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目录uRJ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） uRJ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uRJ嘉泰姆

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一,产品概述(General Description)      uRJ嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upuRJ嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PoweruRJ嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanuRJ嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034uRJ嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageuRJ嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atuRJ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 anduRJ嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.uRJ嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectuRJ嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.uRJ嘉泰姆
二.产品特点(Features)uRJ嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VuRJ嘉泰姆
Voltage Output Range: 2.5V to 5.5VuRJ嘉泰姆
Efficiency Up to 94%uRJ嘉泰姆
3.3V/100mA Output at 1.0V InputuRJ嘉泰姆
5V/700mA Output at 3.6V InputuRJ嘉泰姆
Low Start-up Voltage: 0.85V TypicaluRJ嘉泰姆
1.2MHz Constant Frequency OperationuRJ嘉泰姆
Internal Synchronous RectifieruRJ嘉泰姆
EMI Reduction Anti-Ring Control CircuitryuRJ嘉泰姆
Low Shutdown Current: < 1.0uAuRJ嘉泰姆
Over Current ProtectionuRJ嘉泰姆
Over Temperature ProtectionuRJ嘉泰姆
Light Load PFM Mode OperationuRJ嘉泰姆
SOT23-6 PackageuRJ嘉泰姆
三,应用范围 (Applications)uRJ嘉泰姆
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 Li-ion Battery ChargeruRJ嘉泰姆

 TYPICAL APPLICATIONS
USB AudiouRJ嘉泰姆
Wireless MouseuRJ嘉泰姆
Digital Still CamerasuRJ嘉泰姆
MP3/MP4 PlayersuRJ嘉泰姆
Portable InstrumentsuRJ嘉泰姆
四.技术规格书下载（产品PDF）uRJ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！uRJ嘉泰姆

 uRJ嘉泰姆

五,产品封装图 (Package)uRJ嘉泰姆
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六.电路原理图uRJ嘉泰姆
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七,功能概述uRJ嘉泰姆
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1)General DescriptionuRJ嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.uRJ嘉泰姆
It utilizes internal MOSFET switches to achieve highuRJ嘉泰姆
efficiency over full load current range. It operates at auRJ嘉泰姆
fixed switching frequency of 1.2MHz, and uses theuRJ嘉泰姆
slope compensated peak current mode pulse widthuRJ嘉泰姆
modulation (PWM) architecture. The device canuRJ嘉泰姆
operate with an input voltage below 1V and theuRJ嘉泰姆
minimum start-up voltage is 0.85V.uRJ嘉泰姆
2) Current Mode Operation uRJ嘉泰姆
The CXSU63034 is based on a slope compensated peakuRJ嘉泰姆
current mode PWM control topology. It operates at auRJ嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachuRJ嘉泰姆
clock cycle, the main switch (NMOS) is turned on anduRJ嘉泰姆
the inductor current starts to ramp. After the maximumuRJ嘉泰姆
duty cycle or the sense current signal equals the erroruRJ嘉泰姆
amplifier output, the main switch is turned off and theuRJ嘉泰姆
synchronous switch (PMOS) is turned on. This controluRJ嘉泰姆
topology features cycle-by-cycle current limiting whichuRJ嘉泰姆
can prevent the main switch from overstress and theuRJ嘉泰姆
external inductor from saturating.uRJ嘉泰姆
3) Synchronous Rectification uRJ嘉泰姆
The CXSU63034 integrates a synchronous rectifier touRJ嘉泰姆
improve efficiency as well as to eliminate the need foruRJ嘉泰姆
an external Schottky diode. The synchronous rectifier isuRJ嘉泰姆
used to reduce the loss condition contributed by theuRJ嘉泰姆
forward voltage of an external Schottky diode. TheuRJ嘉泰姆
synchronous rectifier is realized by a P-channel MOSuRJ嘉泰姆
(PMOS) with gate control circuitry that incorporatesuRJ嘉泰姆
八,相关芯片选择指南           更多同类产品........    uRJ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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