目录OWU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） OWU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OWU嘉泰姆

 OWU嘉泰姆

一,产品概述(General Description)      OWU嘉泰姆
OWU嘉泰姆
     The CXSU63034 is a highly efficient fix frequencysynchronous step-upOWU嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerOWU嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanOWU嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034OWU嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageOWU嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atOWU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 andOWU嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.OWU嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectOWU嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.OWU嘉泰姆
二.产品特点(Features)OWU嘉泰姆
OWU嘉泰姆
Input Voltage Operating Range: 0.85V to 5VOWU嘉泰姆
Voltage Output Range: 2.5V to 5.5VOWU嘉泰姆
Efficiency Up to 94%OWU嘉泰姆
3.3V/100mA Output at 1.0V InputOWU嘉泰姆
5V/700mA Output at 3.6V InputOWU嘉泰姆
Low Start-up Voltage: 0.85V TypicalOWU嘉泰姆
1.2MHz Constant Frequency OperationOWU嘉泰姆
Internal Synchronous RectifierOWU嘉泰姆
EMI Reduction Anti-Ring Control CircuitryOWU嘉泰姆
Low Shutdown Current: < 1.0uAOWU嘉泰姆
Over Current ProtectionOWU嘉泰姆
Over Temperature ProtectionOWU嘉泰姆
Light Load PFM Mode OperationOWU嘉泰姆
SOT23-6 PackageOWU嘉泰姆
三,应用范围 (Applications)OWU嘉泰姆
OWU嘉泰姆

 Li-ion Battery ChargerOWU嘉泰姆

 TYPICAL APPLICATIONS
USB AudioOWU嘉泰姆
Wireless MouseOWU嘉泰姆
Digital Still CamerasOWU嘉泰姆
MP3/MP4 PlayersOWU嘉泰姆
Portable InstrumentsOWU嘉泰姆
四.技术规格书下载（产品PDF）OWU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！OWU嘉泰姆

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五,产品封装图 (Package)OWU嘉泰姆
OWU嘉泰姆
OWU嘉泰姆

六.电路原理图OWU嘉泰姆
OWU嘉泰姆
OWU嘉泰姆
七,功能概述OWU嘉泰姆
OWU嘉泰姆
1)General DescriptionOWU嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.OWU嘉泰姆
It utilizes internal MOSFET switches to achieve highOWU嘉泰姆
efficiency over full load current range. It operates at aOWU嘉泰姆
fixed switching frequency of 1.2MHz, and uses theOWU嘉泰姆
slope compensated peak current mode pulse widthOWU嘉泰姆
modulation (PWM) architecture. The device canOWU嘉泰姆
operate with an input voltage below 1V and theOWU嘉泰姆
minimum start-up voltage is 0.85V.OWU嘉泰姆
2) Current Mode Operation OWU嘉泰姆
The CXSU63034 is based on a slope compensated peakOWU嘉泰姆
current mode PWM control topology. It operates at aOWU嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachOWU嘉泰姆
clock cycle, the main switch (NMOS) is turned on andOWU嘉泰姆
the inductor current starts to ramp. After the maximumOWU嘉泰姆
duty cycle or the sense current signal equals the errorOWU嘉泰姆
amplifier output, the main switch is turned off and theOWU嘉泰姆
synchronous switch (PMOS) is turned on. This controlOWU嘉泰姆
topology features cycle-by-cycle current limiting whichOWU嘉泰姆
can prevent the main switch from overstress and theOWU嘉泰姆
external inductor from saturating.OWU嘉泰姆
3) Synchronous Rectification OWU嘉泰姆
The CXSU63034 integrates a synchronous rectifier toOWU嘉泰姆
improve efficiency as well as to eliminate the need forOWU嘉泰姆
an external Schottky diode. The synchronous rectifier isOWU嘉泰姆
used to reduce the loss condition contributed by theOWU嘉泰姆
forward voltage of an external Schottky diode. TheOWU嘉泰姆
synchronous rectifier is realized by a P-channel MOSOWU嘉泰姆
(PMOS) with gate control circuitry that incorporatesOWU嘉泰姆
八,相关芯片选择指南           更多同类产品........    OWU嘉泰姆

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