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

目录efG嘉泰姆

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

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一,产品概述(General Description)   efG嘉泰姆

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

1.)Up to 95% EfficiencyefG嘉泰姆
2.)Current mode operation for excellent line and loadefG嘉泰姆
     transient responseefG嘉泰姆
3)Low quiescent current: 230 UAefG嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35efG嘉泰姆
5)Output voltage 5.5V 0.6VefG嘉泰姆
6)Automatic PWM/PFM mode switchingefG嘉泰姆
7)No Schottky diode requiredefG嘉泰姆
8)1.4MHz fixed frequency switchingefG嘉泰姆
9)Short-Circuit protectionefG嘉泰姆
10)Shutdown quiescent current: < 1 UAefG嘉泰姆
11)Low profile SOT-23-5 package (lead-freeefG嘉泰姆
12)packaging is now available)efG嘉泰姆
三,应用范围 (Applications)efG嘉泰姆
Digital cameras and MP3efG嘉泰姆
Palmtop computers / PDAsefG嘉泰姆
Cellular phonesefG嘉泰姆
Wireless handsets and DSL modemsefG嘉泰姆
PC cardsefG嘉泰姆
Portable media playersefG嘉泰姆
四.下载产品资料PDF文档efG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！efG嘉泰姆

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五,产品封装图 (Package)efG嘉泰姆

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六.电路原理图efG嘉泰姆

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七,功能概述efG嘉泰姆

INDUCTOR SELECTIONefG嘉泰姆

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

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

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036efG嘉泰姆

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