CXDC65105同步降压型微型DC变换器感应器和控制IC集成在小封装中输出电流400毫安内置CL放电软启动电路

目录gx0嘉泰姆

1.产品概述                       2.产品特点gx0嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 gx0嘉泰姆
5.产品封装图                     6.电路原理图                   gx0嘉泰姆
7.功能概述                        8.相关产品gx0嘉泰姆

一,产品概述(General Description)      gx0嘉泰姆
gx0嘉泰姆
   The CXDC65105XCL/CXDC65105XCL series is a synchronous step-down micro DC/DC converter whichgx0嘉泰姆
integrates an inductor and  a control IC in one tiny package (2.5mm×2.0mm, h=1.0mm). A stable powergx0嘉泰姆
supply with an output current of 400mA is configured using only two capacitors connected externally.gx0嘉泰姆

Operating voltage range is from 2.0V to 6.0V.
    Output voltage is internally set in a range from 0.8V to 4.0V in increments of 0.05V. The device is operatedgx0嘉泰姆
by 1.2MHz, and includes 0.42ΩP-channel driver transistor and 0.52ΩN-channel switching transistor. As forgx0嘉泰姆
operation mode, the CXDC65105XCL series is PWM control, the CXDC65106XCL series is automatic PWM/PFMgx0嘉泰姆
switching control, allowing fast response, low ripple and high efficiency over the full range of loads (from lightgx0嘉泰姆
load to heavy load).During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μAgx0嘉泰姆
or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFFgx0嘉泰姆
when input voltage becomes 1.4V or lower.The series provide short-time turn-on by the soft start functiongx0嘉泰姆
internally set in 0.25ms (TYP). The series integrate CL auto discharge function which enables the electricgx0嘉泰姆
charge stored at the output capacitor CL to be discharged via the internal auto-discharge switch locatedgx0嘉泰姆
between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly returnsgx0嘉泰姆

to the VSS level as a result of this functiongx0嘉泰姆
二.产品特点(Features)gx0嘉泰姆
gx0嘉泰姆

Ultra Small : 2.5mm×2.0mm, h=1.0mmgx0嘉泰姆

Input Voltage : 2.0V ~ 6.0V gx0嘉泰姆

Output Voltage : 0.8V ~ 4.0V (±2.0%) gx0嘉泰姆

High Efficiency : 92%(VIN=4.2V,VOUT=3.3V)gx0嘉泰姆

Output Current : 400mA gx0嘉泰姆

Oscillation Frequency : 1.2MHz (±15%) gx0嘉泰姆

Maximum Duty Cycle : 100% gx0嘉泰姆

Output Capacitor : Low ESR Ceramic gx0嘉泰姆

Function : Current Limiter Circuit (Constant Current & Latching) gx0嘉泰姆

       Soft-Start Circuit Built-In CL Discharge gx0嘉泰姆

Control Methods : PWM (CXDC65105) gx0嘉泰姆

            PWM/PFM Auto (CXDC65106) gx0嘉泰姆

Operating Ambient Temperature : -40℃～+85℃ gx0嘉泰姆

Environmentally Friendly : EU RoHS Compliant, Pb Freegx0嘉泰姆

三,应用范围 (Applications)gx0嘉泰姆
gx0嘉泰姆
●Mobile phones, Smart phonesgx0嘉泰姆
●Bluetooth Headsetsgx0嘉泰姆
●WiMAX PDAs, MIDs, UMPCsgx0嘉泰姆
●Portable game consolesgx0嘉泰姆
●Digital cameras, Camcordersgx0嘉泰姆
●SSD(Solid State Drive)gx0嘉泰姆
●PND(Portable Navigation Device)gx0嘉泰姆
四.技术规格书下载（产品PDF）gx0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！gx0嘉泰姆

 gx0嘉泰姆

五,产品封装图 (Package)gx0嘉泰姆
gx0嘉泰姆
gx0嘉泰姆
Inductor Electrodesgx0嘉泰姆

六.电路原理图gx0嘉泰姆

gx0嘉泰姆
七,功能概述gx0嘉泰姆

The CXDC65105XCL/CXDC65106XCL series consists of a reference voltage source, ramp wave circuit, error amplifier,gx0嘉泰姆

PWM comparator, phase compensation circuit, output voltage adjustment resistors, P-channel MOSFET drivergx0嘉泰姆
transistor, N-channel MOSFET switching transistor for the synchronous switch, current limiter circuit, UVLO circuitgx0嘉泰姆
with control IC, and an inductor. (See the block diagram below.) Using the error amplifier, the voltage of the internalgx0嘉泰姆
voltage reference source is compared with the feedback voltage from the VOUT pin through split resistors, R1 and R2.gx0嘉泰姆
Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator togx0嘉泰姆
determine the turn-on time during PWM operation. The PWM comparator compares, in terms of voltage level, thegx0嘉泰姆
signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output togx0嘉泰姆
the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performedgx0嘉泰姆
to ensure stable output voltage.The current feedback circuit monitors the P-channel MOS driver transistorgx0嘉泰姆

current for each switching operation, and modulates the error amplifier output signal to provide multiple feedbackgx0嘉泰姆
signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is usedgx0嘉泰姆
ensuring stable output voltagegx0嘉泰姆
八,相关芯片选择指南              更多同类产品.......gx0嘉泰姆
gx0嘉泰姆