目录Bm3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） Bm3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Bm3嘉泰姆

 Bm3嘉泰姆

一,产品概述(General Description)      Bm3嘉泰姆
Bm3嘉泰姆
     The CXSU63034 is a highly efficient fix frequencysynchronous step-upBm3嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerBm3嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanBm3嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034Bm3嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageBm3嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atBm3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 andBm3嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.Bm3嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectBm3嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.Bm3嘉泰姆
二.产品特点(Features)Bm3嘉泰姆
Bm3嘉泰姆
Input Voltage Operating Range: 0.85V to 5VBm3嘉泰姆
Voltage Output Range: 2.5V to 5.5VBm3嘉泰姆
Efficiency Up to 94%Bm3嘉泰姆
3.3V/100mA Output at 1.0V InputBm3嘉泰姆
5V/700mA Output at 3.6V InputBm3嘉泰姆
Low Start-up Voltage: 0.85V TypicalBm3嘉泰姆
1.2MHz Constant Frequency OperationBm3嘉泰姆
Internal Synchronous RectifierBm3嘉泰姆
EMI Reduction Anti-Ring Control CircuitryBm3嘉泰姆
Low Shutdown Current: < 1.0uABm3嘉泰姆
Over Current ProtectionBm3嘉泰姆
Over Temperature ProtectionBm3嘉泰姆
Light Load PFM Mode OperationBm3嘉泰姆
SOT23-6 PackageBm3嘉泰姆
三,应用范围 (Applications)Bm3嘉泰姆
Bm3嘉泰姆

 Li-ion Battery ChargerBm3嘉泰姆

 TYPICAL APPLICATIONS
USB AudioBm3嘉泰姆
Wireless MouseBm3嘉泰姆
Digital Still CamerasBm3嘉泰姆
MP3/MP4 PlayersBm3嘉泰姆
Portable InstrumentsBm3嘉泰姆
四.技术规格书下载（产品PDF）Bm3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！Bm3嘉泰姆

 Bm3嘉泰姆

五,产品封装图 (Package)Bm3嘉泰姆
Bm3嘉泰姆
Bm3嘉泰姆

六.电路原理图Bm3嘉泰姆
Bm3嘉泰姆
Bm3嘉泰姆
七,功能概述Bm3嘉泰姆
Bm3嘉泰姆
1)General DescriptionBm3嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.Bm3嘉泰姆
It utilizes internal MOSFET switches to achieve highBm3嘉泰姆
efficiency over full load current range. It operates at aBm3嘉泰姆
fixed switching frequency of 1.2MHz, and uses theBm3嘉泰姆
slope compensated peak current mode pulse widthBm3嘉泰姆
modulation (PWM) architecture. The device canBm3嘉泰姆
operate with an input voltage below 1V and theBm3嘉泰姆
minimum start-up voltage is 0.85V.Bm3嘉泰姆
2) Current Mode Operation Bm3嘉泰姆
The CXSU63034 is based on a slope compensated peakBm3嘉泰姆
current mode PWM control topology. It operates at aBm3嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachBm3嘉泰姆
clock cycle, the main switch (NMOS) is turned on andBm3嘉泰姆
the inductor current starts to ramp. After the maximumBm3嘉泰姆
duty cycle or the sense current signal equals the errorBm3嘉泰姆
amplifier output, the main switch is turned off and theBm3嘉泰姆
synchronous switch (PMOS) is turned on. This controlBm3嘉泰姆
topology features cycle-by-cycle current limiting whichBm3嘉泰姆
can prevent the main switch from overstress and theBm3嘉泰姆
external inductor from saturating.Bm3嘉泰姆
3) Synchronous Rectification Bm3嘉泰姆
The CXSU63034 integrates a synchronous rectifier toBm3嘉泰姆
improve efficiency as well as to eliminate the need forBm3嘉泰姆
an external Schottky diode. The synchronous rectifier isBm3嘉泰姆
used to reduce the loss condition contributed by theBm3嘉泰姆
forward voltage of an external Schottky diode. TheBm3嘉泰姆
synchronous rectifier is realized by a P-channel MOSBm3嘉泰姆
(PMOS) with gate control circuitry that incorporatesBm3嘉泰姆
八,相关芯片选择指南           更多同类产品........    Bm3嘉泰姆

Bm3嘉泰姆