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LTC3443 - 典型应用图例：
LTC3443典型应用图例一
LTC3443典型应用图例二
LTC3443 - 封装图解：
LTC3443封装图解一
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LINEAR产品 - LTC3443介绍

LTC3443 - LTC3443是High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

LTC3443是LINEAR凌力尔特公司的一款内部开关电源降压-升压产品，LTC3443是LTC3443是High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter，本站介绍了LTC3443的封装应用图解、特点和优点、功能等，并给出了与LTC3443相关的LINEAR元器件型号供参考。

LTC3443 - LTC3443是High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter - 内部开关电源降压-升压 - 电源管理 - 凌力尔特

LTC3443 - High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

LTC3443 - High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter - Linear Technology（凌力尔特）

功能描述

The LTC3443 is a high efficiency, fixed frequency, buckboost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The part is pin for pin compatible with its predecessor, the LTC3441, with a lower operating frequency (600kHz), and a VC pin clamp circuit during Burst Mode operation. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single Lithium Ion or multicell applications where the output voltage is within the battery voltage range.

The device includes two 0.10Ω N-channel MOSFET switches and two 0.11Ω P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequency is internally set to 600kHz and can be synchronized up to 1.2MHz. Quiescent current is only 28µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/ SYNC pin is driven low or with a clock, then fixed frequency switching is enabled.

Other features include a 1µA shutdown, soft-start control, thermal shutdown and current limit. The LTC3443 is available in a thermally enhanced 12-lead (4mm × 3mm) DFN Package.

特点
  • Regulated Output with Input Above, Below or Equal to the Output
  • Single Inductor, No Schottky Diodes
  • High Efficiency: Up to 96%
  • 28µA Quiescent Current in Burst Mode Operation
  • Up to 1.2A Continuous Output Current from a Single Lithium-Ion
  • True Output Disconnect in Shutdown
  • 2.4V to 5.5V Input Range
  • 2.4V to 5.25V Output Range
  • 600kHz Fixed Frequency Operation
  • Synchronizable Oscillator
  • Selectable Burst Mode or Fixed Frequency Operation
  • <1µA Quiescent Current in Shutdown
  • Small, Thermally Enhanced 12-Lead (4mm × 3mm × 0.8mm) DFN package
    • 应用
  • Handheld Computers
  • Handheld Instruments
  • MP3 Players
  • Digital Cameras
    • 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)
    LTC3443EDE 4x3 DFN-12 E $4.23 $3.55
    LTC3443EDE#PBF 4x3 DFN-12 E $4.23 $3.55
    LTC3443EDE#TR 4x3 DFN-12 E $3.65
    LTC3443EDE#TRPBF 4x3 DFN-12 E $3.65
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  • LTC3115-1 - 40V、2A、同步降压-升压型 DC/DC 转换器
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  • LTC3442 - 具有自动突发模式操作的微功率同步降压-升压 DC/DC 转换器
  • LTC3789 - 高效率、同步、四开关降压-升压型控制器
  • LTC3536 - 1A、低噪声、降压-升压型 DC/DC 转换器
  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
  • LT8705 - 80V VIN 和 VOUT 同步、四开关、降压-升压型 DC/DC 控制器
  • LT1763 - 500mA、低噪声、LDO 微功率稳压器
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