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目录OAb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） OAb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OAb嘉泰姆

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一,产品概述(General Description)      OAb嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upOAb嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerOAb嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanOAb嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034OAb嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageOAb嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atOAb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 andOAb嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.OAb嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectOAb嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.OAb嘉泰姆
二.产品特点(Features)OAb嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VOAb嘉泰姆
Voltage Output Range: 2.5V to 5.5VOAb嘉泰姆
Efficiency Up to 94%OAb嘉泰姆
3.3V/100mA Output at 1.0V InputOAb嘉泰姆
5V/700mA Output at 3.6V InputOAb嘉泰姆
Low Start-up Voltage: 0.85V TypicalOAb嘉泰姆
1.2MHz Constant Frequency OperationOAb嘉泰姆
Internal Synchronous RectifierOAb嘉泰姆
EMI Reduction Anti-Ring Control CircuitryOAb嘉泰姆
Low Shutdown Current: < 1.0uAOAb嘉泰姆
Over Current ProtectionOAb嘉泰姆
Over Temperature ProtectionOAb嘉泰姆
Light Load PFM Mode OperationOAb嘉泰姆
SOT23-6 PackageOAb嘉泰姆
三,应用范围 (Applications)OAb嘉泰姆
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 Li-ion Battery ChargerOAb嘉泰姆

 TYPICAL APPLICATIONS
USB AudioOAb嘉泰姆
Wireless MouseOAb嘉泰姆
Digital Still CamerasOAb嘉泰姆
MP3/MP4 PlayersOAb嘉泰姆
Portable InstrumentsOAb嘉泰姆
四.技术规格书下载（产品PDF）OAb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！OAb嘉泰姆

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五,产品封装图 (Package)OAb嘉泰姆
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六.电路原理图OAb嘉泰姆
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七,功能概述OAb嘉泰姆
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1)General DescriptionOAb嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.OAb嘉泰姆
It utilizes internal MOSFET switches to achieve highOAb嘉泰姆
efficiency over full load current range. It operates at aOAb嘉泰姆
fixed switching frequency of 1.2MHz, and uses theOAb嘉泰姆
slope compensated peak current mode pulse widthOAb嘉泰姆
modulation (PWM) architecture. The device canOAb嘉泰姆
operate with an input voltage below 1V and theOAb嘉泰姆
minimum start-up voltage is 0.85V.OAb嘉泰姆
2) Current Mode Operation OAb嘉泰姆
The CXSU63034 is based on a slope compensated peakOAb嘉泰姆
current mode PWM control topology. It operates at aOAb嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachOAb嘉泰姆
clock cycle, the main switch (NMOS) is turned on andOAb嘉泰姆
the inductor current starts to ramp. After the maximumOAb嘉泰姆
duty cycle or the sense current signal equals the errorOAb嘉泰姆
amplifier output, the main switch is turned off and theOAb嘉泰姆
synchronous switch (PMOS) is turned on. This controlOAb嘉泰姆
topology features cycle-by-cycle current limiting whichOAb嘉泰姆
can prevent the main switch from overstress and theOAb嘉泰姆
external inductor from saturating.OAb嘉泰姆
3) Synchronous Rectification OAb嘉泰姆
The CXSU63034 integrates a synchronous rectifier toOAb嘉泰姆
improve efficiency as well as to eliminate the need forOAb嘉泰姆
an external Schottky diode. The synchronous rectifier isOAb嘉泰姆
used to reduce the loss condition contributed by theOAb嘉泰姆
forward voltage of an external Schottky diode. TheOAb嘉泰姆
synchronous rectifier is realized by a P-channel MOSOAb嘉泰姆
(PMOS) with gate control circuitry that incorporatesOAb嘉泰姆
八,相关芯片选择指南           更多同类产品........    OAb嘉泰姆

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