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LTC4081EDD#PBF

更新时间： 2024-09-23 19:45:07
品牌 Logo 应用领域
凌特 - Linear 光电二极管
页数 文件大小 规格书
24页 453K
描述
LTC4081 - 500mA Li-Ion Charger with NTC Input and 300mA Synchronous Buck; Package: DFN; Pins: 10; Temperature Range: -40°C to 85°C

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LTC4081EDD#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSON,
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.61模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：3.75 V
标称输入电压：5 VJESD-30 代码：S-PDSO-N10
JESD-609代码：e3长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10最高工作温度：85 °C
最低工作温度：最大输出电流：0.7 A
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.85 mm表面贴装：YES
切换器配置：BUCK最大切换频率：2750 kHz
技术：CMOS温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3 mm
Base Number Matches：1

LTC4081EDD#PBF 数据手册

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LTC4081  
500mA Li-Ion Charger  
with NTC Input and  
300mA Synchronous Buck  
DESCRIPTION  
FEATURES  
Battery Charger:  
The LTC®4081 is a complete constant-current/constant-  
voltage linear battery charger for a single-cell 4.2V  
lithium-ion/polymer battery with an integrated 300mA  
synchronous buck converter. A 3mm × 3mm DFN pack-  
age and low external component count make theLTC4081  
especially suitable for portable applications. Furthermore,  
the LTC4081 is specifically designed to work within USB  
power specifications.  
n
Constant-Current/Constant-Voltage Operation  
with Thermal Feedback to Maximize Charge Rate  
without Risk of Overheating  
n
Internal 4.5-Hour Safety Timer for Termination  
n
Charge Current Programmable Up to 500mA with  
5% Accuracy  
n
NTC Thermistor Input for Temperature Qualified  
Charging  
The CHRG pin indicates when charge current has dropped  
to ten percent of its programmed value (C/10). An internal  
4.5-hour timer terminates the charge cycle. The full-  
featured LTC4081 battery charger also includes trickle  
charge, automatic recharge, soft-start (to limit inrush  
current) and an NTC thermistor input used to monitor  
battery temperature.  
n
C/10 Charge Current Detection Output  
n
5µA Supply Current in Shutdown Mode  
Switching Regulator:  
n
High Efficiency Synchronous Buck Converter  
n
300mA Output Current (Constant-Frequency Mode)  
n
2.7V to 4.5V Input Range (Powered from BAT Pin)  
n
0.8V to V Output Range  
BAT  
The LTC4081 integrates a synchronous buck converter  
that is powered from the BAT pin. It has an adjustable  
output voltage and can deliver up to 300mA of load cur-  
rent. The buck converter also features low current high  
efficiency Burst Mode operation that can be selected by  
the MODE pin.  
n
MODE Pin Selects Fixed (2.25MHz) Constant-Frequency  
PWM Mode or Low I (23µA) Burst Mode® Operation  
CC  
n
n
2µA BAT Current in Shutdown Mode  
10-Lead, Low Profile (0.75 mm) 3mm × 3mm DFN Package  
APPLICATIONS  
TheLTC4081isavailableina10-lead,lowprofile(0.75mm)  
3mm × 3mm DFN package.  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners. Protected by U.S. Patents, including  
6522118.  
n
Wireless Headsets  
n
Bluetooth Applications  
n
Portable MP3 Players  
Multifunction Wristwatches  
n
Buck Efficiency vs Load Current  
(VOUT = 1.8V)  
TYPICAL APPLICATION  
Li-Ion Battery Charger with 1.8V Buck Regulator  
100  
80  
60  
40  
20  
0
1000  
100  
10  
510Ω  
EFFICIENCY  
(Burst)  
V
CC  
EFFICIENCY  
(PWM)  
(3.75V  
TO 5.5V)  
V
CHRG  
BAT  
500mA  
CC  
POWER  
LOSS  
4.2V  
+
100k  
Li-Ion/  
(PWM)  
4.7μF  
EN_BUCK  
POLYMER  
BATTERY  
1OμH  
NTC LTC4081  
1
SW  
POWER LOSS  
(Burst)  
4.7μF  
10pF  
1M  
EN_CHRG  
V
V
= 3.8V  
= 1.8V  
BAT  
OUT  
V
0.1  
0.01  
OUT  
(1.8V/300mA)  
FB  
L = 10μH  
C = 4.7μF  
MODE GND PROG  
100k  
T
806k  
806Ω  
4.7μF  
0.01  
0.1  
1
10  
100  
1000  
4081 TA01a  
LOAD CURRENT (mA)  
4081 TA01b  
4081fa  
1
For more information www.linear.com/LTC4081  
1234567...24

中文翻译

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LTC4081EDD#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC4081EDD#TRPBF Linear

完全替代

 LTC4081 - 500mA Li-Ion Charger with NTC Input and 300mA Synchronous Buck; Package: DFN; Pi

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