目录sz8嘉泰姆

1.产品概述       2.产品特点     3.应用范围      4.技术规格书下载（产品PDF文档） sz8嘉泰姆
5.产品封装图   6.电路原理图  7.功能概述      8.相关产品sz8嘉泰姆

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一,产品概述(General Description)      sz8嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upsz8嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. Powersz8嘉泰姆
dissipation during operation is only 40μA typical and drops to less thansz8嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034sz8嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagesz8嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atsz8嘉泰姆
light loads, further extend battery life. Switching frequency is internally set at 1.2MHz, design for use of small value surface mount inductor, input andsz8嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.sz8嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectsz8嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.sz8嘉泰姆
二.产品特点(Features)sz8嘉泰姆
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Input Voltage Operating Range: 0.85V to 5Vsz8嘉泰姆
Voltage Output Range: 2.5V to 5.5Vsz8嘉泰姆
Efficiency Up to 94%sz8嘉泰姆
3.3V/100mA Output at 1.0V Inputsz8嘉泰姆
5V/700mA Output at 3.6V Inputsz8嘉泰姆
Low Start-up Voltage: 0.85V Typicalsz8嘉泰姆
1.2MHz Constant Frequency Operationsz8嘉泰姆
Internal Synchronous Rectifiersz8嘉泰姆
EMI Reduction Anti-Ring Control Circuitrysz8嘉泰姆
Low Shutdown Current: < 1.0uAsz8嘉泰姆
Over Current Protectionsz8嘉泰姆
Over Temperature Protectionsz8嘉泰姆
Light Load PFM Mode Operationsz8嘉泰姆
SOT23-6 Packagesz8嘉泰姆
三,应用范围 (Applications)sz8嘉泰姆
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 Li-ion Battery Chargersz8嘉泰姆

 TYPICAL APPLICATIONS
USB Audiosz8嘉泰姆
Wireless Mousesz8嘉泰姆
Digital Still Camerassz8嘉泰姆
MP3/MP4 Playerssz8嘉泰姆
Portable Instrumentssz8嘉泰姆
四.技术规格书下载（产品PDF）sz8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！sz8嘉泰姆

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五,产品封装图 (Package)sz8嘉泰姆
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六.电路原理图sz8嘉泰姆
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七,功能概述sz8嘉泰姆
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1)General Descriptionsz8嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.sz8嘉泰姆
It utilizes internal MOSFET switches to achieve highsz8嘉泰姆
efficiency over full load current range. It operates at asz8嘉泰姆
fixed switching frequency of 1.2MHz, and uses thesz8嘉泰姆
slope compensated peak current mode pulse widthsz8嘉泰姆
modulation (PWM) architecture. The device cansz8嘉泰姆
operate with an input voltage below 1V and thesz8嘉泰姆
minimum start-up voltage is 0.85V.sz8嘉泰姆
2) Current Mode Operation sz8嘉泰姆
The CXSU63034 is based on a slope compensated peaksz8嘉泰姆
current mode PWM control topology. It operates at asz8嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachsz8嘉泰姆
clock cycle, the main switch (NMOS) is turned on andsz8嘉泰姆
the inductor current starts to ramp. After the maximumsz8嘉泰姆
duty cycle or the sense current signal equals the errorsz8嘉泰姆
amplifier output, the main switch is turned off and thesz8嘉泰姆
synchronous switch (PMOS) is turned on. This controlsz8嘉泰姆
topology features cycle-by-cycle current limiting whichsz8嘉泰姆
can prevent the main switch from overstress and thesz8嘉泰姆
external inductor from saturating.sz8嘉泰姆
3) Synchronous Rectification sz8嘉泰姆
The CXSU63034 integrates a synchronous rectifier tosz8嘉泰姆
improve efficiency as well as to eliminate the need forsz8嘉泰姆
an external Schottky diode. The synchronous rectifier issz8嘉泰姆
used to reduce the loss condition contributed by thesz8嘉泰姆
forward voltage of an external Schottky diode. Thesz8嘉泰姆
synchronous rectifier is realized by a P-channel MOSsz8嘉泰姆
(PMOS) with gate control circuitry that incorporatessz8嘉泰姆
八,相关芯片选择指南           更多同类产品........    sz8嘉泰姆

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