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目录BjJ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） BjJ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BjJ嘉泰姆

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一,产品概述(General Description)      BjJ嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upBjJ嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerBjJ嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanBjJ嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034BjJ嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageBjJ嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atBjJ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 andBjJ嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.BjJ嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectBjJ嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.BjJ嘉泰姆
二.产品特点(Features)BjJ嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VBjJ嘉泰姆
Voltage Output Range: 2.5V to 5.5VBjJ嘉泰姆
Efficiency Up to 94%BjJ嘉泰姆
3.3V/100mA Output at 1.0V InputBjJ嘉泰姆
5V/700mA Output at 3.6V InputBjJ嘉泰姆
Low Start-up Voltage: 0.85V TypicalBjJ嘉泰姆
1.2MHz Constant Frequency OperationBjJ嘉泰姆
Internal Synchronous RectifierBjJ嘉泰姆
EMI Reduction Anti-Ring Control CircuitryBjJ嘉泰姆
Low Shutdown Current: < 1.0uABjJ嘉泰姆
Over Current ProtectionBjJ嘉泰姆
Over Temperature ProtectionBjJ嘉泰姆
Light Load PFM Mode OperationBjJ嘉泰姆
SOT23-6 PackageBjJ嘉泰姆
三,应用范围 (Applications)BjJ嘉泰姆
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 Li-ion Battery ChargerBjJ嘉泰姆

 TYPICAL APPLICATIONS
USB AudioBjJ嘉泰姆
Wireless MouseBjJ嘉泰姆
Digital Still CamerasBjJ嘉泰姆
MP3/MP4 PlayersBjJ嘉泰姆
Portable InstrumentsBjJ嘉泰姆
四.技术规格书下载（产品PDF）BjJ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！BjJ嘉泰姆

 BjJ嘉泰姆

五,产品封装图 (Package)BjJ嘉泰姆
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六.电路原理图BjJ嘉泰姆
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七,功能概述BjJ嘉泰姆
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1)General DescriptionBjJ嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.BjJ嘉泰姆
It utilizes internal MOSFET switches to achieve highBjJ嘉泰姆
efficiency over full load current range. It operates at aBjJ嘉泰姆
fixed switching frequency of 1.2MHz, and uses theBjJ嘉泰姆
slope compensated peak current mode pulse widthBjJ嘉泰姆
modulation (PWM) architecture. The device canBjJ嘉泰姆
operate with an input voltage below 1V and theBjJ嘉泰姆
minimum start-up voltage is 0.85V.BjJ嘉泰姆
2) Current Mode Operation BjJ嘉泰姆
The CXSU63034 is based on a slope compensated peakBjJ嘉泰姆
current mode PWM control topology. It operates at aBjJ嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachBjJ嘉泰姆
clock cycle, the main switch (NMOS) is turned on andBjJ嘉泰姆
the inductor current starts to ramp. After the maximumBjJ嘉泰姆
duty cycle or the sense current signal equals the errorBjJ嘉泰姆
amplifier output, the main switch is turned off and theBjJ嘉泰姆
synchronous switch (PMOS) is turned on. This controlBjJ嘉泰姆
topology features cycle-by-cycle current limiting whichBjJ嘉泰姆
can prevent the main switch from overstress and theBjJ嘉泰姆
external inductor from saturating.BjJ嘉泰姆
3) Synchronous Rectification BjJ嘉泰姆
The CXSU63034 integrates a synchronous rectifier toBjJ嘉泰姆
improve efficiency as well as to eliminate the need forBjJ嘉泰姆
an external Schottky diode. The synchronous rectifier isBjJ嘉泰姆
used to reduce the loss condition contributed by theBjJ嘉泰姆
forward voltage of an external Schottky diode. TheBjJ嘉泰姆
synchronous rectifier is realized by a P-channel MOSBjJ嘉泰姆
(PMOS) with gate control circuitry that incorporatesBjJ嘉泰姆
八,相关芯片选择指南           更多同类产品........    BjJ嘉泰姆

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◀ 上一篇:1.5MHz定频开关内部同步整流器2.5V至5V输出自动PFM/PWM模式运行CXSU63033A定频升压型DC/DC变换器

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