目录bWM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） bWM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bWM嘉泰姆

 bWM嘉泰姆

一,产品概述(General Description)      bWM嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upbWM嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerbWM嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanbWM嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034bWM嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagebWM嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atbWM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 andbWM嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.bWM嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectbWM嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.bWM嘉泰姆
二.产品特点(Features)bWM嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VbWM嘉泰姆
Voltage Output Range: 2.5V to 5.5VbWM嘉泰姆
Efficiency Up to 94%bWM嘉泰姆
3.3V/100mA Output at 1.0V InputbWM嘉泰姆
5V/700mA Output at 3.6V InputbWM嘉泰姆
Low Start-up Voltage: 0.85V TypicalbWM嘉泰姆
1.2MHz Constant Frequency OperationbWM嘉泰姆
Internal Synchronous RectifierbWM嘉泰姆
EMI Reduction Anti-Ring Control CircuitrybWM嘉泰姆
Low Shutdown Current: < 1.0uAbWM嘉泰姆
Over Current ProtectionbWM嘉泰姆
Over Temperature ProtectionbWM嘉泰姆
Light Load PFM Mode OperationbWM嘉泰姆
SOT23-6 PackagebWM嘉泰姆
三,应用范围 (Applications)bWM嘉泰姆
bWM嘉泰姆

 Li-ion Battery ChargerbWM嘉泰姆

 TYPICAL APPLICATIONS
USB AudiobWM嘉泰姆
Wireless MousebWM嘉泰姆
Digital Still CamerasbWM嘉泰姆
MP3/MP4 PlayersbWM嘉泰姆
Portable InstrumentsbWM嘉泰姆
四.技术规格书下载（产品PDF）bWM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！bWM嘉泰姆

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五,产品封装图 (Package)bWM嘉泰姆
bWM嘉泰姆
bWM嘉泰姆

六.电路原理图bWM嘉泰姆
bWM嘉泰姆
bWM嘉泰姆
七,功能概述bWM嘉泰姆
bWM嘉泰姆
1)General DescriptionbWM嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.bWM嘉泰姆
It utilizes internal MOSFET switches to achieve highbWM嘉泰姆
efficiency over full load current range. It operates at abWM嘉泰姆
fixed switching frequency of 1.2MHz, and uses thebWM嘉泰姆
slope compensated peak current mode pulse widthbWM嘉泰姆
modulation (PWM) architecture. The device canbWM嘉泰姆
operate with an input voltage below 1V and thebWM嘉泰姆
minimum start-up voltage is 0.85V.bWM嘉泰姆
2) Current Mode Operation bWM嘉泰姆
The CXSU63034 is based on a slope compensated peakbWM嘉泰姆
current mode PWM control topology. It operates at abWM嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachbWM嘉泰姆
clock cycle, the main switch (NMOS) is turned on andbWM嘉泰姆
the inductor current starts to ramp. After the maximumbWM嘉泰姆
duty cycle or the sense current signal equals the errorbWM嘉泰姆
amplifier output, the main switch is turned off and thebWM嘉泰姆
synchronous switch (PMOS) is turned on. This controlbWM嘉泰姆
topology features cycle-by-cycle current limiting whichbWM嘉泰姆
can prevent the main switch from overstress and thebWM嘉泰姆
external inductor from saturating.bWM嘉泰姆
3) Synchronous Rectification bWM嘉泰姆
The CXSU63034 integrates a synchronous rectifier tobWM嘉泰姆
improve efficiency as well as to eliminate the need forbWM嘉泰姆
an external Schottky diode. The synchronous rectifier isbWM嘉泰姆
used to reduce the loss condition contributed by thebWM嘉泰姆
forward voltage of an external Schottky diode. ThebWM嘉泰姆
synchronous rectifier is realized by a P-channel MOSbWM嘉泰姆
(PMOS) with gate control circuitry that incorporatesbWM嘉泰姆
八,相关芯片选择指南           更多同类产品........    bWM嘉泰姆

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