目录qC4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） qC4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qC4嘉泰姆

 qC4嘉泰姆

一,产品概述(General Description)      qC4嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upqC4嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerqC4嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanqC4嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034qC4嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageqC4嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atqC4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 andqC4嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.qC4嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectqC4嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.qC4嘉泰姆
二.产品特点(Features)qC4嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VqC4嘉泰姆
Voltage Output Range: 2.5V to 5.5VqC4嘉泰姆
Efficiency Up to 94%qC4嘉泰姆
3.3V/100mA Output at 1.0V InputqC4嘉泰姆
5V/700mA Output at 3.6V InputqC4嘉泰姆
Low Start-up Voltage: 0.85V TypicalqC4嘉泰姆
1.2MHz Constant Frequency OperationqC4嘉泰姆
Internal Synchronous RectifierqC4嘉泰姆
EMI Reduction Anti-Ring Control CircuitryqC4嘉泰姆
Low Shutdown Current: < 1.0uAqC4嘉泰姆
Over Current ProtectionqC4嘉泰姆
Over Temperature ProtectionqC4嘉泰姆
Light Load PFM Mode OperationqC4嘉泰姆
SOT23-6 PackageqC4嘉泰姆
三,应用范围 (Applications)qC4嘉泰姆
qC4嘉泰姆

 Li-ion Battery ChargerqC4嘉泰姆

 TYPICAL APPLICATIONS
USB AudioqC4嘉泰姆
Wireless MouseqC4嘉泰姆
Digital Still CamerasqC4嘉泰姆
MP3/MP4 PlayersqC4嘉泰姆
Portable InstrumentsqC4嘉泰姆
四.技术规格书下载（产品PDF）qC4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！qC4嘉泰姆

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五,产品封装图 (Package)qC4嘉泰姆
qC4嘉泰姆
qC4嘉泰姆

六.电路原理图qC4嘉泰姆
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qC4嘉泰姆
七,功能概述qC4嘉泰姆
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1)General DescriptionqC4嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.qC4嘉泰姆
It utilizes internal MOSFET switches to achieve highqC4嘉泰姆
efficiency over full load current range. It operates at aqC4嘉泰姆
fixed switching frequency of 1.2MHz, and uses theqC4嘉泰姆
slope compensated peak current mode pulse widthqC4嘉泰姆
modulation (PWM) architecture. The device canqC4嘉泰姆
operate with an input voltage below 1V and theqC4嘉泰姆
minimum start-up voltage is 0.85V.qC4嘉泰姆
2) Current Mode Operation qC4嘉泰姆
The CXSU63034 is based on a slope compensated peakqC4嘉泰姆
current mode PWM control topology. It operates at aqC4嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachqC4嘉泰姆
clock cycle, the main switch (NMOS) is turned on andqC4嘉泰姆
the inductor current starts to ramp. After the maximumqC4嘉泰姆
duty cycle or the sense current signal equals the errorqC4嘉泰姆
amplifier output, the main switch is turned off and theqC4嘉泰姆
synchronous switch (PMOS) is turned on. This controlqC4嘉泰姆
topology features cycle-by-cycle current limiting whichqC4嘉泰姆
can prevent the main switch from overstress and theqC4嘉泰姆
external inductor from saturating.qC4嘉泰姆
3) Synchronous Rectification qC4嘉泰姆
The CXSU63034 integrates a synchronous rectifier toqC4嘉泰姆
improve efficiency as well as to eliminate the need forqC4嘉泰姆
an external Schottky diode. The synchronous rectifier isqC4嘉泰姆
used to reduce the loss condition contributed by theqC4嘉泰姆
forward voltage of an external Schottky diode. TheqC4嘉泰姆
synchronous rectifier is realized by a P-channel MOSqC4嘉泰姆
(PMOS) with gate control circuitry that incorporatesqC4嘉泰姆
八,相关芯片选择指南           更多同类产品........    qC4嘉泰姆

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