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LTC4057ES5-4.2#TR PDF预览

LTC4057ES5-4.2#TR

更新时间： 2024-09-30 21:18:11
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 149K
描述
LTC4057-4.2 - Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C

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LTC4057ES5-4.2#TR 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SOT包装说明：VSSOP,
针数：5Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.17可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G5
JESD-609代码：e0长度：2.9 mm
湿度敏感等级：1信道数量：2
功能数量：1端子数量：5
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：VSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：1 mm最大供电电压 (Vsup)：6.5 V
最小供电电压 (Vsup)：4.25 V标称供电电压 (Vsup)：5 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：0.95 mm
端子位置：DUAL处于峰值回流温度下的最长时间：20
宽度：1.625 mmBase Number Matches：1

LTC4057ES5-4.2#TR 数据手册

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LTC4057-4.2  
Linear Li-Ion Battery  
Charger with Thermal  
Regulation in ThinSOT  
U
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  
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 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.  
U
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  
U
TYPICAL APPLICATIO  
Charge Curve (750mAh Battery)  
700  
600  
500  
400  
300  
200  
100  
0
4.75  
4.5  
CONSTANT  
CURRENT  
V
IN  
5V  
600mA  
CONSTANT  
POWER  
CONSTANT  
VOLTAGE  
3
5
4
1
V
BAT  
CC  
4.25  
4.0  
LTC4057-4.2  
1-CELL  
4.2V Li-Ion  
BATTERY  
+
SHDN PROG  
GND  
ON OFF  
3.75  
3.5  
2
1µF  
1.65k  
V
= 5V  
CC  
JA  
θ
= 130°C/W  
4057 TA01a  
3.25  
3.0  
R
= 1.65kΩ  
PROG  
= 25°C  
T
A
0
0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25  
TIME (HOURS)  
4057 TA01b  
4057f  
1
1234567...12

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