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LTC3577EUFF-3#PBF PDF预览

LTC3577EUFF-3#PBF

更新时间： 2024-09-24 20:56:59
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 1956K
描述
LTC3577-3 and -4 - Highly Integrated Portable Product PMIC; Package: QFN; Pins: 44; Temperature Range: -40°C to 85°C

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LTC3577EUFF-3#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, LCC44,.16X.28,16
针数：44Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.2可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PQCC-N44
JESD-609代码：e3长度：7 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：44
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：LCC44,.16X.28,16封装形状：RECTANGULAR
封装形式：CHIP CARRIER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
最大供电电流 (Isup)：1000 mA最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：2.7 V标称供电电压 (Vsup)：3.3 V
表面贴装：YES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：0.4 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LTC3577EUFF-3#PBF 数据手册

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LTC3577-3/LTC3577-4  
Highly Integrated  
Portable Product PMIC  
FeaTures  
DescripTion  
The LTC®3577-3/LTC3577-4 are highly integrated power  
management ICs for single cell Li-Ion/Polymer battery ap-  
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  
to accurately charge from current limited supplies such as  
USB by automatically reducing charge current such that  
the sum of the load current and the charge current does  
not exceed the programmed input current limit (100mA  
or 500mA modes). The LTC3577-3/LTC3577-4 reduce the  
battery voltage at elevated temperatures to improve safety  
and 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 control power sequencing and system reset. The  
onboard LED backlight boost circuitry can drive up to 10  
series LEDs and includes versatile digital dimming via the  
I2Cinput.TheLTC3577-3/LTC3577-4aredesignedtosup-  
porttheSiRFAtlasIVprocessorandhaspushbuttontiming  
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 Hot  
Swap 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, 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  
0.001  
0.01  
0.1  
1
10  
100  
PB  
STEP-DOWN  
SWITCHING  
REGULATORS  
LED CURRENT (mA)  
357734 TA01b  
357734 TA01a  
357734fc  
1
For more information www.linear.com/LTC3577-3  
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