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LTC3557EUF-1#PBF PDF预览

LTC3557EUF-1#PBF

更新时间： 2024-02-06 15:05:18
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 314K
描述
LTC3557/LTC3557-1 - USB Power Manager with Li-Ion Charger and Three Step-Down Regulators; Package: QFN; Pins: 28; Temperature Range: -40°C to 85°C

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LTC3557EUF-1#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC28,.16SQ,16
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.69可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：S-PQCC-N28
JESD-609代码：e3长度：4 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：28
最高工作温度：85 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC28,.16SQ,16封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：5 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Power Management Circuits
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.35 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：CMOS温度等级：COMMERCIAL EXTENDED
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.4 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：4 mm
Base Number Matches：1

LTC3557EUF-1#PBF 数据手册

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LTC3557/LTC3557-1  
USB Power Manager with  
Li-Ion Charger and Three  
Step-Down Regulators  
FEATURES  
DESCRIPTION  
The LTC®3557/LTC3557-1 is a highly integrated power  
management and battery charger IC for single cell Li-Ion/  
Polymer battery applications. It includes a PowerPathTM  
manager with automatic load prioritization, a battery  
charger, an ideal diode and numerous internal protection  
features. Designed specifically for USB applications, the  
LTC3557/LTC3557-1 power manager automatically limits  
input current to a maximum of either 100mA or 500mA  
for USB applications or 1A for wall adapter powered  
applications. Battery charge current is automatically  
reduced such that the sum of the load current and the  
charge current does not exceed the programmed input  
current limit. The LTC3557/LTC3557-1 also includes three  
adjustable synchronous step-down switching regulators  
and a high voltage buck regulator output controller with  
Bat-Track that allows efficient charging from supplies as  
high as 38V. The LTC3557/LTC3557-1 is available in a low  
profile 4mm × 4mm × 0.75mm 28-pin QFN package.  
■
Seamless Transition Between Input Power Sources:  
Li-Ion Battery, USB, 5V Wall Adapter or High  
Voltage Buck Regulator with Bat-TrackTM  
200mΩ Internal Ideal Diode Plus Optional External  
■
Ideal Diode Controller Provides Low Loss Power  
Path When Input Current is Limited or Unavailable  
■
Triple Adjustable High Efficiency Step-Down  
Switching Regulators (600mA, 400mA, 400mA I  
)
OUT  
Pin Selectable Burst Mode® Operation  
■
■
■
■
Full Featured Li-Ion/Polymer Battery Charger  
1.5A Maximum Charge Current with Thermal Limiting  
Battery Float Voltage:  
4.2V (LTC3557)  
4.1V (LTC3557-1)  
Low Profile 4mm × 4mm 28-Pin QFN Package  
■
APPLICATIONS  
■
HDD-Based MP3 Players  
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology  
Corporation. Bat-Track and PowerPath are trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
■
PDA, PMP, PND/GPS  
■
USB-Based Handheld Products  
Protected by U.S. Patents, including 6522118, 6700364. Other patents pending.  
TYPICAL APPLICATION  
Input and Battery Current vs Load Current  
HV SUPPLY  
HIGH VOLTAGE  
BUCK DC/DC  
8V TO 38V  
(TRANSIENTS  
TO 60V)  
600  
R
R
= 2k  
PROG  
CLPROG  
I
= 2k  
IN  
500  
400  
300  
200  
100  
0
100mA/500mA  
1000mA  
USB OR  
I
V
LOAD  
OUT  
5V ADAPTER  
0V  
CC/CV  
CHARGER  
I
BAT  
(CHARGING)  
CHARGE  
+
SINGLE CELL  
Li-Ion  
NTC  
LTC3557/LTC3557-1  
ALWAYS ON LDO  
3.3V/25mA  
I
BAT  
(DISCHARGING)  
400  
500  
WALL = 0V  
100  
0.8V to 3.6V/600mA  
0.8V to 3.6V/400mA  
0.8V to 3.6V/400mA  
–100  
TRIPLE HIGH EFFICIENCY  
STEP-DOWN  
600  
0
200  
300  
(mA)  
RST  
SWITCHING REGULATORS  
I
LOAD  
35571 TA01b  
35571 TA01a  
35571fc  
1
1234567...28

中文翻译

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