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LTC3577-3_15 PDF预览

LTC3577-3_15

更新时间： 2024-02-15 05:35:47
品牌 Logo 应用领域
凌特 - Linear 集成电源管理电路
页数 文件大小 规格书
52页 567K
描述
Highly Integrated Portable Product PMIC

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中文翻译

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LTC3577-3_15 数据手册

 浏览型号LTC3577-3_15的Datasheet PDF文件第2页浏览型号LTC3577-3_15的Datasheet PDF文件第3页浏览型号LTC3577-3_15的Datasheet PDF文件第4页浏览型号LTC3577-3_15的Datasheet PDF文件第5页浏览型号LTC3577-3_15的Datasheet PDF文件第6页浏览型号LTC3577-3_15的Datasheet PDF文件第7页 
LTC3577-3/LTC3577-4  
Highly Integrated  
Portable Product PMIC  
FEATURES  
DESCRIPTION  
The LTC®3577-3/LTC3577-4 are highly integrated power  
managementICsforsinglecellLi-Ion/Polymerbatteryap-  
plications.ItincludesaPowerPathmanagerwithautomatic  
load prioritization, a battery charger, an ideal diode, input  
overvoltage protection and numerous other internal pro-  
tection features. The LTC3577-3/LTC3577-4 are designed  
toaccuratelychargefromcurrentlimitedsuppliessuchas  
USB by automatically reducing charge current such that  
the sum of the load current and the charge current does  
notexceedtheprogrammedinputcurrentlimit(100mAor  
500mAmodes).TheLTC3577-3/LTC3577-4reducethebat-  
teryvoltageatelevatedtemperaturestoimprovesafetyand  
reliability. The three step-down switching regulators and  
two LDOs provide a wide range of available supplies. The  
LTC3577-3/LTC3577-4 also include a pushbutton input to  
controlpowersequencingandsystemreset. Theonboard  
LED backlight boost circuitry can drive up to 10 series  
LEDs and includes versatile digital dimming via the I2C  
input.TheLTC3577-3/LTC3577-4aredesignedtosupport  
the SiRF Atlas IV processor and has pushbutton timing  
and sequencing different from other LTC3577 versions.  
The LTC3577-3/LTC3577-4 are available in a low profile  
4mm × 7mm × 0.75mm 44-pin QFN package.  
n
Full Featured Li-Ion/Polymer Charger/PowerPath™  
Controller with Instant-On Operation  
n
Triple Adjustable High Efficiency Step-Down  
Switching Regulators (800mA, 500mA, 500mA I  
)
OUT  
2
n
n
I C Adjustable SW Slew Rates for EMI Reduction  
High Temperature Battery Voltage Reduction  
Improves Safety and Reliability  
n
n
Overvoltage Protection Controller for USB (V )/Wall  
BUS  
Inputs Provide Protection to 30V  
Integrated 40V Series LED Back Light Driver with 60dB  
2
Brightness Control and Gradation via I C  
n
n
1.5A Maximum Charge Current with Thermal Limiting  
Battery Float Voltage: 4.2V (LTC3577-3)  
4.1V (LTC3577-4)  
n
n
n
Pushbutton ON/OFF Control with System Reset  
Dual 150mA Current Limited LDOs  
Start-Up Timing Compatible with SiRF Atlas IV  
Processor  
n
Small 4mm × 7mm 44-Pin QFN Package  
APPLICATIONS  
n
PNDs, DMB/DVB-H, Digital/Satellite Radio,  
Media Players  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents including 6522118, 6700364,  
7511390, 5481178, 6580258. Other patents pending.  
n
Portable Industrial/Medical Products  
Other USB-Based Handheld Products  
n
TYPICAL APPLICATION  
5V  
LED Driver Efficiency (10 LEDs)  
ADAPTER  
OPTIONAL  
90  
100mA/500mA  
1000mA  
USB  
80  
70  
60  
V
OUT  
0V  
OVERVOLTAGE  
PROTECTION  
CC/CV  
MAX PWM  
CONSTANT  
CURRENT  
CHARGER  
+
SINGLE CELL  
Li-Ion  
50  
40  
30  
20  
10  
0
CHARGE  
NTC  
LTC3577-3/LTC3577-4  
2
0.8V to 3.6V/150mA  
0.8V to 3.6V/150mA  
DUAL LDO  
REGULATORS  
2
I C PORT  
LED BACKLIGHT WITH DIGITALLY  
CONTROLLED DIMMING  
4 TO 10 LED  
BOOST  
TRIPLE HIGH  
0.8V to 3.6V/800mA  
0.8V to 3.6V/500mA  
0.8V to 3.6V/500mA  
EFFICIENCY  
PUSHBUTTON  
CONTROL  
1000  
100  
10  
1
0.1  
0.01  
PB  
STEP-DOWN  
LED CURRENT (mA)  
SWITCHING  
REGULATORS  
357734 TA01b  
357734 TA01a  
357734fb  
1
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中文翻译

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