目录IIf嘉泰姆

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

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

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

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

二.产品特点(Features)IIf嘉泰姆

* High Efficiency: Up to 95%IIf嘉泰姆
* 600KHz Frequency OperationIIf嘉泰姆
* 2.0A Output CurrentIIf嘉泰姆
* No Schottky Diode RequiredIIf嘉泰姆
* 3.5V to 18V Input Voltage RangeIIf嘉泰姆
* 0.6V ReferenceIIf嘉泰姆
 Slope Compensated Current ModeIIf嘉泰姆
 Control for Excellent Line and LoadIIf嘉泰姆
 Transient ResponseIIf嘉泰姆
* Integrated internal compensationIIf嘉泰姆
* Stable with Low ESR Ceramic OutputIIf嘉泰姆
   CapacitorsIIf嘉泰姆
* Over Current Protection withIIf嘉泰姆
    Hiccup-ModeIIf嘉泰姆
* Input over voltage protection(OVP)IIf嘉泰姆
*  Thermal ShutdownIIf嘉泰姆
*  Inrush Current Limit and Soft StartIIf嘉泰姆
*  Available in SOT23-6 PackageIIf嘉泰姆
*  -40°C to +85°C Temperature RangeIIf嘉泰姆
三,应用范围 (Applications)IIf嘉泰姆

Distributed Power SystemsIIf嘉泰姆
Digital Set Top BoxesIIf嘉泰姆
Flat Panel Television and MonitorsIIf嘉泰姆
Wireless and DSL ModemsIIf嘉泰姆
Notebook ComputerIIf嘉泰姆
四.技术规格书下载（产品PDF）IIf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！IIf嘉泰姆

 IIf嘉泰姆

五,产品封装图 (Package)IIf嘉泰姆

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六.电路原理图IIf嘉泰姆

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七,功能概述IIf嘉泰姆

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

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

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