目录QXt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） QXt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QXt嘉泰姆

 QXt嘉泰姆

一,产品概述(General Description)      QXt嘉泰姆
QXt嘉泰姆
     The CXSU63034 is a highly efficient fix frequencysynchronous step-upQXt嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerQXt嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanQXt嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034QXt嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageQXt嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atQXt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 andQXt嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.QXt嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectQXt嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.QXt嘉泰姆
二.产品特点(Features)QXt嘉泰姆
QXt嘉泰姆
Input Voltage Operating Range: 0.85V to 5VQXt嘉泰姆
Voltage Output Range: 2.5V to 5.5VQXt嘉泰姆
Efficiency Up to 94%QXt嘉泰姆
3.3V/100mA Output at 1.0V InputQXt嘉泰姆
5V/700mA Output at 3.6V InputQXt嘉泰姆
Low Start-up Voltage: 0.85V TypicalQXt嘉泰姆
1.2MHz Constant Frequency OperationQXt嘉泰姆
Internal Synchronous RectifierQXt嘉泰姆
EMI Reduction Anti-Ring Control CircuitryQXt嘉泰姆
Low Shutdown Current: < 1.0uAQXt嘉泰姆
Over Current ProtectionQXt嘉泰姆
Over Temperature ProtectionQXt嘉泰姆
Light Load PFM Mode OperationQXt嘉泰姆
SOT23-6 PackageQXt嘉泰姆
三,应用范围 (Applications)QXt嘉泰姆
QXt嘉泰姆

 Li-ion Battery ChargerQXt嘉泰姆

 TYPICAL APPLICATIONS
USB AudioQXt嘉泰姆
Wireless MouseQXt嘉泰姆
Digital Still CamerasQXt嘉泰姆
MP3/MP4 PlayersQXt嘉泰姆
Portable InstrumentsQXt嘉泰姆
四.技术规格书下载（产品PDF）QXt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！QXt嘉泰姆

 QXt嘉泰姆

五,产品封装图 (Package)QXt嘉泰姆
QXt嘉泰姆
QXt嘉泰姆

六.电路原理图QXt嘉泰姆
QXt嘉泰姆
QXt嘉泰姆
七,功能概述QXt嘉泰姆
QXt嘉泰姆
1)General DescriptionQXt嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.QXt嘉泰姆
It utilizes internal MOSFET switches to achieve highQXt嘉泰姆
efficiency over full load current range. It operates at aQXt嘉泰姆
fixed switching frequency of 1.2MHz, and uses theQXt嘉泰姆
slope compensated peak current mode pulse widthQXt嘉泰姆
modulation (PWM) architecture. The device canQXt嘉泰姆
operate with an input voltage below 1V and theQXt嘉泰姆
minimum start-up voltage is 0.85V.QXt嘉泰姆
2) Current Mode Operation QXt嘉泰姆
The CXSU63034 is based on a slope compensated peakQXt嘉泰姆
current mode PWM control topology. It operates at aQXt嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachQXt嘉泰姆
clock cycle, the main switch (NMOS) is turned on andQXt嘉泰姆
the inductor current starts to ramp. After the maximumQXt嘉泰姆
duty cycle or the sense current signal equals the errorQXt嘉泰姆
amplifier output, the main switch is turned off and theQXt嘉泰姆
synchronous switch (PMOS) is turned on. This controlQXt嘉泰姆
topology features cycle-by-cycle current limiting whichQXt嘉泰姆
can prevent the main switch from overstress and theQXt嘉泰姆
external inductor from saturating.QXt嘉泰姆
3) Synchronous Rectification QXt嘉泰姆
The CXSU63034 integrates a synchronous rectifier toQXt嘉泰姆
improve efficiency as well as to eliminate the need forQXt嘉泰姆
an external Schottky diode. The synchronous rectifier isQXt嘉泰姆
used to reduce the loss condition contributed by theQXt嘉泰姆
forward voltage of an external Schottky diode. TheQXt嘉泰姆
synchronous rectifier is realized by a P-channel MOSQXt嘉泰姆
(PMOS) with gate control circuitry that incorporatesQXt嘉泰姆
八,相关芯片选择指南           更多同类产品........    QXt嘉泰姆

QXt嘉泰姆