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LTC3554 PDF预览

LTC3554

更新时间： 2024-11-12 14:57:15
品牌 Logo 应用领域
亚德诺 - ADI 电池稳压器
页数 文件大小 规格书
36页 519K
描述
具锂离子电池充电器和两个降压型稳压器的微功率 USB 电源管理器

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中文翻译

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LTC3554 数据手册

 浏览型号LTC3554的Datasheet PDF文件第2页浏览型号LTC3554的Datasheet PDF文件第3页浏览型号LTC3554的Datasheet PDF文件第4页浏览型号LTC3554的Datasheet PDF文件第5页浏览型号LTC3554的Datasheet PDF文件第6页浏览型号LTC3554的Datasheet PDF文件第7页 
LTC3554/LTC3554-1/  
LTC3554-2/LTC3554-3  
Micropower USB Power  
Manager with Li-Ion Charger  
and Two Step-Down Regulators  
DescripTion  
FeaTures  
The LTC®3554 family* are micropower, highly integrated  
powermanagementandbatterychargerICsforsingle-cell  
Li-Ion/Polymer battery applications. They include a  
PowerPath™ manager with automatic load prioritization,  
a battery charger, an ideal diode and numerous internal  
protectionfeatures.DesignedspecificallyforUSBapplica-  
tions, the LTC3554 power managers automatically limit  
input current to a maximum of either 100mA or 500mA.  
Battery charge current is automatically reduced such that  
the sum of the load current and the charge current does  
not exceed the selected input current limit.  
n
10μA Standby Mode Quiescent Current (All Outputs On)  
n
Seamless Transition Between Input Power Sources:  
Li-Ion/Polymer Battery and USB  
240mΩ Internal Ideal Diode  
n
n
Dual High Efficiency Step-Down Switching Regulators  
(200mA I ) with Adjustable Output Voltages  
OUT  
n
n
Pushbutton On/Off Control with System Reset  
Reset Time: 5 sec (LTC3554/LTC3554-1),  
14 sec (LTC3554-2/LTC3554-3)  
n
n
n
n
Full Featured Li-Ion/Polymer Battery Charger  
Programmable Charge Current with Thermal Limiting  
Instant-On Operation with Discharged Battery  
Battery Float Voltage: 4.2V (LTC3554/LTC3554-2/  
LTC3554-3), 4.1V (LTC3554-1)  
The LTC3554 also includes two synchronous step-down  
switching regulators as well as a pushbutton controller.  
With all supplies enabled in standby mode, the quiescent  
current drawn from the battery is only 10μA. The LTC3554  
family are available in a 3mm × 3mm × 0.75mm 20-lead  
QFN package.  
n
3mm × 3mm × 0.75mm 20-Lead QFN Package  
applicaTions  
n
USB-Based Handheld Products  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
and PowerPath, Hot Swap and Bat-Track are trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 6522118, 6700364, 5481178, 6304066, 6570372, 6580258, 7511390.  
n
Portable Li-Ion/Polymer Based Electronic Devices  
n
Fitness Computers  
Low Power Medical Devices  
*See table on page 2 for available options.  
n
Typical applicaTion  
4.35V TO 5.5V  
SYSTEM  
LOAD  
V
V
OUT  
BUS  
USB INPUT  
10µF  
10µF  
100k  
Battery Drain Current  
vs Temperature  
NTC  
CHRG  
LTC3554  
PROG  
BAT  
14  
100k  
T
+
Li-Ion  
V
= 3.8V  
BAT  
1.87k  
BATTERY  
STBY = 3.8V  
12  
10  
8
REGULATORS LOAD = 0mA  
BOTH REGULATORS  
ENABLED  
HPWR  
SUSP  
BVIN  
2.2µF  
4.7µH  
ONE REGULATOR ENABLED  
3.3V  
PWR_ON1  
SW1  
FB1  
6
200mA  
2.05M  
10pF  
10µF  
10µF  
BOTH REGULATORS DISABLED  
4
FSEL  
649k  
2
STBY  
HARD RESET  
PGOOD  
PWR_ON2  
PBSTAT  
ON  
10µH  
10pF  
0
1.2V  
200mA  
–75 –50 –25  
0
25 50 75 100 125  
SW2  
TEMPERATURE (°C)  
332k  
649k  
3554 TA01b  
FB2  
3554 TA01a  
ON/OFF  
3554123ff  
1
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中文翻译

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