CXSU6342系列是一种采用CMOS工艺的低电源电流的PWM升压DC/DC变换器集成电路。采用先进的电路设计，减少了开关过程中产生的高频噪声，输出电压可在0.1V步进2～5.0V之间，最大频率为100kHz（TYP）。一个低纹波、高效率的升压型DC/DC变换器可以由CXSU6342AxxX构成，只需三个外部元件。此外，还有一个CE（芯片启用）功能，可减少关机模式下的功耗，以及一个独立的Vdd管脚功能（独立电源和电压检测管脚），用于反激电路。内部软启动电路可限制启动时输入电源的电流浪涌，提高芯片的可靠性
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目录
7.相关产品
产品概述
CXSU6342 Series is a PWM Step-up DC/DC converter IC with low supply current by CMOS process. High frequency noise that occurs during switching is reduced by using advanced circuit designed, output voltage is programmable in 0.1V steps between 2.0~5.0V and maximum frequency is 100KHz(Typ.). A low ripple, high efficiency step-up DC/DC converter can be constructed of CXSU6342AxxX with only three external components. Also available is a CE(chip enable) function that reduce power dissipation During shut-down mode., and an independent Vdd pin function (separated power supply and voltage detect pins) for fly-back circuits.An inner soft-start circuit limits current surges from input power supply at start up and the reliability of the chip is improved. CXSU6342XxxX is suitable for use with battery-powered instrummets with low noise and low supply current.
产品特点
• Small number of external components: only an inductor, a diode and a capacitor；
• Low ripple and low noise；
• Operating voltage range：0.9V~6.5V；
• Output voltage range：2.0V~5.0V(step 0.1V)；
• Output voltage accuracy：±2.5%；
• Output Current：if Vin=3.0V and Vout=3.3V，then Iout=350mA；
• Low start voltage：≤0.9V(at Iout=1mA)；
• Maximum oscillator frequency： 100KHz(Typ.)；
• High Efficiency：87%(Type)；
• Slow-Start Time ：15mS(Type)；
• PACKAGE：SOT-23，SOT-89
应用范围
•Power source for battery-powered equipment；
• Power source for wireless mouse, wireless keyboard, toys, cameras, camcorders, VCRs, PDAs, and hand-held communication equipment；
• Power source for appliances which require higher cell voltage than that of batteries used in the appliances。
技术规格书（产品PDF)
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产品封装图
电路原理图
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Step-Up DC/DC Converter（升压DC/DC转换器） |
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|
Part |
MODE |
VIN |
VOUT |
Accu |
FOSC |
Eff. |
Application |
Package |
|
PFM |
0.9-6.5V |
3.0-5.0V |
±2.5% |
100K |
85% |
①②③④⑤⑥⑧ |
SOT23-3/SOT23-5/SOT89-3 |
|
|
PWM |
0.9-6.5V |
3.0-5.0V |
±2.5% |
100K |
87% |
①②③④⑤⑥⑧ |
SOT23-3/SOT23-5/SOT89-3 |
|
|
PFM |
0.9-6.5V |
2.7-5.6V |
±2.5% |
180K |
85% |
①②③④⑤⑥⑦ |
SOT23-5/SOT89-3/SOT23-3/TO92 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
300K |
88% |
⑥⑦⑨⑩ |
SOT23-5 |
|
|
PFM |
0.9-6.5V |
1.8-6.0V |
±2% |
150K/ |
85% |
①②③④⑤⑥ |
SOT89-3//SOT23-5/SOT23-3 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
300K |
88% |
⑥⑦⑨⑩ |
SOT23-5 |
|
|
CHARGE |
2.7-5.5V |
5.0V |
±3% |
650K |
81% |
①②④⑦⑧ |
SOT23-6 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-5/ |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-5/SOT89-5 |
|
|
PFM/PWM |
2.5-5.0V |
<12V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM |
2.5-5.0V |
<20V |
±2% |
1M |
88% |
①⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1.2M |
85% |
⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM, Synchronous |
2.9-4.4V |
<5.5V |
±2% |
1M |
94% |
①②④⑦ |
ESOP8 |
|
|
PFM, Synchronous |
0.9-6.5V |
1.8-6.0V |
±2% |
330K |
85% |
①②③④⑤⑥ |
SOT89-3/ SOT23-5/SOT23-3 |
|
|
PFM, Synchronous |
0.9-5.0V |
1.8-5.0V |
± 2% |
400K |
95% |
①②④⑥⑦ |
SOT89/SOT23/SOT23-5/TO92 |
|
|
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 |
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