目录Shp嘉泰姆

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

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

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

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

二.产品特点(Features)Shp嘉泰姆

* High Efficiency: Up to 95%Shp嘉泰姆
* 600KHz Frequency OperationShp嘉泰姆
* 2.0A Output CurrentShp嘉泰姆
* No Schottky Diode RequiredShp嘉泰姆
* 3.5V to 18V Input Voltage RangeShp嘉泰姆
* 0.6V ReferenceShp嘉泰姆
 Slope Compensated Current ModeShp嘉泰姆
 Control for Excellent Line and LoadShp嘉泰姆
 Transient ResponseShp嘉泰姆
* Integrated internal compensationShp嘉泰姆
* Stable with Low ESR Ceramic OutputShp嘉泰姆
   CapacitorsShp嘉泰姆
* Over Current Protection withShp嘉泰姆
    Hiccup-ModeShp嘉泰姆
* Input over voltage protection(OVP)Shp嘉泰姆
*  Thermal ShutdownShp嘉泰姆
*  Inrush Current Limit and Soft StartShp嘉泰姆
*  Available in SOT23-6 PackageShp嘉泰姆
*  -40°C to +85°C Temperature RangeShp嘉泰姆
三,应用范围 (Applications)Shp嘉泰姆

Distributed Power SystemsShp嘉泰姆
Digital Set Top BoxesShp嘉泰姆
Flat Panel Television and MonitorsShp嘉泰姆
Wireless and DSL ModemsShp嘉泰姆
Notebook ComputerShp嘉泰姆
四.技术规格书下载（产品PDF）Shp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！Shp嘉泰姆

 Shp嘉泰姆

五,产品封装图 (Package)Shp嘉泰姆

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六.电路原理图Shp嘉泰姆

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七,功能概述Shp嘉泰姆

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

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