目录y3z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） y3z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y3z嘉泰姆

 y3z嘉泰姆

一,产品概述(General Description)      y3z嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upy3z嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. Powery3z嘉泰姆
dissipation during operation is only 40μA typical and drops to less thany3z嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034y3z嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagey3z嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency aty3z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 andy3z嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.y3z嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effecty3z嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.y3z嘉泰姆
二.产品特点(Features)y3z嘉泰姆
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Input Voltage Operating Range: 0.85V to 5Vy3z嘉泰姆
Voltage Output Range: 2.5V to 5.5Vy3z嘉泰姆
Efficiency Up to 94%y3z嘉泰姆
3.3V/100mA Output at 1.0V Inputy3z嘉泰姆
5V/700mA Output at 3.6V Inputy3z嘉泰姆
Low Start-up Voltage: 0.85V Typicaly3z嘉泰姆
1.2MHz Constant Frequency Operationy3z嘉泰姆
Internal Synchronous Rectifiery3z嘉泰姆
EMI Reduction Anti-Ring Control Circuitryy3z嘉泰姆
Low Shutdown Current: < 1.0uAy3z嘉泰姆
Over Current Protectiony3z嘉泰姆
Over Temperature Protectiony3z嘉泰姆
Light Load PFM Mode Operationy3z嘉泰姆
SOT23-6 Packagey3z嘉泰姆
三,应用范围 (Applications)y3z嘉泰姆
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 Li-ion Battery Chargery3z嘉泰姆

 TYPICAL APPLICATIONS
USB Audioy3z嘉泰姆
Wireless Mousey3z嘉泰姆
Digital Still Camerasy3z嘉泰姆
MP3/MP4 Playersy3z嘉泰姆
Portable Instrumentsy3z嘉泰姆
四.技术规格书下载（产品PDF）y3z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！y3z嘉泰姆

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五,产品封装图 (Package)y3z嘉泰姆
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六.电路原理图y3z嘉泰姆
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七,功能概述y3z嘉泰姆
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1)General Descriptiony3z嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.y3z嘉泰姆
It utilizes internal MOSFET switches to achieve highy3z嘉泰姆
efficiency over full load current range. It operates at ay3z嘉泰姆
fixed switching frequency of 1.2MHz, and uses they3z嘉泰姆
slope compensated peak current mode pulse widthy3z嘉泰姆
modulation (PWM) architecture. The device cany3z嘉泰姆
operate with an input voltage below 1V and they3z嘉泰姆
minimum start-up voltage is 0.85V.y3z嘉泰姆
2) Current Mode Operation y3z嘉泰姆
The CXSU63034 is based on a slope compensated peaky3z嘉泰姆
current mode PWM control topology. It operates at ay3z嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachy3z嘉泰姆
clock cycle, the main switch (NMOS) is turned on andy3z嘉泰姆
the inductor current starts to ramp. After the maximumy3z嘉泰姆
duty cycle or the sense current signal equals the errory3z嘉泰姆
amplifier output, the main switch is turned off and they3z嘉泰姆
synchronous switch (PMOS) is turned on. This controly3z嘉泰姆
topology features cycle-by-cycle current limiting whichy3z嘉泰姆
can prevent the main switch from overstress and they3z嘉泰姆
external inductor from saturating.y3z嘉泰姆
3) Synchronous Rectification y3z嘉泰姆
The CXSU63034 integrates a synchronous rectifier toy3z嘉泰姆
improve efficiency as well as to eliminate the need fory3z嘉泰姆
an external Schottky diode. The synchronous rectifier isy3z嘉泰姆
used to reduce the loss condition contributed by they3z嘉泰姆
forward voltage of an external Schottky diode. They3z嘉泰姆
synchronous rectifier is realized by a P-channel MOSy3z嘉泰姆
(PMOS) with gate control circuitry that incorporatesy3z嘉泰姆
八,相关芯片选择指南           更多同类产品........    y3z嘉泰姆

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