目录rf4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） rf4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rf4嘉泰姆

 rf4嘉泰姆

一,产品概述(General Description)      rf4嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-uprf4嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. Powerrf4嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanrf4嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034rf4嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagerf4嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atrf4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 andrf4嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.rf4嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectrf4嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.rf4嘉泰姆
二.产品特点(Features)rf4嘉泰姆
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Input Voltage Operating Range: 0.85V to 5Vrf4嘉泰姆
Voltage Output Range: 2.5V to 5.5Vrf4嘉泰姆
Efficiency Up to 94%rf4嘉泰姆
3.3V/100mA Output at 1.0V Inputrf4嘉泰姆
5V/700mA Output at 3.6V Inputrf4嘉泰姆
Low Start-up Voltage: 0.85V Typicalrf4嘉泰姆
1.2MHz Constant Frequency Operationrf4嘉泰姆
Internal Synchronous Rectifierrf4嘉泰姆
EMI Reduction Anti-Ring Control Circuitryrf4嘉泰姆
Low Shutdown Current: < 1.0uArf4嘉泰姆
Over Current Protectionrf4嘉泰姆
Over Temperature Protectionrf4嘉泰姆
Light Load PFM Mode Operationrf4嘉泰姆
SOT23-6 Packagerf4嘉泰姆
三,应用范围 (Applications)rf4嘉泰姆
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 Li-ion Battery Chargerrf4嘉泰姆

 TYPICAL APPLICATIONS
USB Audiorf4嘉泰姆
Wireless Mouserf4嘉泰姆
Digital Still Camerasrf4嘉泰姆
MP3/MP4 Playersrf4嘉泰姆
Portable Instrumentsrf4嘉泰姆
四.技术规格书下载（产品PDF）rf4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！rf4嘉泰姆

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五,产品封装图 (Package)rf4嘉泰姆
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六.电路原理图rf4嘉泰姆
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七,功能概述rf4嘉泰姆
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1)General Descriptionrf4嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.rf4嘉泰姆
It utilizes internal MOSFET switches to achieve highrf4嘉泰姆
efficiency over full load current range. It operates at arf4嘉泰姆
fixed switching frequency of 1.2MHz, and uses therf4嘉泰姆
slope compensated peak current mode pulse widthrf4嘉泰姆
modulation (PWM) architecture. The device canrf4嘉泰姆
operate with an input voltage below 1V and therf4嘉泰姆
minimum start-up voltage is 0.85V.rf4嘉泰姆
2) Current Mode Operation rf4嘉泰姆
The CXSU63034 is based on a slope compensated peakrf4嘉泰姆
current mode PWM control topology. It operates at arf4嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachrf4嘉泰姆
clock cycle, the main switch (NMOS) is turned on andrf4嘉泰姆
the inductor current starts to ramp. After the maximumrf4嘉泰姆
duty cycle or the sense current signal equals the errorrf4嘉泰姆
amplifier output, the main switch is turned off and therf4嘉泰姆
synchronous switch (PMOS) is turned on. This controlrf4嘉泰姆
topology features cycle-by-cycle current limiting whichrf4嘉泰姆
can prevent the main switch from overstress and therf4嘉泰姆
external inductor from saturating.rf4嘉泰姆
3) Synchronous Rectification rf4嘉泰姆
The CXSU63034 integrates a synchronous rectifier torf4嘉泰姆
improve efficiency as well as to eliminate the need forrf4嘉泰姆
an external Schottky diode. The synchronous rectifier isrf4嘉泰姆
used to reduce the loss condition contributed by therf4嘉泰姆
forward voltage of an external Schottky diode. Therf4嘉泰姆
synchronous rectifier is realized by a P-channel MOSrf4嘉泰姆
(PMOS) with gate control circuitry that incorporatesrf4嘉泰姆
八,相关芯片选择指南           更多同类产品........    rf4嘉泰姆

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