LTC4057ES5-4.2中文资料900mA Linear Li-Ion Battery Chargers数据手册ADI规格书

描述 Description

DESCRIPTION
The LTC®4057 is a constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its ThinSOTTM 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.FEATURES
■ 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

APPLICATION
■ Wireless PDAs
■ Cellular Phones
■ Portable Electronics

特性 Features

■ 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

APPLICATION
■ Wireless PDAs
■ Cellular Phones
■ Portable Electronics 

简介

LTC4057ES5-4.2属于集成电路（IC）的电池充电器。由制造生产的LTC4057ES5-4.2电池充电器电池充电器 PMIC（电源管理集成电路）是元器件级产品系列，用于在电子设备中实现电池充电控制和充电管理功能。这些器件主要根据电池化学及其设计用于的电池数量来分类，可提供电化学电池和超级电容器安全充电所必需的电流或电压调节和监视功能。