LDO稳压器限流保护调节器短路电流限制调节器热保护CXLB7373锂电池充电器和低压差恒流恒压线性稳压器组合可编程充电电流700毫安

CXLB7373将恒流/恒压线性单电池锂电池充电器与低压差线性稳压器结合在一起。充电器和线性调节器都可以独立工作。较小的DFN-10包和较低的外部组件数量使CXLB7373非常适合便携式应用。CXLB7373的充电器提供0.7A的充电电流和热调节保护，以优化电路板的设计，使其适合紧凑的尺寸和典型的热条件。当结温达到热调节阈值时，充电器不会关闭，而只是降低充电电流。充电电流可以通过将一个外部电阻从ISET引脚连接到GND来编程。使用外部MOSFET从地上断开电阻，关闭充电器，并将输入电流降低到25毫安。CXLB7373还具有指示充电状态的STAT引脚。CXLB7373的LDO稳压器可提供高达150mA的电流，而压降仅为200mV。4mA的低静态电流使其非常适合电池供电系统。LDO调节器还具有内置的电流限制和热关机保护

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXLB7373 combines a constant-current/constant-voltage linear single cell Li+ battery charger with a low dropout linear regulator. Both charger and linear regulators can work independently. The small DFN-10 package and low external component count make the CXLB7373 ideally suit to portable applications. The charger of CXLB7373 provides 0.7A charge current with thermal regulation protection to optimize the board design for compact size and typical thermal conditions. When the junction temperature reaches the thermal regulation threshold, the charger does not shut down but simply reduces the charge current. The charge current can be programmed by connecting an external resistor from the ISET pin to the GND. Using an external MOSFET to disconnect the resistor from the ground shuts down the charger, and reduces the input current down to 25mA. The CXLB7373 also has the STAT pin to indicate charge status. The LDO regulator of CXLB7373 can deliver up to 150mA current and dropout voltage is only 200mV. The 4mA low quiescent current makes it ideally suit to battery-power systems. The LDO regulator also has built-in current limit and thermal shutdown protection

   产品特点 返回TOP

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· Programmable Charge Current Up to 700mA 

· Charge Status Output Pin 

· Soft-Start Limits Inrush Current 

· 4.2V Charge Termination Voltage with ±1% Accuracy 

· 45mA Pre-charge Current (RSET =2k) 

· Thermal Regulation of Charge Current Simplifies Board Design 

· Charger Enable/Disable Control 

· Ultra Low Regulator Quiescent Current: 4mA 

· Fixed LDO Regulator Output Voltage: 3.3V 

· Low Regulator Dropout Voltage: 200mV@150mA 

· LDO Regulator Current Limit Protection 

· LDO Regulator Short Circuit Current Limit 

· LDO Regulator Thermal Protection 

· Small 3mmx3mm DFN 10-Pin (DFN-10) Package 

· Lead Free and Green Devices Available (RoHS Compliant)

   应用范围 返回TOP

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· PDAs 

· MP3 Players 

· Cell Phones 

· Wireless Appliances

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

 

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Battery Charger > Linear Charger
Part_No	Package	Input Voltage(V)		Quiescent  Current (uA)	Charge  Current  (max)(A)	Battery  Charge  Voltage	VIN  OVP	USB Input	Battery-Load  Switch	Charge State  Output
		min	max
CXLB7370		4.35	6	2000	1000	4.2	Y	Y	Y	Y
CXLB7371	DFN3x3-10	4.35	6	2000	1000	4.2	N	N	N	Y
CXLB7372	SOT-23-5	4.35	6	300	500	4.2	N	N	N	Y
CXLB7373	DFN3x3-10	4.35	6.5	300	500	4.2	N	N	N	Y