CMOS升压开关稳压器由参考电压源振荡电路误差放大器相位补偿电路PWM/PFM开关组成CXSU6344占空比为15%的功率因数调制

CXSU6344系列是一种CMOS升压开关稳压器，主要由参考电压源、振荡电路、误差放大器、相位补偿电路、PWM/PFM开关控制电路组成。本产品采用外接低导通电阻Nch功率MOS，适用于高效率、高输出电流的应用场合。CXSU6344系列将其工作切换到占空比为15%的功率因数调制（PFM）控制电路，并在轻负载下切换到脉宽调制（PWM）/功率因数调制（PFM）开关控制电路，以防止IC工作电流降低效率

                          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

一.产品概述

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    The CXSU6344 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit. With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current. The CXSU6344 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.

二.产品特点

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  Low voltage operation: Start-up is guaranteed from 0.9 V(IOUT =1 mA )

  Duty ratio: Built-in PWM/PFM switching control circuit 15 to 78 % .

  oscillator frequency：300KHz

  External parts: coil, diode, capacitor, and transistor

  Output voltage range: 1.5V ~20 V

  Output voltage accuracy：±2%

  Soft start function: 2 ms.

三.应用范围

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  Mobile phones (PDC, GSM, CDMA, IMT200 etc.)

  Bluetooth equipment

  PDA

  Portable communication modem

  Portable games

  Cameras

  Digital cameras

  Cordless phones

  Notebook computers    

四.技术规格书（产品PDF)

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需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

五.产品封装图

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六.电路原理图

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七.相关芯片选择指南  更多同类产品......

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Step-Up   DC/DC Converter（升压DC/DC转换器）
Part	MODE	VIN	VOUT	Accu	FOSC	Eff.	Application	Package
CXSU6341	PFM	0.9-6.5V	3.0-5.0V	±2.5%	100K	85%	①②③④⑤⑥⑧	SOT23-3/SOT23-5/SOT89-3
CXSU6342	PWM	0.9-6.5V	3.0-5.0V	±2.5%	100K	87%	①②③④⑤⑥⑧	SOT23-3/SOT23-5/SOT89-3
CXSU6343	PFM	0.9-6.5V	2.7-5.6V	±2.5%	180K	85%	①②③④⑤⑥⑦	SOT23-5/SOT89-3/SOT23-3/TO92
CXSU6344	PFM/PWM	0.9-6.5V	<20V	±2%	300K	88%	⑥⑦⑨⑩	SOT23-5
CXSU6345	PFM	0.9-6.5V	1.8-6.0V	±2%	150K/	85%	①②③④⑤⑥	SOT89-3//SOT23-5/SOT23-3
CXSU6346	PFM/PWM	0.9-6.5V	<20V	±2%	300K	88%	⑥⑦⑨⑩	SOT23-5
CXSU6347	CHARGE	2.7-5.5V	5.0V	±3%	650K	81%	①②④⑦⑧	SOT23-6
CXSU6348	PFM/PWM	0.9-6.5V	<20V	±2%	1M	85%	⑥⑦⑨⑩	SOT23-5/
CXSU6349	PFM/PWM	0.9-6.5V	<20V	±2%	1M	85%	⑥⑦⑨⑩	SOT23-5/SOT89-5
CXSU6350	PFM/PWM	2.5-5.0V	<12V	±2%	1M	85%	⑥⑦⑨⑩	SOT23-6
CXSU6351	PFM/PWM	2.5-5.0V	<20V	±2%	1M	88%	①⑥⑦⑨⑩	SOT23-6
CXSU6352	PFM/PWM	0.9-6.5V	<20V	±2%	1.2M	85%	⑥⑦⑨⑩	SOT23-6
CXSU6353	PFM/PWM, Synchronous	2.9-4.4V	<5.5V	±2%	1M	94%	①②④⑦	ESOP8
CXSU6354	PFM, Synchronous	0.9-6.5V	1.8-6.0V	±2%	330K	85%	①②③④⑤⑥	SOT89-3/   SOT23-5/SOT23-3
CXSU6355	PFM, Synchronous	0.9-5.0V	1.8-5.0V	± 2%	400K	95%	①②④⑥⑦	SOT89/SOT23/SOT23-5/TO92
CXSU6356	PFM, Synchronous	0.9-6.0V	1.8-6.0V	±2%	140K	81%	①②③④⑤⑥	SOT89/SOT23-3
Applications： ①Battery powered   equipment②Wireless mouse, Wireless keyboard③Toys④Camera, Video   camera⑤VCR⑥PDA⑦LED Lighting⑧Wireless communication equipment⑨MID⑩Audio   equipment