目录yzX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） yzX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yzX嘉泰姆

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一,产品概述(General Description)      yzX嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upyzX嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PoweryzX嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanyzX嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034yzX嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageyzX嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atyzX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 andyzX嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.yzX嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectyzX嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.yzX嘉泰姆
二.产品特点(Features)yzX嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VyzX嘉泰姆
Voltage Output Range: 2.5V to 5.5VyzX嘉泰姆
Efficiency Up to 94%yzX嘉泰姆
3.3V/100mA Output at 1.0V InputyzX嘉泰姆
5V/700mA Output at 3.6V InputyzX嘉泰姆
Low Start-up Voltage: 0.85V TypicalyzX嘉泰姆
1.2MHz Constant Frequency OperationyzX嘉泰姆
Internal Synchronous RectifieryzX嘉泰姆
EMI Reduction Anti-Ring Control CircuitryyzX嘉泰姆
Low Shutdown Current: < 1.0uAyzX嘉泰姆
Over Current ProtectionyzX嘉泰姆
Over Temperature ProtectionyzX嘉泰姆
Light Load PFM Mode OperationyzX嘉泰姆
SOT23-6 PackageyzX嘉泰姆
三,应用范围 (Applications)yzX嘉泰姆
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 Li-ion Battery ChargeryzX嘉泰姆

 TYPICAL APPLICATIONS
USB AudioyzX嘉泰姆
Wireless MouseyzX嘉泰姆
Digital Still CamerasyzX嘉泰姆
MP3/MP4 PlayersyzX嘉泰姆
Portable InstrumentsyzX嘉泰姆
四.技术规格书下载（产品PDF）yzX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！yzX嘉泰姆

 yzX嘉泰姆

五,产品封装图 (Package)yzX嘉泰姆
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六.电路原理图yzX嘉泰姆
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七,功能概述yzX嘉泰姆
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1)General DescriptionyzX嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.yzX嘉泰姆
It utilizes internal MOSFET switches to achieve highyzX嘉泰姆
efficiency over full load current range. It operates at ayzX嘉泰姆
fixed switching frequency of 1.2MHz, and uses theyzX嘉泰姆
slope compensated peak current mode pulse widthyzX嘉泰姆
modulation (PWM) architecture. The device canyzX嘉泰姆
operate with an input voltage below 1V and theyzX嘉泰姆
minimum start-up voltage is 0.85V.yzX嘉泰姆
2) Current Mode Operation yzX嘉泰姆
The CXSU63034 is based on a slope compensated peakyzX嘉泰姆
current mode PWM control topology. It operates at ayzX嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachyzX嘉泰姆
clock cycle, the main switch (NMOS) is turned on andyzX嘉泰姆
the inductor current starts to ramp. After the maximumyzX嘉泰姆
duty cycle or the sense current signal equals the erroryzX嘉泰姆
amplifier output, the main switch is turned off and theyzX嘉泰姆
synchronous switch (PMOS) is turned on. This controlyzX嘉泰姆
topology features cycle-by-cycle current limiting whichyzX嘉泰姆
can prevent the main switch from overstress and theyzX嘉泰姆
external inductor from saturating.yzX嘉泰姆
3) Synchronous Rectification yzX嘉泰姆
The CXSU63034 integrates a synchronous rectifier toyzX嘉泰姆
improve efficiency as well as to eliminate the need foryzX嘉泰姆
an external Schottky diode. The synchronous rectifier isyzX嘉泰姆
used to reduce the loss condition contributed by theyzX嘉泰姆
forward voltage of an external Schottky diode. TheyzX嘉泰姆
synchronous rectifier is realized by a P-channel MOSyzX嘉泰姆
(PMOS) with gate control circuitry that incorporatesyzX嘉泰姆
八,相关芯片选择指南           更多同类产品........    yzX嘉泰姆

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