CXSD61040B high-efficiency monolithic synchronous buck regulator using a constant frequency current mode architecture

The 2.5V to 5.5V input voltage range makes the CXSD61040B ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems

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 CXSD61040B is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 40uA and drops to<1uA in shutdown. The 2.5V to 5.5V input voltage range makes the CXSD61040B ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications.Switching frequency is internally set at 1.2/2.4MHz, allowing the use of small surface mount inductors and capacitors. Low output voltages are easily supported with the 0.6V feedback reference voltage.

The CXSD61040B is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version. 

   产品特点 返回TOP

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 High Efficiency: Up to 96% 

 2.5V to 5.5V Input Voltage Range 

 1.2/2.4MHz Constant Frequency Operation 

 No Schottky Diode Required 

 Low Dropout Operation:100% Duty Cycle 

 PFM Mode for High Efficiency in Light Load 

 Over temperature Protected 

 Low Quiescent Current: 40μA 

 Short Circuit Protection 

 Over Voltage Protection 

 Inrush Current Limit and Soft Start 

 Available in SOT23-5 Package 

 Max Output Current:2A

   应用范围 返回TOP

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 Cellular and Smart Phones 

 Wireless and DSL Modems 

 PDAs 

 Portable Instruments 

 Digital Still and Video Cameras 

 PC Cards

   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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低压同步DC-DC降压IC
型号	输入耐压	输出电压	输出电流	反馈电压	工作频率	效率	静态工作电流	待机电流	封装
CXSD61036	2.0-6.0V	1.2V/1.8V/3.3V/可调输出	0.7A	0.6V	1.5MHz	96%	20uA		SOT-25
CXSD61037	2.5-6.0V	可调输出	1A	0.6V	1.5MHz	96%	20uA		SOT-25
CXSD61038	2.0-6.0V	可调输出	1.0A	0.6V	1.5M	96%	20uA	1uA	SOT-25
CXSD61038A	2.3-6.0V	可调输出	1.2A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61038B	2.3-6.0V	可调输出	1.5A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61039	2.3-6.0V	可调输出	1.5A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61040	2.0-6.5V	可调输出	2.0A	0.6V	1.5M	96%	40uA	1uA	SOT-26
CXSD61040B	2.6-6.0V	可调输出	2.0A	0.6V	3M	96%	30uA	0.1uA	SOT-25
CXSD61042S	2.3-6.5V	可调输出	2.0A	0.6V	1.5M	96%	40uA	40uA	SOP-8
CXSD61043S	2.3-6.5V	可调输出	3.0A	0.6V	1.5M	95%	40uA	40uA	ESOP-8
CXSD61044D	2.3V-6.5V	可调输出	1.3A	0.6V	1.5M	96%	35uA	35uA	DFN2*2-6
CXSD61040D	2.3V-6.5V	可调输出	2A	0.6V	1.5M	95%	40uA	40uA	DFN3*3-10
CXSD61043	2.5-6.0V	可调输出	3.0A	0.6V	1MHz	95%	40uA	0.1uA	SOT-25