目录B1h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） B1h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B1h嘉泰姆

 B1h嘉泰姆

一,产品概述(General Description)      B1h嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upB1h嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerB1h嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanB1h嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034B1h嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageB1h嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atB1h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 andB1h嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.B1h嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectB1h嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.B1h嘉泰姆
二.产品特点(Features)B1h嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VB1h嘉泰姆
Voltage Output Range: 2.5V to 5.5VB1h嘉泰姆
Efficiency Up to 94%B1h嘉泰姆
3.3V/100mA Output at 1.0V InputB1h嘉泰姆
5V/700mA Output at 3.6V InputB1h嘉泰姆
Low Start-up Voltage: 0.85V TypicalB1h嘉泰姆
1.2MHz Constant Frequency OperationB1h嘉泰姆
Internal Synchronous RectifierB1h嘉泰姆
EMI Reduction Anti-Ring Control CircuitryB1h嘉泰姆
Low Shutdown Current: < 1.0uAB1h嘉泰姆
Over Current ProtectionB1h嘉泰姆
Over Temperature ProtectionB1h嘉泰姆
Light Load PFM Mode OperationB1h嘉泰姆
SOT23-6 PackageB1h嘉泰姆
三,应用范围 (Applications)B1h嘉泰姆
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 Li-ion Battery ChargerB1h嘉泰姆

 TYPICAL APPLICATIONS
USB AudioB1h嘉泰姆
Wireless MouseB1h嘉泰姆
Digital Still CamerasB1h嘉泰姆
MP3/MP4 PlayersB1h嘉泰姆
Portable InstrumentsB1h嘉泰姆
四.技术规格书下载（产品PDF）B1h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！B1h嘉泰姆

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五,产品封装图 (Package)B1h嘉泰姆
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六.电路原理图B1h嘉泰姆
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七,功能概述B1h嘉泰姆
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1)General DescriptionB1h嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.B1h嘉泰姆
It utilizes internal MOSFET switches to achieve highB1h嘉泰姆
efficiency over full load current range. It operates at aB1h嘉泰姆
fixed switching frequency of 1.2MHz, and uses theB1h嘉泰姆
slope compensated peak current mode pulse widthB1h嘉泰姆
modulation (PWM) architecture. The device canB1h嘉泰姆
operate with an input voltage below 1V and theB1h嘉泰姆
minimum start-up voltage is 0.85V.B1h嘉泰姆
2) Current Mode Operation B1h嘉泰姆
The CXSU63034 is based on a slope compensated peakB1h嘉泰姆
current mode PWM control topology. It operates at aB1h嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachB1h嘉泰姆
clock cycle, the main switch (NMOS) is turned on andB1h嘉泰姆
the inductor current starts to ramp. After the maximumB1h嘉泰姆
duty cycle or the sense current signal equals the errorB1h嘉泰姆
amplifier output, the main switch is turned off and theB1h嘉泰姆
synchronous switch (PMOS) is turned on. This controlB1h嘉泰姆
topology features cycle-by-cycle current limiting whichB1h嘉泰姆
can prevent the main switch from overstress and theB1h嘉泰姆
external inductor from saturating.B1h嘉泰姆
3) Synchronous Rectification B1h嘉泰姆
The CXSU63034 integrates a synchronous rectifier toB1h嘉泰姆
improve efficiency as well as to eliminate the need forB1h嘉泰姆
an external Schottky diode. The synchronous rectifier isB1h嘉泰姆
used to reduce the loss condition contributed by theB1h嘉泰姆
forward voltage of an external Schottky diode. TheB1h嘉泰姆
synchronous rectifier is realized by a P-channel MOSB1h嘉泰姆
(PMOS) with gate control circuitry that incorporatesB1h嘉泰姆
八,相关芯片选择指南           更多同类产品........    B1h嘉泰姆

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