目录pJ8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） pJ8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pJ8嘉泰姆

 pJ8嘉泰姆

一,产品概述(General Description)      pJ8嘉泰姆
pJ8嘉泰姆
     The CXSU63034 is a highly efficient fix frequencysynchronous step-uppJ8嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerpJ8嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanpJ8嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034pJ8嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagepJ8嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atpJ8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 andpJ8嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.pJ8嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectpJ8嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.pJ8嘉泰姆
二.产品特点(Features)pJ8嘉泰姆
pJ8嘉泰姆
Input Voltage Operating Range: 0.85V to 5VpJ8嘉泰姆
Voltage Output Range: 2.5V to 5.5VpJ8嘉泰姆
Efficiency Up to 94%pJ8嘉泰姆
3.3V/100mA Output at 1.0V InputpJ8嘉泰姆
5V/700mA Output at 3.6V InputpJ8嘉泰姆
Low Start-up Voltage: 0.85V TypicalpJ8嘉泰姆
1.2MHz Constant Frequency OperationpJ8嘉泰姆
Internal Synchronous RectifierpJ8嘉泰姆
EMI Reduction Anti-Ring Control CircuitrypJ8嘉泰姆
Low Shutdown Current: < 1.0uApJ8嘉泰姆
Over Current ProtectionpJ8嘉泰姆
Over Temperature ProtectionpJ8嘉泰姆
Light Load PFM Mode OperationpJ8嘉泰姆
SOT23-6 PackagepJ8嘉泰姆
三,应用范围 (Applications)pJ8嘉泰姆
pJ8嘉泰姆

 Li-ion Battery ChargerpJ8嘉泰姆

 TYPICAL APPLICATIONS
USB AudiopJ8嘉泰姆
Wireless MousepJ8嘉泰姆
Digital Still CameraspJ8嘉泰姆
MP3/MP4 PlayerspJ8嘉泰姆
Portable InstrumentspJ8嘉泰姆
四.技术规格书下载（产品PDF）pJ8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！pJ8嘉泰姆

 pJ8嘉泰姆

五,产品封装图 (Package)pJ8嘉泰姆
pJ8嘉泰姆
pJ8嘉泰姆

六.电路原理图pJ8嘉泰姆
pJ8嘉泰姆
pJ8嘉泰姆
七,功能概述pJ8嘉泰姆
pJ8嘉泰姆
1)General DescriptionpJ8嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.pJ8嘉泰姆
It utilizes internal MOSFET switches to achieve highpJ8嘉泰姆
efficiency over full load current range. It operates at apJ8嘉泰姆
fixed switching frequency of 1.2MHz, and uses thepJ8嘉泰姆
slope compensated peak current mode pulse widthpJ8嘉泰姆
modulation (PWM) architecture. The device canpJ8嘉泰姆
operate with an input voltage below 1V and thepJ8嘉泰姆
minimum start-up voltage is 0.85V.pJ8嘉泰姆
2) Current Mode Operation pJ8嘉泰姆
The CXSU63034 is based on a slope compensated peakpJ8嘉泰姆
current mode PWM control topology. It operates at apJ8嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachpJ8嘉泰姆
clock cycle, the main switch (NMOS) is turned on andpJ8嘉泰姆
the inductor current starts to ramp. After the maximumpJ8嘉泰姆
duty cycle or the sense current signal equals the errorpJ8嘉泰姆
amplifier output, the main switch is turned off and thepJ8嘉泰姆
synchronous switch (PMOS) is turned on. This controlpJ8嘉泰姆
topology features cycle-by-cycle current limiting whichpJ8嘉泰姆
can prevent the main switch from overstress and thepJ8嘉泰姆
external inductor from saturating.pJ8嘉泰姆
3) Synchronous Rectification pJ8嘉泰姆
The CXSU63034 integrates a synchronous rectifier topJ8嘉泰姆
improve efficiency as well as to eliminate the need forpJ8嘉泰姆
an external Schottky diode. The synchronous rectifier ispJ8嘉泰姆
used to reduce the loss condition contributed by thepJ8嘉泰姆
forward voltage of an external Schottky diode. ThepJ8嘉泰姆
synchronous rectifier is realized by a P-channel MOSpJ8嘉泰姆
(PMOS) with gate control circuitry that incorporatespJ8嘉泰姆
八,相关芯片选择指南           更多同类产品........    pJ8嘉泰姆

pJ8嘉泰姆