目录pWU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） pWU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pWU嘉泰姆

 pWU嘉泰姆

一,产品概述(General Description)      pWU嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-uppWU嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerpWU嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanpWU嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034pWU嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagepWU嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atpWU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 andpWU嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.pWU嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectpWU嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.pWU嘉泰姆
二.产品特点(Features)pWU嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VpWU嘉泰姆
Voltage Output Range: 2.5V to 5.5VpWU嘉泰姆
Efficiency Up to 94%pWU嘉泰姆
3.3V/100mA Output at 1.0V InputpWU嘉泰姆
5V/700mA Output at 3.6V InputpWU嘉泰姆
Low Start-up Voltage: 0.85V TypicalpWU嘉泰姆
1.2MHz Constant Frequency OperationpWU嘉泰姆
Internal Synchronous RectifierpWU嘉泰姆
EMI Reduction Anti-Ring Control CircuitrypWU嘉泰姆
Low Shutdown Current: < 1.0uApWU嘉泰姆
Over Current ProtectionpWU嘉泰姆
Over Temperature ProtectionpWU嘉泰姆
Light Load PFM Mode OperationpWU嘉泰姆
SOT23-6 PackagepWU嘉泰姆
三,应用范围 (Applications)pWU嘉泰姆
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 Li-ion Battery ChargerpWU嘉泰姆

 TYPICAL APPLICATIONS
USB AudiopWU嘉泰姆
Wireless MousepWU嘉泰姆
Digital Still CameraspWU嘉泰姆
MP3/MP4 PlayerspWU嘉泰姆
Portable InstrumentspWU嘉泰姆
四.技术规格书下载（产品PDF）pWU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！pWU嘉泰姆

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五,产品封装图 (Package)pWU嘉泰姆
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pWU嘉泰姆

六.电路原理图pWU嘉泰姆
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七,功能概述pWU嘉泰姆
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1)General DescriptionpWU嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.pWU嘉泰姆
It utilizes internal MOSFET switches to achieve highpWU嘉泰姆
efficiency over full load current range. It operates at apWU嘉泰姆
fixed switching frequency of 1.2MHz, and uses thepWU嘉泰姆
slope compensated peak current mode pulse widthpWU嘉泰姆
modulation (PWM) architecture. The device canpWU嘉泰姆
operate with an input voltage below 1V and thepWU嘉泰姆
minimum start-up voltage is 0.85V.pWU嘉泰姆
2) Current Mode Operation pWU嘉泰姆
The CXSU63034 is based on a slope compensated peakpWU嘉泰姆
current mode PWM control topology. It operates at apWU嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachpWU嘉泰姆
clock cycle, the main switch (NMOS) is turned on andpWU嘉泰姆
the inductor current starts to ramp. After the maximumpWU嘉泰姆
duty cycle or the sense current signal equals the errorpWU嘉泰姆
amplifier output, the main switch is turned off and thepWU嘉泰姆
synchronous switch (PMOS) is turned on. This controlpWU嘉泰姆
topology features cycle-by-cycle current limiting whichpWU嘉泰姆
can prevent the main switch from overstress and thepWU嘉泰姆
external inductor from saturating.pWU嘉泰姆
3) Synchronous Rectification pWU嘉泰姆
The CXSU63034 integrates a synchronous rectifier topWU嘉泰姆
improve efficiency as well as to eliminate the need forpWU嘉泰姆
an external Schottky diode. The synchronous rectifier ispWU嘉泰姆
used to reduce the loss condition contributed by thepWU嘉泰姆
forward voltage of an external Schottky diode. ThepWU嘉泰姆
synchronous rectifier is realized by a P-channel MOSpWU嘉泰姆
(PMOS) with gate control circuitry that incorporatespWU嘉泰姆
八,相关芯片选择指南           更多同类产品........    pWU嘉泰姆

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