LTC4057-4.2是Linear公司的一款线性充电器产品，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相关的凌力尔特元器件型号供参考。
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）
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.
| 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 |
