目录vo4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） vo4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vo4嘉泰姆

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一,产品概述(General Description)      vo4嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upvo4嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. Powervo4嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanvo4嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034vo4嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagevo4嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atvo4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 andvo4嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.vo4嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectvo4嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.vo4嘉泰姆
二.产品特点(Features)vo4嘉泰姆
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Input Voltage Operating Range: 0.85V to 5Vvo4嘉泰姆
Voltage Output Range: 2.5V to 5.5Vvo4嘉泰姆
Efficiency Up to 94%vo4嘉泰姆
3.3V/100mA Output at 1.0V Inputvo4嘉泰姆
5V/700mA Output at 3.6V Inputvo4嘉泰姆
Low Start-up Voltage: 0.85V Typicalvo4嘉泰姆
1.2MHz Constant Frequency Operationvo4嘉泰姆
Internal Synchronous Rectifiervo4嘉泰姆
EMI Reduction Anti-Ring Control Circuitryvo4嘉泰姆
Low Shutdown Current: < 1.0uAvo4嘉泰姆
Over Current Protectionvo4嘉泰姆
Over Temperature Protectionvo4嘉泰姆
Light Load PFM Mode Operationvo4嘉泰姆
SOT23-6 Packagevo4嘉泰姆
三,应用范围 (Applications)vo4嘉泰姆
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 Li-ion Battery Chargervo4嘉泰姆

 TYPICAL APPLICATIONS
USB Audiovo4嘉泰姆
Wireless Mousevo4嘉泰姆
Digital Still Camerasvo4嘉泰姆
MP3/MP4 Playersvo4嘉泰姆
Portable Instrumentsvo4嘉泰姆
四.技术规格书下载（产品PDF）vo4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！vo4嘉泰姆

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五,产品封装图 (Package)vo4嘉泰姆
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六.电路原理图vo4嘉泰姆
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七,功能概述vo4嘉泰姆
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1)General Descriptionvo4嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.vo4嘉泰姆
It utilizes internal MOSFET switches to achieve highvo4嘉泰姆
efficiency over full load current range. It operates at avo4嘉泰姆
fixed switching frequency of 1.2MHz, and uses thevo4嘉泰姆
slope compensated peak current mode pulse widthvo4嘉泰姆
modulation (PWM) architecture. The device canvo4嘉泰姆
operate with an input voltage below 1V and thevo4嘉泰姆
minimum start-up voltage is 0.85V.vo4嘉泰姆
2) Current Mode Operation vo4嘉泰姆
The CXSU63034 is based on a slope compensated peakvo4嘉泰姆
current mode PWM control topology. It operates at avo4嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachvo4嘉泰姆
clock cycle, the main switch (NMOS) is turned on andvo4嘉泰姆
the inductor current starts to ramp. After the maximumvo4嘉泰姆
duty cycle or the sense current signal equals the errorvo4嘉泰姆
amplifier output, the main switch is turned off and thevo4嘉泰姆
synchronous switch (PMOS) is turned on. This controlvo4嘉泰姆
topology features cycle-by-cycle current limiting whichvo4嘉泰姆
can prevent the main switch from overstress and thevo4嘉泰姆
external inductor from saturating.vo4嘉泰姆
3) Synchronous Rectification vo4嘉泰姆
The CXSU63034 integrates a synchronous rectifier tovo4嘉泰姆
improve efficiency as well as to eliminate the need forvo4嘉泰姆
an external Schottky diode. The synchronous rectifier isvo4嘉泰姆
used to reduce the loss condition contributed by thevo4嘉泰姆
forward voltage of an external Schottky diode. Thevo4嘉泰姆
synchronous rectifier is realized by a P-channel MOSvo4嘉泰姆
(PMOS) with gate control circuitry that incorporatesvo4嘉泰姆
八,相关芯片选择指南           更多同类产品........    vo4嘉泰姆

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