controller

LTC1622 - Low Input Voltage Current Mode Step-Down DC/DC Controller - Linear Technology(凌力尔特)

The LTC1622 is a constant frequency current mode step-down DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage feature that shuts the LTC1622 down when the input voltage falls below 2V.

The LTC1622 boasts a ±1.9% output voltage accuracy and consumes only 350μA of quiescent current. For applications where efficiency is a prime consideration and the load current varies from light to heavy, the LTC1622 can be configured for Burst Mode? operation. Burst Mode operation enhances low current efficiency and extends battery run time. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and possible RF interference.

High constant operating frequency of 550kHz allows the use of a small inductor. The device can also be synchronized up to 750kHz for special applications. The high frequency operation and the available 8-lead MSOP package create a high performance solution in an extremely small amount of PCB area.

To further maximize the life of the battery source, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws a mere 15μA.

  • High Efficiency
  • Constant Frequency 550kHz Operation
  • VIN Range: 2V to 10V
  • Multiampere Output Currents
  • OPTI-LOOP? Compensation Minimizes COUT
  • Selectable, Burst Mode Operation
  • Low Dropout Operation: 100% Duty Cycle
  • Synchronizable up to 750kHz
  • Current Mode Operation for Excellent Line and LoadTransient Response
  • Low Quiescent Current: 350μA
  • Shutdown Mode Draws Only 15μA Supply Current
  • ±1.9% Reference Accuracy
  • Available in 8-Lead MSOP
  • 应用
  • 1- or 2-Cell Li-Ion Powered Applications
  • Cellular Telephones
  • Wireless Modems
  • Portable Computers
  • Distributed 3.3V, 2.5V or 1.8V Power Systems
  • Scanners
  • Battery-Powered Equipment
  • 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)
    LTC1622CMS8 MS-8 C $2.35 $2.05
    LTC1622CMS8#PBF MS-8 C $2.35 $2.05
    LTC1622CMS8#TR MS-8 C $2.11
    LTC1622CMS8#TRPBF MS-8 C $2.11
    LTC1622CS8 SO-8 C $2.10 $1.85
    LTC1622CS8#PBF SO-8 C $2.10 $1.85
    LTC1622CS8#TR SO-8 C $1.91
    LTC1622CS8#TRPBF SO-8 C $1.91
    LTC1622IS8 SO-8 I $2.60 $2.20
    LTC1622IS8#PBF SO-8 I $2.60 $2.20
    LTC1622IS8#TR SO-8 I $2.26
    LTC1622IS8#TRPBF SO-8 I $2.26
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