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

目录nF5嘉泰姆

1.产品概述                       2.产品特点nF5嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 nF5嘉泰姆
5.产品封装图                     6.电路原理图                   nF5嘉泰姆
7.功能概述                        8.相关产品nF5嘉泰姆

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一,产品概述(General Description)   nF5嘉泰姆

    The CXSD61036 is high efficiency synchronous,PWM step-downnF5嘉泰姆
DC/DC converters working under an input voltagenF5嘉泰姆
range of 2.5V to 5.5V. This feature makes the CXSD61036 suitablenF5嘉泰姆
for single Li-lon battery-powered applications.100% duty cyclenF5嘉泰姆
capability extends battery life in portable devices, while the quiescentnF5嘉泰姆
current is 200 A with no load, and drops to < 1 A in shutdown.nF5嘉泰姆
       The internal synchronous switch is  desired to increase efficiencynF5嘉泰姆
without an external Schottky diode. The 1.4 MHz fixed switchingnF5嘉泰姆
frequency allows the using of tiny,low profile inductors and ceramicnF5嘉泰姆
capacitors,which minimized overall solution footprintnF5嘉泰姆
        The CXSD61036 converters are available in the industry standardnF5嘉泰姆
SOT-23-5 power packages (or upon request)nF5嘉泰姆
二.产品特点(Features)nF5嘉泰姆

1.)Up to 95% EfficiencynF5嘉泰姆
2.)Current mode operation for excellent line and loadnF5嘉泰姆
     transient responsenF5嘉泰姆
3)Low quiescent current: 230 UAnF5嘉泰姆
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35nF5嘉泰姆
5)Output voltage 5.5V 0.6VnF5嘉泰姆
6)Automatic PWM/PFM mode switchingnF5嘉泰姆
7)No Schottky diode requirednF5嘉泰姆
8)1.4MHz fixed frequency switchingnF5嘉泰姆
9)Short-Circuit protectionnF5嘉泰姆
10)Shutdown quiescent current: < 1 UAnF5嘉泰姆
11)Low profile SOT-23-5 package (lead-freenF5嘉泰姆
12)packaging is now available)nF5嘉泰姆
三,应用范围 (Applications)nF5嘉泰姆
Digital cameras and MP3nF5嘉泰姆
Palmtop computers / PDAsnF5嘉泰姆
Cellular phonesnF5嘉泰姆
Wireless handsets and DSL modemsnF5嘉泰姆
PC cardsnF5嘉泰姆
Portable media playersnF5嘉泰姆
四.下载产品资料PDF文档nF5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！nF5嘉泰姆

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五,产品封装图 (Package)nF5嘉泰姆

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六.电路原理图nF5嘉泰姆

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七,功能概述nF5嘉泰姆

INDUCTOR SELECTIONnF5嘉泰姆

For most applications, the value of the inductor will fall in the range of 1μH to 4.7μH. Its value isnF5嘉泰姆
chosen based on the desired ripple current. Large value inductors lower ripple current and smallnF5嘉泰姆
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the ripplenF5嘉泰姆

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).nF5嘉泰姆
The DC current rating of the inductor should be at least equal to the maximum load current plusnF5嘉泰姆
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should benF5嘉泰姆
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistancenF5嘉泰姆
inductor.nF5嘉泰姆
Different core materials and shapes will change the size/current and price/current relationship ofnF5嘉泰姆
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’tnF5嘉泰姆
radiate much energy, but generally cost more than powdered iron core inductors with similarnF5嘉泰姆
electrical characteristics. The choice of which style inductor to use often depends more on thenF5嘉泰姆

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036nF5嘉泰姆

requires to operate. Table 1 shows some typical surface mount inductors that work well innF5嘉泰姆
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