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

目录nEc嘉泰姆

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

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一,产品概述(General Description)   nEc嘉泰姆

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

1.)Up to 95% EfficiencynEc嘉泰姆
2.)Current mode operation for excellent line and loadnEc嘉泰姆
     transient responsenEc嘉泰姆
3)Low quiescent current: 230 UAnEc嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35nEc嘉泰姆
5)Output voltage 5.5V 0.6VnEc嘉泰姆
6)Automatic PWM/PFM mode switchingnEc嘉泰姆
7)No Schottky diode requirednEc嘉泰姆
8)1.4MHz fixed frequency switchingnEc嘉泰姆
9)Short-Circuit protectionnEc嘉泰姆
10)Shutdown quiescent current: < 1 UAnEc嘉泰姆
11)Low profile SOT-23-5 package (lead-freenEc嘉泰姆
12)packaging is now available)nEc嘉泰姆
三,应用范围 (Applications)nEc嘉泰姆
Digital cameras and MP3nEc嘉泰姆
Palmtop computers / PDAsnEc嘉泰姆
Cellular phonesnEc嘉泰姆
Wireless handsets and DSL modemsnEc嘉泰姆
PC cardsnEc嘉泰姆
Portable media playersnEc嘉泰姆
四.下载产品资料PDF文档nEc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！nEc嘉泰姆

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五,产品封装图 (Package)nEc嘉泰姆

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六.电路原理图nEc嘉泰姆

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七,功能概述nEc嘉泰姆

INDUCTOR SELECTIONnEc嘉泰姆

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

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

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036nEc嘉泰姆

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