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LTC4057-4.2 - 典型应用图例：
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LTC4057-4.2典型应用图例二
LTC4057-4.2 - 封装图解：
LTC4057-4.2封装图解一
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LINEAR产品 - LTC4057-4.2介绍

LTC4057-4.2 - LTC4057-4.2是Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

LTC4057-4.2是LINEAR凌力尔特公司的一款线性充电器产品，LTC4057-4.2是LTC4057-4.2是Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT，本站介绍了LTC4057-4.2的封装应用图解、特点和优点、功能等，并给出了与LTC4057-4.2相关的LINEAR元器件型号供参考。

LTC4057-4.2 - LTC4057-4.2是Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT - 线性充电器 - 电源管理 - 凌力尔特

LTC4057-4.2 - Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

LTC4057-4.2 - Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT - Linear Technology（凌力尔特）

功能描述

The LTC4057 is a constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its ThinSOT? package and low external component count make the LTC4057 especially well suited for portable applications. Furthermore, the LTC4057 is specifically designed to work within USB power specifications.

No external sense resistor is needed and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback prevents overheating by regulating the charge current to limit the die temperature during high power operation or high ambient temperature conditions. The charge voltage is preset at 4.2V and the charge current can be programmed externally with a single resistor.

When the input supply (wall adapter or USB supply) is removed, the LTC4057 automatically enters a low current state, dropping the battery drain current to less than 2μA. With power applied, the LTC4057 can be put into shutdown mode, reducing the supply current to 25μA.

For the standalone version (on-board charge termination) of the LTC4057, refer to the LTC4054.

特点
  • Programmable Charge Current up to 800mA
  • No External MOSFET, Sense Resistor or Blocking Diode Required
  • Constant-Current/Constant-Voltage Operation with Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*
  • Charges Single Cell Li-Ion Batteries Directly from USB Port
  • Preset 4.2V Charge Voltage with ±1% Accuracy
  • Current Monitor Pin for Charge Termination
  • 25μA Supply Current in Shutdown Mode
  • Low Battery Charge Conditioning (Trickle Charging)
  • Soft-Start Limits Inrush Current
  • Available in a Low Profile (1mm) SOT-23 Package
    • 应用
  • Wireless PDAs
  • Cellular Phones
  • Portable Electronics
    • 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)
    LTC4057ES5-4.2 SOT-23 E $2.14
    LTC4057ES5-4.2#PBF SOT-23 E $2.14
    LTC4057ES5-4.2#TR SOT-23 E $2.14 $1.41
    LTC4057ES5-4.2#TRM SOT-23 E $2.14 $1.43
    LTC4057ES5-4.2#TRMPBF SOT-23 E $2.14 $1.43
    LTC4057ES5-4.2#TRPBF SOT-23 E $2.14 $1.41
    下面可能是您感兴趣的Linear Technology（凌力尔特）元器件
  • LTC4054-4.2 - 采用 ThinSOT 封装并具有热调节功能的独立线性锂离子电池充电器
  • LTC1734 - 采用 ThinSOT 封装的锂离子线性电池充电器
  • LTC4056-4.2 - Linear Li-Ion Charger with Termination in ThinSOT
  • LT1512 - SEPIC 恒定电流 / 恒定电压电池充电器
  • LTC1731-4.1 - Single Cell Lithium-Ion Linear Battery Charger Controllers
  • LT3652 - 用于太阳能电源的功率跟踪 2A 电池充电器
  • LTC4054X-4.2 - 采用 ThinSOT 封装并具有热调节功能的独立线性锂离子电池充电器
  • LTC4002 - 独立型锂离子开关模式电池充电器
  • LT1510 - 恒定电压 / 恒定电流电池充电器
  • LTC4071 - 具低电池电量断接功能的并联锂离子 / 锂聚合物电池充电器系统
    • 下面可能是您感兴趣的凌力尔特公司线性充电器元器件
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