目录eqB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） eqB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eqB嘉泰姆

 eqB嘉泰姆

一,产品概述(General Description)      eqB嘉泰姆
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     The CXSU63034 is a highly efficient fix frequencysynchronous step-upeqB嘉泰姆
DC/DC converter. Output voltage of the device is adjustable. PowereqB嘉泰姆
dissipation during operation is only 40μA typical and drops to less thaneqB嘉泰姆
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034eqB嘉泰姆
ideally suitable for single cell Li-ion battery, single or dual AA battery voltageeqB嘉泰姆
step-up applications. Automatic PFM Mode operation increases efficiency ateqB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 andeqB嘉泰姆
output capacitors. The internal synchronous switchesenhance efficiency.eqB嘉泰姆
Anti-ringing control circuitry reduces EMI by damping the inductance effecteqB嘉泰姆
in DCM mode. The CXSU63034 is available in SOT23-6 package.eqB嘉泰姆
二.产品特点(Features)eqB嘉泰姆
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Input Voltage Operating Range: 0.85V to 5VeqB嘉泰姆
Voltage Output Range: 2.5V to 5.5VeqB嘉泰姆
Efficiency Up to 94%eqB嘉泰姆
3.3V/100mA Output at 1.0V InputeqB嘉泰姆
5V/700mA Output at 3.6V InputeqB嘉泰姆
Low Start-up Voltage: 0.85V TypicaleqB嘉泰姆
1.2MHz Constant Frequency OperationeqB嘉泰姆
Internal Synchronous RectifiereqB嘉泰姆
EMI Reduction Anti-Ring Control CircuitryeqB嘉泰姆
Low Shutdown Current: < 1.0uAeqB嘉泰姆
Over Current ProtectioneqB嘉泰姆
Over Temperature ProtectioneqB嘉泰姆
Light Load PFM Mode OperationeqB嘉泰姆
SOT23-6 PackageeqB嘉泰姆
三,应用范围 (Applications)eqB嘉泰姆
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 Li-ion Battery ChargereqB嘉泰姆

 TYPICAL APPLICATIONS
USB AudioeqB嘉泰姆
Wireless MouseeqB嘉泰姆
Digital Still CameraseqB嘉泰姆
MP3/MP4 PlayerseqB嘉泰姆
Portable InstrumentseqB嘉泰姆
四.技术规格书下载（产品PDF）eqB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！eqB嘉泰姆

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五,产品封装图 (Package)eqB嘉泰姆
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eqB嘉泰姆

六.电路原理图eqB嘉泰姆
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七,功能概述eqB嘉泰姆
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1)General DescriptioneqB嘉泰姆
The CXSU63034 is a synchronous step-up DC-DC converter.eqB嘉泰姆
It utilizes internal MOSFET switches to achieve higheqB嘉泰姆
efficiency over full load current range. It operates at aeqB嘉泰姆
fixed switching frequency of 1.2MHz, and uses theeqB嘉泰姆
slope compensated peak current mode pulse widtheqB嘉泰姆
modulation (PWM) architecture. The device caneqB嘉泰姆
operate with an input voltage below 1V and theeqB嘉泰姆
minimum start-up voltage is 0.85V.eqB嘉泰姆
2) Current Mode Operation eqB嘉泰姆
The CXSU63034 is based on a slope compensated peakeqB嘉泰姆
current mode PWM control topology. It operates at aeqB嘉泰姆
fixed frequency of 1.2MHz. At the beginning of eacheqB嘉泰姆
clock cycle, the main switch (NMOS) is turned on andeqB嘉泰姆
the inductor current starts to ramp. After the maximumeqB嘉泰姆
duty cycle or the sense current signal equals the erroreqB嘉泰姆
amplifier output, the main switch is turned off and theeqB嘉泰姆
synchronous switch (PMOS) is turned on. This controleqB嘉泰姆
topology features cycle-by-cycle current limiting whicheqB嘉泰姆
can prevent the main switch from overstress and theeqB嘉泰姆
external inductor from saturating.eqB嘉泰姆
3) Synchronous Rectification eqB嘉泰姆
The CXSU63034 integrates a synchronous rectifier toeqB嘉泰姆
improve efficiency as well as to eliminate the need foreqB嘉泰姆
an external Schottky diode. The synchronous rectifier iseqB嘉泰姆
used to reduce the loss condition contributed by theeqB嘉泰姆
forward voltage of an external Schottky diode. TheeqB嘉泰姆
synchronous rectifier is realized by a P-channel MOSeqB嘉泰姆
(PMOS) with gate control circuitry that incorporateseqB嘉泰姆
八,相关芯片选择指南           更多同类产品........    eqB嘉泰姆

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