目录N6y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） N6y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N6y嘉泰姆

 N6y嘉泰姆

一,产品概述(General Description)      N6y嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upN6y嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerN6y嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanN6y嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034N6y嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageN6y嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atN6y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 andN6y嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.N6y嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectN6y嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.N6y嘉泰姆
二.产品特点(Features)N6y嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VN6y嘉泰姆
Voltage Output Range: 2.5V to 5.5VN6y嘉泰姆
Efficiency Up to 94%N6y嘉泰姆
3.3V/100mA Output at 1.0V InputN6y嘉泰姆
5V/700mA Output at 3.6V InputN6y嘉泰姆
Low Start-up Voltage: 0.85V TypicalN6y嘉泰姆
1.2MHz Constant Frequency OperationN6y嘉泰姆
Internal Synchronous RectifierN6y嘉泰姆
EMI Reduction Anti-Ring Control CircuitryN6y嘉泰姆
Low Shutdown Current: < 1.0uAN6y嘉泰姆
Over Current ProtectionN6y嘉泰姆
Over Temperature ProtectionN6y嘉泰姆
Light Load PFM Mode OperationN6y嘉泰姆
SOT23-6 PackageN6y嘉泰姆
三,应用范围 (Applications)N6y嘉泰姆
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 Li-ion Battery ChargerN6y嘉泰姆

 TYPICAL APPLICATIONS
USB AudioN6y嘉泰姆
Wireless MouseN6y嘉泰姆
Digital Still CamerasN6y嘉泰姆
MP3/MP4 PlayersN6y嘉泰姆
Portable InstrumentsN6y嘉泰姆
四.技术规格书下载（产品PDF）N6y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！N6y嘉泰姆

 N6y嘉泰姆

五,产品封装图 (Package)N6y嘉泰姆
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六.电路原理图N6y嘉泰姆
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七,功能概述N6y嘉泰姆
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1)General DescriptionN6y嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.N6y嘉泰姆
It utilizes internal MOSFET switches to achieve highN6y嘉泰姆
efficiency over full load current range. It operates at aN6y嘉泰姆
fixed switching frequency of 1.2MHz, and uses theN6y嘉泰姆
slope compensated peak current mode pulse widthN6y嘉泰姆
modulation (PWM) architecture. The device canN6y嘉泰姆
operate with an input voltage below 1V and theN6y嘉泰姆
minimum start-up voltage is 0.85V.N6y嘉泰姆
2) Current Mode Operation N6y嘉泰姆
The CXSU63034 is based on a slope compensated peakN6y嘉泰姆
current mode PWM control topology. It operates at aN6y嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachN6y嘉泰姆
clock cycle, the main switch (NMOS) is turned on andN6y嘉泰姆
the inductor current starts to ramp. After the maximumN6y嘉泰姆
duty cycle or the sense current signal equals the errorN6y嘉泰姆
amplifier output, the main switch is turned off and theN6y嘉泰姆
synchronous switch (PMOS) is turned on. This controlN6y嘉泰姆
topology features cycle-by-cycle current limiting whichN6y嘉泰姆
can prevent the main switch from overstress and theN6y嘉泰姆
external inductor from saturating.N6y嘉泰姆
3) Synchronous Rectification N6y嘉泰姆
The CXSU63034 integrates a synchronous rectifier toN6y嘉泰姆
improve efficiency as well as to eliminate the need forN6y嘉泰姆
an external Schottky diode. The synchronous rectifier isN6y嘉泰姆
used to reduce the loss condition contributed by theN6y嘉泰姆
forward voltage of an external Schottky diode. TheN6y嘉泰姆
synchronous rectifier is realized by a P-channel MOSN6y嘉泰姆
(PMOS) with gate control circuitry that incorporatesN6y嘉泰姆
八,相关芯片选择指南           更多同类产品........    N6y嘉泰姆

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