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目录gBs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） gBs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gBs嘉泰姆

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一,产品概述(General Description)      gBs嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upgBs嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowergBs嘉泰姆
dissipation during operation is only 40μA typical and drops to less thangBs嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034gBs嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltagegBs嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atgBs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 andgBs嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.gBs嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectgBs嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.gBs嘉泰姆
二.产品特点(Features)gBs嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VgBs嘉泰姆
Voltage Output Range: 2.5V to 5.5VgBs嘉泰姆
Efficiency Up to 94%gBs嘉泰姆
3.3V/100mA Output at 1.0V InputgBs嘉泰姆
5V/700mA Output at 3.6V InputgBs嘉泰姆
Low Start-up Voltage: 0.85V TypicalgBs嘉泰姆
1.2MHz Constant Frequency OperationgBs嘉泰姆
Internal Synchronous RectifiergBs嘉泰姆
EMI Reduction Anti-Ring Control CircuitrygBs嘉泰姆
Low Shutdown Current: < 1.0uAgBs嘉泰姆
Over Current ProtectiongBs嘉泰姆
Over Temperature ProtectiongBs嘉泰姆
Light Load PFM Mode OperationgBs嘉泰姆
SOT23-6 PackagegBs嘉泰姆
三,应用范围 (Applications)gBs嘉泰姆
gBs嘉泰姆

 Li-ion Battery ChargergBs嘉泰姆

 TYPICAL APPLICATIONS
USB AudiogBs嘉泰姆
Wireless MousegBs嘉泰姆
Digital Still CamerasgBs嘉泰姆
MP3/MP4 PlayersgBs嘉泰姆
Portable InstrumentsgBs嘉泰姆
四.技术规格书下载（产品PDF）gBs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！gBs嘉泰姆

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五,产品封装图 (Package)gBs嘉泰姆
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gBs嘉泰姆

六.电路原理图gBs嘉泰姆
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七,功能概述gBs嘉泰姆
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1)General DescriptiongBs嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.gBs嘉泰姆
It utilizes internal MOSFET switches to achieve highgBs嘉泰姆
efficiency over full load current range. It operates at agBs嘉泰姆
fixed switching frequency of 1.2MHz, and uses thegBs嘉泰姆
slope compensated peak current mode pulse widthgBs嘉泰姆
modulation (PWM) architecture. The device cangBs嘉泰姆
operate with an input voltage below 1V and thegBs嘉泰姆
minimum start-up voltage is 0.85V.gBs嘉泰姆
2) Current Mode Operation gBs嘉泰姆
The CXSU63034 is based on a slope compensated peakgBs嘉泰姆
current mode PWM control topology. It operates at agBs嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachgBs嘉泰姆
clock cycle, the main switch (NMOS) is turned on andgBs嘉泰姆
the inductor current starts to ramp. After the maximumgBs嘉泰姆
duty cycle or the sense current signal equals the errorgBs嘉泰姆
amplifier output, the main switch is turned off and thegBs嘉泰姆
synchronous switch (PMOS) is turned on. This controlgBs嘉泰姆
topology features cycle-by-cycle current limiting whichgBs嘉泰姆
can prevent the main switch from overstress and thegBs嘉泰姆
external inductor from saturating.gBs嘉泰姆
3) Synchronous Rectification gBs嘉泰姆
The CXSU63034 integrates a synchronous rectifier togBs嘉泰姆
improve efficiency as well as to eliminate the need forgBs嘉泰姆
an external Schottky diode. The synchronous rectifier isgBs嘉泰姆
used to reduce the loss condition contributed by thegBs嘉泰姆
forward voltage of an external Schottky diode. ThegBs嘉泰姆
synchronous rectifier is realized by a P-channel MOSgBs嘉泰姆
(PMOS) with gate control circuitry that incorporatesgBs嘉泰姆
八,相关芯片选择指南           更多同类产品........    gBs嘉泰姆

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