LTC4057ES5-4.2#TRM

更新时间： 2024-11-22 13:09:51

品牌	Logo	应用领域
凌特 - Linear		电池光电二极管
页数	文件大小	规格书
12页	145K
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LTC4057-4.2

Linear Li-Ion Battery

Charger with Thermal

Regulation in ThinSOT

FEATURES

DESCRIPTIO

■

Programmable Charge Current up to 800mA

The LTC^®4057 is a constant-current/constant-voltage lin-

ear charger for single-cell lithium-ion batteries. Its

ThinSOT^TMpackage 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 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

Noexternalsenseresistorisneededandnoblockingdiode

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.

Thechargevoltageispresetat4.2Vandthechargecurrent

can be programmed externally with a single resistor.

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

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 shut-

down mode, reducing the supply current to 25µA.

APPLICATIO S

■

Wireless PDAs

Cellular Phones

Portable Electronics

■

For the standalone version (on-board charge termination)

of the LTC4057, refer to the LTC4054.

, LTC and LT are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

*U.S. Patent No. 6522118

TYPICAL APPLICATIO

Charge Curve (750mAh Battery)

700

600

500

400

300

200

100

4.75

4.5

CONSTANT

CURRENT

600mA

CONSTANT

POWER

CONSTANT

VOLTAGE

BAT

4.25

4.0

LTC4057-4.2

1-CELL

4.2V Li-Ion

BATTERY

SHDN PROG

GND

ON OFF

3.75

3.5

1µF

1.65k

= 5V

= 130°C/W

4057 TA01a

3.25

3.0

= 1.65kΩ

PROG

= 25°C

0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25

TIME (HOURS)

4057 TA01b

4057f

12 3 4 5 6 7...12

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与LTC4057ES5-4.2#TRM相关器件

型号	品牌	获取价格	描述	数据表
LTC4057ES5-4.2#TRMPBF	Linear	获取价格	暂无描述
LTC4057ES5-4.2#TRPBF	Linear	获取价格	LTC4057-4.2 - Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT; Package: S
LTC4058	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058-4.2	ADI	获取价格	采用 DFN 封装并具热调节功能的独立线性锂离子电池充电器
LTC4058-4.2_15	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058EDD-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058EDD-4.2#PBF	Linear	获取价格	LTC4058-4.2 - Standalone Linear Li-Ion Battery Chargers with Thermal Regulation in DFN; Pa
LTC4058EDD-4.2#TR	Linear	获取价格	LTC4058-4.2 - Standalone Linear Li-Ion Battery Chargers with Thermal Regulation in DFN; Pa
LTC4058EDD-4.2#TRPBF	Linear	获取价格	暂无描述

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