CXSD61036 high efficiency synchronous PWM step-down DC converters working under an input voltage ran

目录iO8嘉泰姆

1.产品概述                       2.产品特点iO8嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 iO8嘉泰姆
5.产品封装图                     6.电路原理图                   iO8嘉泰姆
7.功能概述                        8.相关产品iO8嘉泰姆

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一,产品概述(General Description)   iO8嘉泰姆

    The CXSD61036 is high efficiency synchronous,PWM step-downiO8嘉泰姆
DC/DC converters working under an input voltageiO8嘉泰姆
range of 2.5V to 5.5V. This feature makes the CXSD61036 suitableiO8嘉泰姆
for single Li-lon battery-powered applications.100% duty cycleiO8嘉泰姆
capability extends battery life in portable devices, while the quiescentiO8嘉泰姆
current is 200 A with no load, and drops to < 1 A in shutdown.iO8嘉泰姆
       The internal synchronous switch is  desired to increase efficiencyiO8嘉泰姆
without an external Schottky diode. The 1.4 MHz fixed switchingiO8嘉泰姆
frequency allows the using of tiny,low profile inductors and ceramiciO8嘉泰姆
capacitors,which minimized overall solution footprintiO8嘉泰姆
        The CXSD61036 converters are available in the industry standardiO8嘉泰姆
SOT-23-5 power packages (or upon request)iO8嘉泰姆
二.产品特点(Features)iO8嘉泰姆

1.)Up to 95% EfficiencyiO8嘉泰姆
2.)Current mode operation for excellent line and loadiO8嘉泰姆
     transient responseiO8嘉泰姆
3)Low quiescent current: 230 UAiO8嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35iO8嘉泰姆
5)Output voltage 5.5V 0.6ViO8嘉泰姆
6)Automatic PWM/PFM mode switchingiO8嘉泰姆
7)No Schottky diode requirediO8嘉泰姆
8)1.4MHz fixed frequency switchingiO8嘉泰姆
9)Short-Circuit protectioniO8嘉泰姆
10)Shutdown quiescent current: < 1 UAiO8嘉泰姆
11)Low profile SOT-23-5 package (lead-freeiO8嘉泰姆
12)packaging is now available)iO8嘉泰姆
三,应用范围 (Applications)iO8嘉泰姆
Digital cameras and MP3iO8嘉泰姆
Palmtop computers / PDAsiO8嘉泰姆
Cellular phonesiO8嘉泰姆
Wireless handsets and DSL modemsiO8嘉泰姆
PC cardsiO8嘉泰姆
Portable media playersiO8嘉泰姆
四.下载产品资料PDF文档iO8嘉泰姆

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！iO8嘉泰姆

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五,产品封装图 (Package)iO8嘉泰姆

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六.电路原理图iO8嘉泰姆

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七,功能概述iO8嘉泰姆

INDUCTOR SELECTIONiO8嘉泰姆

For most applications, the value of the inductor will fall in the range of 1μH to 4.7μH. Its value isiO8嘉泰姆
chosen based on the desired ripple current. Large value inductors lower ripple current and smalliO8嘉泰姆
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the rippleiO8嘉泰姆

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).iO8嘉泰姆
The DC current rating of the inductor should be at least equal to the maximum load current plusiO8嘉泰姆
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should beiO8嘉泰姆
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistanceiO8嘉泰姆
inductor.iO8嘉泰姆
Different core materials and shapes will change the size/current and price/current relationship ofiO8嘉泰姆
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’tiO8嘉泰姆
radiate much energy, but generally cost more than powdered iron core inductors with similariO8嘉泰姆
electrical characteristics. The choice of which style inductor to use often depends more on theiO8嘉泰姆

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036iO8嘉泰姆

requires to operate. Table 1 shows some typical surface mount inductors that work well iniO8嘉泰姆
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