目录mvg嘉泰姆

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

 mvg嘉泰姆

一,产品概述(General Description)      mvg嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencymvg嘉泰姆
over a wide output current load range.mvg嘉泰姆

      This device offers two operation modes,PWM control and PFM Modemvg嘉泰姆
switching control, which allows a high efficiency over the wider range of themvg嘉泰姆
load.The  rber of readily available standard external components and ismvg嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.mvg嘉泰姆

二.产品特点(Features)mvg嘉泰姆

* High Efficiency: Up to 95%mvg嘉泰姆
* 600KHz Frequency Operationmvg嘉泰姆
* 2.0A Output Currentmvg嘉泰姆
* No Schottky Diode Requiredmvg嘉泰姆
* 3.5V to 18V Input Voltage Rangemvg嘉泰姆
* 0.6V Referencemvg嘉泰姆
 Slope Compensated Current Modemvg嘉泰姆
 Control for Excellent Line and Loadmvg嘉泰姆
 Transient Responsemvg嘉泰姆
* Integrated internal compensationmvg嘉泰姆
* Stable with Low ESR Ceramic Outputmvg嘉泰姆
   Capacitorsmvg嘉泰姆
* Over Current Protection withmvg嘉泰姆
    Hiccup-Modemvg嘉泰姆
* Input over voltage protection(OVP)mvg嘉泰姆
*  Thermal Shutdownmvg嘉泰姆
*  Inrush Current Limit and Soft Startmvg嘉泰姆
*  Available in SOT23-6 Packagemvg嘉泰姆
*  -40°C to +85°C Temperature Rangemvg嘉泰姆
三,应用范围 (Applications)mvg嘉泰姆

Distributed Power Systemsmvg嘉泰姆
Digital Set Top Boxesmvg嘉泰姆
Flat Panel Television and Monitorsmvg嘉泰姆
Wireless and DSL Modemsmvg嘉泰姆
Notebook Computermvg嘉泰姆
四.技术规格书下载（产品PDF）mvg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！mvg嘉泰姆

 mvg嘉泰姆

五,产品封装图 (Package)mvg嘉泰姆

mvg嘉泰姆
六.电路原理图mvg嘉泰姆

mvg嘉泰姆
mvg嘉泰姆
七,功能概述mvg嘉泰姆

Internal Regulator mvg嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentmvg嘉泰姆
transient response with no extra external compensation components. This device containsmvg嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600Kmvg嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCmvg嘉泰姆
performance.mvg嘉泰姆

Error Amplifiermvg嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andmvg嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenmvg嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,mvg嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationmvg嘉泰姆
network minimizes the external component counts and simplifies the control loop design. mvg嘉泰姆
Internal Soft-Startmvg嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingmvg嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)mvg嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSmvg嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanmvg嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.mvg嘉泰姆
Over-Current-Protection and Hiccupmvg嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuemvg嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB ismvg嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV ismvg嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. Thismvg嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagemvg嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect themvg嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition ismvg嘉泰姆
removed. mvg嘉泰姆
Startup and Shutdown mvg嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Themvg嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then themvg嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingmvg嘉泰姆
八,相关芯片选择指南               更多同类产品......mvg嘉泰姆