CXDC65108线圈控制IC组成一体的超小型降压DC转换器开关频率3MHz 0.52ΩNch开关晶体管的同步整流高速软启动

CXDC65108系列是把线圈和控制IC组成一体的超小型(2.5mm×2.0mm, h=1.0mm)降压DC/DC转换器。只在外部增加两个陶瓷电容即可构成最大负载电流600mA的电源。工作电压在2.0V～6.0V之间。输出电压在0.8～4.0V的范围内能以0.05V的间隔设定。控制IC工作于开关频率3MHz，内置0.42ΩPch驱动晶体管及0.52ΩNch开关晶体管的同步整流方式。能从轻负载到高负载的整个负载范围内实现高速响应,低纹波,高效率。在待机时停止整个电路把消耗电流抑制在1.0μA以下。此外，内置了UVLO(Under Voltage Lock Out)功能，输入电压在1.4V以下时，强制停止内部驱动晶体管工作。CXDC65108B(F,G)系列具有高速软启动功能达到0.25ms(TYP.)的启动时间。CXDC65108B(C,F,G)系列利用CL的放电功能在待机时接通LX-VSS之间的内部开关，通过内部阻抗使负载电容CL的电荷放电。由此放电功能，输出电压能高速地返回VSS电平。

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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      CXDC65108系列是把线圈和控制IC组成一体的超小型(2.5mm×2.0mm, h=1.0mm)降压DC/DC转换器。只在外部增加两个陶瓷电容即可构成最大负载电流600mA的电源。工作电压在2.0V～6.0V之间。输出电压在0.8～4.0V的范围内能以0.05V的间隔设定。控制IC工作于开关频率3MHz，内置0.42ΩPch驱动晶体管及0.52ΩNch开关晶体管的同步整流方式。能从轻负载到高负载的整个负载范围内实现高速响应,低纹波,高效率。在待机时停止整个电路把消耗电流抑制在1.0μA以下。此外，内置了UVLO(Under Voltage Lock Out)功能，输入电压在1.4V以下时，强制停止内部驱动晶体管工作。CXDC65108B(F,G)系列具有高速软启动功能达到0.25ms(TYP.)的启动时间。CXDC65108B(C,F,G)系列利用CL的放电功能在待机时接通LX-VSS之间的内部开关，通过内部阻抗使负载电容CL的电荷放电。由此放电功能，输出电压能高速地返回VSS电平。

The CXDC65107/CXDC65108/CXDC65109 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mm×2.0mm, H=1.0mm). A stable power supply with an output current of 600mA is configured using only two capacitors connected externally. Operating voltage range is from 2.0V to 6.0V(XCL20xG:1.8V～6.0V). Output voltage is internally set in a range from 0.8V to 4.0V in increments of 0.05V. The device is operated by 3.0MHz, and includes 0.42ΩP-channel driver transistor and 0.52Ω N-channel switching transistor. As for operation mode, the CXDC65107 series is PWM control, the CXDC65108 series is automatic PWM/PFM switching control and the CXDC65109 series can be manually switched between the PWM control mode and the automatic PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V or lower. CXDC65107B(G,F)/CXDC65108B(G,F)/CXDC65109B(G,F) series provide short-time turn-on by the soft start function internally set in 0.25 ms (TYP). CXDC65107B(C,G,F) /CXDC65108 B(C,G,F) / CXDC65109B(C,G,F) integrate CL auto discharge function which enables the electric charge stored at the output capacitor CL to be discharged via the internal auto-discharge switch located between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly returns to the VSS level as a result of this function.

   产品特点 返回TOP

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   应用范围 返回TOP

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●Mobile phones, Smart phones 

●Bluetooth Headsets 

●WiMAX PDAs, MIDs, UMPCs 

●Portable game consoles 

●Digital cameras, Camcorders 

●Electronic dictionaries

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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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线圈一体型DC/DC转换器
产品名称	封装	类型	控制	FET	VIN (MIN) (V)	VIN MAX (V)	VOUT MIN V	VOUT MAX  V	IOUTorIIN  mA	FB/VOUT 电压精度 (%)	振荡频率 (MHz)	消耗电流 (μA)
CXDC65102	cl2025 cl2025-02	StepUP	PFM	Nch FET Pch FET	0.9	5.5	2	5	100	±2.0	1.2	6.3
CXDC65103	cl2025-02	升压	PWM	Nch FET Pch FET	0.9	6	2	5.5	500mA@VOUT=5.0V, VBAT=3.3V(TYP.) 350mA@VOUT=3.3V,  VBAT=1.8V(TYP.)	±2.0	3
CXDC65104	cl2025-02	升压	Auto PWM/PFM	Nch FET Pch FET	0.9	6	2	5.5	500mA@VOUT=5.0V, VBAT=3.3V(TYP.) 350mA@VOUT=3.3V,  VBAT=1.8V(TYP.)	±2.0	3
CXDC65105	cl2025 cl2025-02	StepDown	PWM	Nch FET Pch FET	2	6	1	4	400	±2.0	1.2	22
CXDC65106	cl2025 cl2025-02	StepDown	PWM PFM	Nch FET Pch FET	2	6	1	4	400	±2.0	1.2	22
CXDC65107	cl2025 cl2025-02	StepDown	PWM	Nch FET Pch FET	2	6	1	4	600	±2.0	3	46
CXDC65108	cl2025 cl2025-02	StepDown	PWM/PFM	Nch FET Pch FET	2	6	1	4	600	±2.0	3	21
CXDC65109	cl2025 cl2025-02	StepDown	PWM/PFM 外部转换	Nch FET Pch FET	2	6	1	4	600	±2.0	3	21
CXDC65110	usp10b03	StepDown	PWM	Nch FET Pch FET	1.8	6	1	4	400	±2.0	3	46
CXDC65111	usp10b03	StepDown	PWM PFM	Nch FET Pch FET	1.8	6	1	4	400	±2.0	3	21
CXDC65112	cl2025-02	StepDown	PFM	Nch FET Pch FET	2	6	1	4	200	±2.0	3	0.5
CXDC65113	usp11b01	StepDown	PWM	Nch FET Pch FET	2.7	6	1	VIN	2000	±2.0	2.4	53
CXDC65114	usp11b01	StepDown	PWM PFM	Nch FET Pch FET	2.7	6	1	VIN	2000	±2.0	2.4	53
CXDC65115	usp9b01	StepDown	PWM	Nch FET Pch FET	2.7	5.5	1	3.6	1500	±2.0	3	400
CXDC65116	usp9b01	StepDown	PWM PFM	Nch FET Pch FET	2.7	5.5	1	3.6	1500	±2.0	3	25
CXDC65117	cl2025-02	StepDown	PWM	Nch FET Pch FET	2.5	5.5	1	3.6	1000		3	400
CXDC65118	cl2025-02	StepDown	PWM PFM	Nch FET Pch FET	2.5	5.5	1	3.6	1000		3	40
CXDC65119	cl2025-02	StepDown	PWM	Nch FET Pch FET	2.5	5.5	1	3.6	500		1.2	250
CXDC65120	cl2025-02	StepDown	PWM/PFM	Nch FET Pch FET	2.5	5.5	1	3.6	500		1.2	1