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

目录5Et嘉泰姆

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

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一,产品概述(General Description)   5Et嘉泰姆

    The CXSD61036 is high efficiency synchronous,PWM step-down5Et嘉泰姆
DC/DC converters working under an input voltage5Et嘉泰姆
range of 2.5V to 5.5V. This feature makes the CXSD61036 suitable5Et嘉泰姆
for single Li-lon battery-powered applications.100% duty cycle5Et嘉泰姆
capability extends battery life in portable devices, while the quiescent5Et嘉泰姆
current is 200 A with no load, and drops to < 1 A in shutdown.5Et嘉泰姆
       The internal synchronous switch is  desired to increase efficiency5Et嘉泰姆
without an external Schottky diode. The 1.4 MHz fixed switching5Et嘉泰姆
frequency allows the using of tiny,low profile inductors and ceramic5Et嘉泰姆
capacitors,which minimized overall solution footprint5Et嘉泰姆
        The CXSD61036 converters are available in the industry standard5Et嘉泰姆
SOT-23-5 power packages (or upon request)5Et嘉泰姆
二.产品特点(Features)5Et嘉泰姆

1.)Up to 95% Efficiency5Et嘉泰姆
2.)Current mode operation for excellent line and load5Et嘉泰姆
     transient response5Et嘉泰姆
3)Low quiescent current: 230 UA5Et嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.355Et嘉泰姆
5)Output voltage 5.5V 0.6V5Et嘉泰姆
6)Automatic PWM/PFM mode switching5Et嘉泰姆
7)No Schottky diode required5Et嘉泰姆
8)1.4MHz fixed frequency switching5Et嘉泰姆
9)Short-Circuit protection5Et嘉泰姆
10)Shutdown quiescent current: < 1 UA5Et嘉泰姆
11)Low profile SOT-23-5 package (lead-free5Et嘉泰姆
12)packaging is now available)5Et嘉泰姆
三,应用范围 (Applications)5Et嘉泰姆
Digital cameras and MP35Et嘉泰姆
Palmtop computers / PDAs5Et嘉泰姆
Cellular phones5Et嘉泰姆
Wireless handsets and DSL modems5Et嘉泰姆
PC cards5Et嘉泰姆
Portable media players5Et嘉泰姆
四.下载产品资料PDF文档5Et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！5Et嘉泰姆

 5Et嘉泰姆

五,产品封装图 (Package)5Et嘉泰姆

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六.电路原理图5Et嘉泰姆

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七,功能概述5Et嘉泰姆

INDUCTOR SELECTION5Et嘉泰姆

For most applications, the value of the inductor will fall in the range of 1μH to 4.7μH. Its value is5Et嘉泰姆
chosen based on the desired ripple current. Large value inductors lower ripple current and small5Et嘉泰姆
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the ripple5Et嘉泰姆

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).5Et嘉泰姆
The DC current rating of the inductor should be at least equal to the maximum load current plus5Et嘉泰姆
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should be5Et嘉泰姆
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistance5Et嘉泰姆
inductor.5Et嘉泰姆
Different core materials and shapes will change the size/current and price/current relationship of5Et嘉泰姆
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’t5Et嘉泰姆
radiate much energy, but generally cost more than powdered iron core inductors with similar5Et嘉泰姆
electrical characteristics. The choice of which style inductor to use often depends more on the5Et嘉泰姆

price vs size requirements and any radiated field/EMI requirements than on what the CXSD610365Et嘉泰姆

requires to operate. Table 1 shows some typical surface mount inductors that work well in5Et嘉泰姆
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