CXSU63034 highly efficient fix frequencysynchronous step-up DC/DC converter. Output voltage of the device is adjustable. Power dissipation during operation is only 40μA typical and drops to le

目录lWZ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） 
5.产品封装图</span>   6.电路原理图</span>  7.功能概述      8.相关产品lWZ嘉泰姆

一,产品概述(General Description)      

     The CXSU63034 is a highly efficient fix frequencysynchronous step-up
DC/DC converter. Output voltage of the device is adjustable. Power
dissipation during operation is only 40μA typical and drops to less than
1μA in shutdown. The 0.85V to 5V input voltage range makes the CXSU63034
ideally suitable for single cell Li-ion battery, single or dual AA battery voltage
step-up applications. Automatic PFM Mode operation increases efficiency at
light loads, further extend battery life. Switching frequency is internally set at 1.2MHz, design for use of small value surface mount inductor, input and
output capacitors. The internal synchronous switchesenhance efficiency.
Anti-ringing control circuitry reduces EMI by damping the inductance effect
in DCM mode. The CXSU63034 is available in SOT23-6 package.
二</span>.产品特点(Features)

Input Voltage Operating Range: 0.85V to 5V
Voltage Output Range: 2.5V to 5.5V
Efficiency Up to 94%
3.3V/100mA Output at 1.0V Input
5V/700mA Output at 3.6V Input
Low Start-up Voltage: 0.85V Typical
1.2MHz Constant Frequency Operation
Internal Synchronous Rectifier
EMI Reduction Anti-Ring Control Circuitry
Low Shutdown Current: < 1.0uA
Over Current Protection
Over Temperature Protection
Light Load PFM Mode Operation
SOT23-6 Package
三</span>,应用范围 (Applications)

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 Li-ion Battery ChargerlWZ嘉泰姆

 TYPICAL APPLICATIONS
USB Audio
Wireless Mouse
Digital Still Cameras
MP3/MP4 Players
Portable Instruments
四.技术</span>规格书下载（产品PDF）</span>lWZ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</span>！</span>
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五,产品封装图 (Package)


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六.电路原理图</span>


七</span>,功能概述

1)General Description
The CXSU63034 is a synchronous step-up DC-DC converter.
It utilizes internal MOSFET switches to achieve high
efficiency over full load current range. It operates at a
fixed switching frequency of 1.2MHz, and uses the
slope compensated peak current mode pulse width
modulation (PWM) architecture. The device can
operate with an input voltage below 1V and the
minimum start-up voltage is 0.85V.
2) Current Mode Operation 
The CXSU63034 is based on a slope compensated peak
current mode PWM control topology. It operates at a
fixed frequency of 1.2MHz. At the beginning of each
clock cycle, the main switch (NMOS) is turned on and
the inductor current starts to ramp. After the maximum
duty cycle or the sense current signal equals the error
amplifier output, the main switch is turned off and the
synchronous switch (PMOS) is turned on. This control
topology features cycle-by-cycle current limiting which
can prevent the main switch from overstress and the
external inductor from saturating.
3) Synchronous Rectification 
The CXSU63034 integrates a synchronous rectifier to
improve efficiency as well as to eliminate the need for
an external Schottky diode. The synchronous rectifier is
used to reduce the loss condition contributed by the
forward voltage of an external Schottky diode. The
synchronous rectifier is realized by a P-channel MOS
(PMOS) with gate control circuitry that incorporates
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