0.85V到5V的输入电压CXSU63034高效的固定频率同步DC/DC转换器自动PFM模式电磁干扰抑制反环控制电路

目录fTY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） fTY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fTY嘉泰姆

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一,产品概述(General Description)      fTY嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upfTY嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerfTY嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanfTY嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034fTY嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagefTY嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atfTY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 andfTY嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.fTY嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectfTY嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.fTY嘉泰姆
二.产品特点(Features)fTY嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VfTY嘉泰姆
Voltage Output Range: 2.5V to 5.5VfTY嘉泰姆
Efficiency Up to 94%fTY嘉泰姆
3.3V/100mA Output at 1.0V InputfTY嘉泰姆
5V/700mA Output at 3.6V InputfTY嘉泰姆
Low Start-up Voltage: 0.85V TypicalfTY嘉泰姆
1.2MHz Constant Frequency OperationfTY嘉泰姆
Internal Synchronous RectifierfTY嘉泰姆
EMI Reduction Anti-Ring Control CircuitryfTY嘉泰姆
Low Shutdown Current: < 1.0uAfTY嘉泰姆
Over Current ProtectionfTY嘉泰姆
Over Temperature ProtectionfTY嘉泰姆
Light Load PFM Mode OperationfTY嘉泰姆
SOT23-6 PackagefTY嘉泰姆
三,应用范围 (Applications)fTY嘉泰姆
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 Li-ion Battery ChargerfTY嘉泰姆

 TYPICAL APPLICATIONS
USB AudiofTY嘉泰姆
Wireless MousefTY嘉泰姆
Digital Still CamerasfTY嘉泰姆
MP3/MP4 PlayersfTY嘉泰姆
Portable InstrumentsfTY嘉泰姆
四.技术规格书下载（产品PDF）fTY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！fTY嘉泰姆

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五,产品封装图 (Package)fTY嘉泰姆
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六.电路原理图fTY嘉泰姆
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七,功能概述fTY嘉泰姆
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1)General DescriptionfTY嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.fTY嘉泰姆
It utilizes internal MOSFET switches to achieve highfTY嘉泰姆
efficiency over full load current range. It operates at afTY嘉泰姆
fixed switching frequency of 1.2MHz, and uses thefTY嘉泰姆
slope compensated peak current mode pulse widthfTY嘉泰姆
modulation (PWM) architecture. The device canfTY嘉泰姆
operate with an input voltage below 1V and thefTY嘉泰姆
minimum start-up voltage is 0.85V.fTY嘉泰姆
2) Current Mode Operation fTY嘉泰姆
The CXSU63034 is based on a slope compensated peakfTY嘉泰姆
current mode PWM control topology. It operates at afTY嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachfTY嘉泰姆
clock cycle, the main switch (NMOS) is turned on andfTY嘉泰姆
the inductor current starts to ramp. After the maximumfTY嘉泰姆
duty cycle or the sense current signal equals the errorfTY嘉泰姆
amplifier output, the main switch is turned off and thefTY嘉泰姆
synchronous switch (PMOS) is turned on. This controlfTY嘉泰姆
topology features cycle-by-cycle current limiting whichfTY嘉泰姆
can prevent the main switch from overstress and thefTY嘉泰姆
external inductor from saturating.fTY嘉泰姆
3) Synchronous Rectification fTY嘉泰姆
The CXSU63034 integrates a synchronous rectifier tofTY嘉泰姆
improve efficiency as well as to eliminate the need forfTY嘉泰姆
an external Schottky diode. The synchronous rectifier isfTY嘉泰姆
used to reduce the loss condition contributed by thefTY嘉泰姆
forward voltage of an external Schottky diode. ThefTY嘉泰姆
synchronous rectifier is realized by a P-channel MOSfTY嘉泰姆
(PMOS) with gate control circuitry that incorporatesfTY嘉泰姆
八,相关芯片选择指南           更多同类产品........    fTY嘉泰姆