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

目录u3q嘉泰姆

1.产品概述                       2.产品特点u3q嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 u3q嘉泰姆
5.产品封装图                     6.电路原理图                   u3q嘉泰姆
7.功能概述                        8.相关产品u3q嘉泰姆

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一,产品概述(General Description)   u3q嘉泰姆

    The CXSD61036 is high efficiency synchronous,PWM step-downu3q嘉泰姆
DC/DC converters working under an input voltageu3q嘉泰姆
range of 2.5V to 5.5V. This feature makes the CXSD61036 suitableu3q嘉泰姆
for single Li-lon battery-powered applications.100% duty cycleu3q嘉泰姆
capability extends battery life in portable devices, while the quiescentu3q嘉泰姆
current is 200 A with no load, and drops to < 1 A in shutdown.u3q嘉泰姆
       The internal synchronous switch is  desired to increase efficiencyu3q嘉泰姆
without an external Schottky diode. The 1.4 MHz fixed switchingu3q嘉泰姆
frequency allows the using of tiny,low profile inductors and ceramicu3q嘉泰姆
capacitors,which minimized overall solution footprintu3q嘉泰姆
        The CXSD61036 converters are available in the industry standardu3q嘉泰姆
SOT-23-5 power packages (or upon request)u3q嘉泰姆
二.产品特点(Features)u3q嘉泰姆

1.)Up to 95% Efficiencyu3q嘉泰姆
2.)Current mode operation for excellent line and loadu3q嘉泰姆
     transient responseu3q嘉泰姆
3)Low quiescent current: 230 UAu3q嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35u3q嘉泰姆
5)Output voltage 5.5V 0.6Vu3q嘉泰姆
6)Automatic PWM/PFM mode switchingu3q嘉泰姆
7)No Schottky diode requiredu3q嘉泰姆
8)1.4MHz fixed frequency switchingu3q嘉泰姆
9)Short-Circuit protectionu3q嘉泰姆
10)Shutdown quiescent current: < 1 UAu3q嘉泰姆
11)Low profile SOT-23-5 package (lead-freeu3q嘉泰姆
12)packaging is now available)u3q嘉泰姆
三,应用范围 (Applications)u3q嘉泰姆
Digital cameras and MP3u3q嘉泰姆
Palmtop computers / PDAsu3q嘉泰姆
Cellular phonesu3q嘉泰姆
Wireless handsets and DSL modemsu3q嘉泰姆
PC cardsu3q嘉泰姆
Portable media playersu3q嘉泰姆
四.下载产品资料PDF文档u3q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！u3q嘉泰姆

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五,产品封装图 (Package)u3q嘉泰姆

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六.电路原理图u3q嘉泰姆

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七,功能概述u3q嘉泰姆

INDUCTOR SELECTIONu3q嘉泰姆

For most applications, the value of the inductor will fall in the range of 1μH to 4.7μH. Its value isu3q嘉泰姆
chosen based on the desired ripple current. Large value inductors lower ripple current and smallu3q嘉泰姆
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the rippleu3q嘉泰姆

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).u3q嘉泰姆
The DC current rating of the inductor should be at least equal to the maximum load current plusu3q嘉泰姆
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should beu3q嘉泰姆
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistanceu3q嘉泰姆
inductor.u3q嘉泰姆
Different core materials and shapes will change the size/current and price/current relationship ofu3q嘉泰姆
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’tu3q嘉泰姆
radiate much energy, but generally cost more than powdered iron core inductors with similaru3q嘉泰姆
electrical characteristics. The choice of which style inductor to use often depends more on theu3q嘉泰姆

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036u3q嘉泰姆

requires to operate. Table 1 shows some typical surface mount inductors that work well inu3q嘉泰姆
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