目录Q4K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） Q4K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Q4K嘉泰姆

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一,产品概述(General Description)      Q4K嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upQ4K嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowerQ4K嘉泰姆
dissipation during operation is only 40μA typical and drops to less thanQ4K嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034Q4K嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageQ4K嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency atQ4K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 andQ4K嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.Q4K嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effectQ4K嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.Q4K嘉泰姆
二.产品特点(Features)Q4K嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VQ4K嘉泰姆
Voltage Output Range: 2.5V to 5.5VQ4K嘉泰姆
Efficiency Up to 94%Q4K嘉泰姆
3.3V/100mA Output at 1.0V InputQ4K嘉泰姆
5V/700mA Output at 3.6V InputQ4K嘉泰姆
Low Start-up Voltage: 0.85V TypicalQ4K嘉泰姆
1.2MHz Constant Frequency OperationQ4K嘉泰姆
Internal Synchronous RectifierQ4K嘉泰姆
EMI Reduction Anti-Ring Control CircuitryQ4K嘉泰姆
Low Shutdown Current: < 1.0uAQ4K嘉泰姆
Over Current ProtectionQ4K嘉泰姆
Over Temperature ProtectionQ4K嘉泰姆
Light Load PFM Mode OperationQ4K嘉泰姆
SOT23-6 PackageQ4K嘉泰姆
三,应用范围 (Applications)Q4K嘉泰姆
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 Li-ion Battery ChargerQ4K嘉泰姆

 TYPICAL APPLICATIONS
USB AudioQ4K嘉泰姆
Wireless MouseQ4K嘉泰姆
Digital Still CamerasQ4K嘉泰姆
MP3/MP4 PlayersQ4K嘉泰姆
Portable InstrumentsQ4K嘉泰姆
四.技术规格书下载（产品PDF）Q4K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！Q4K嘉泰姆

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五,产品封装图 (Package)Q4K嘉泰姆
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六.电路原理图Q4K嘉泰姆
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七,功能概述Q4K嘉泰姆
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1)General DescriptionQ4K嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.Q4K嘉泰姆
It utilizes internal MOSFET switches to achieve highQ4K嘉泰姆
efficiency over full load current range. It operates at aQ4K嘉泰姆
fixed switching frequency of 1.2MHz, and uses theQ4K嘉泰姆
slope compensated peak current mode pulse widthQ4K嘉泰姆
modulation (PWM) architecture. The device canQ4K嘉泰姆
operate with an input voltage below 1V and theQ4K嘉泰姆
minimum start-up voltage is 0.85V.Q4K嘉泰姆
2) Current Mode Operation Q4K嘉泰姆
The CXSU63034 is based on a slope compensated peakQ4K嘉泰姆
current mode PWM control topology. It operates at aQ4K嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eachQ4K嘉泰姆
clock cycle, the main switch (NMOS) is turned on andQ4K嘉泰姆
the inductor current starts to ramp. After the maximumQ4K嘉泰姆
duty cycle or the sense current signal equals the errorQ4K嘉泰姆
amplifier output, the main switch is turned off and theQ4K嘉泰姆
synchronous switch (PMOS) is turned on. This controlQ4K嘉泰姆
topology features cycle-by-cycle current limiting whichQ4K嘉泰姆
can prevent the main switch from overstress and theQ4K嘉泰姆
external inductor from saturating.Q4K嘉泰姆
3) Synchronous Rectification Q4K嘉泰姆
The CXSU63034 integrates a synchronous rectifier toQ4K嘉泰姆
improve efficiency as well as to eliminate the need forQ4K嘉泰姆
an external Schottky diode. The synchronous rectifier isQ4K嘉泰姆
used to reduce the loss condition contributed by theQ4K嘉泰姆
forward voltage of an external Schottky diode. TheQ4K嘉泰姆
synchronous rectifier is realized by a P-channel MOSQ4K嘉泰姆
(PMOS) with gate control circuitry that incorporatesQ4K嘉泰姆
八,相关芯片选择指南           更多同类产品........    Q4K嘉泰姆

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