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目录EHQ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） EHQ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EHQ嘉泰姆

 EHQ嘉泰姆

一,产品概述(General Description)      EHQ嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upEHQ嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerEHQ嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanEHQ嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034EHQ嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageEHQ嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atEHQ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 andEHQ嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.EHQ嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectEHQ嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.EHQ嘉泰姆
二.产品特点(Features)EHQ嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VEHQ嘉泰姆
Voltage Output Range: 2.5V to 5.5VEHQ嘉泰姆
Efficiency Up to 94%EHQ嘉泰姆
3.3V/100mA Output at 1.0V InputEHQ嘉泰姆
5V/700mA Output at 3.6V InputEHQ嘉泰姆
Low Start-up Voltage: 0.85V TypicalEHQ嘉泰姆
1.2MHz Constant Frequency OperationEHQ嘉泰姆
Internal Synchronous RectifierEHQ嘉泰姆
EMI Reduction Anti-Ring Control CircuitryEHQ嘉泰姆
Low Shutdown Current: < 1.0uAEHQ嘉泰姆
Over Current ProtectionEHQ嘉泰姆
Over Temperature ProtectionEHQ嘉泰姆
Light Load PFM Mode OperationEHQ嘉泰姆
SOT23-6 PackageEHQ嘉泰姆
三,应用范围 (Applications)EHQ嘉泰姆
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 Li-ion Battery ChargerEHQ嘉泰姆

 TYPICAL APPLICATIONS
USB AudioEHQ嘉泰姆
Wireless MouseEHQ嘉泰姆
Digital Still CamerasEHQ嘉泰姆
MP3/MP4 PlayersEHQ嘉泰姆
Portable InstrumentsEHQ嘉泰姆
四.技术规格书下载（产品PDF）EHQ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！EHQ嘉泰姆

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五,产品封装图 (Package)EHQ嘉泰姆
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六.电路原理图EHQ嘉泰姆
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七,功能概述EHQ嘉泰姆
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1)General DescriptionEHQ嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.EHQ嘉泰姆
It utilizes internal MOSFET switches to achieve highEHQ嘉泰姆
efficiency over full load current range. It operates at aEHQ嘉泰姆
fixed switching frequency of 1.2MHz, and uses theEHQ嘉泰姆
slope compensated peak current mode pulse widthEHQ嘉泰姆
modulation (PWM) architecture. The device canEHQ嘉泰姆
operate with an input voltage below 1V and theEHQ嘉泰姆
minimum start-up voltage is 0.85V.EHQ嘉泰姆
2) Current Mode Operation EHQ嘉泰姆
The CXSU63034 is based on a slope compensated peakEHQ嘉泰姆
current mode PWM control topology. It operates at aEHQ嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachEHQ嘉泰姆
clock cycle, the main switch (NMOS) is turned on andEHQ嘉泰姆
the inductor current starts to ramp. After the maximumEHQ嘉泰姆
duty cycle or the sense current signal equals the errorEHQ嘉泰姆
amplifier output, the main switch is turned off and theEHQ嘉泰姆
synchronous switch (PMOS) is turned on. This controlEHQ嘉泰姆
topology features cycle-by-cycle current limiting whichEHQ嘉泰姆
can prevent the main switch from overstress and theEHQ嘉泰姆
external inductor from saturating.EHQ嘉泰姆
3) Synchronous Rectification EHQ嘉泰姆
The CXSU63034 integrates a synchronous rectifier toEHQ嘉泰姆
improve efficiency as well as to eliminate the need forEHQ嘉泰姆
an external Schottky diode. The synchronous rectifier isEHQ嘉泰姆
used to reduce the loss condition contributed by theEHQ嘉泰姆
forward voltage of an external Schottky diode. TheEHQ嘉泰姆
synchronous rectifier is realized by a P-channel MOSEHQ嘉泰姆
(PMOS) with gate control circuitry that incorporatesEHQ嘉泰姆
八,相关芯片选择指南           更多同类产品........    EHQ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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