目录Rez嘉泰姆

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

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

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

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

二.产品特点(Features)Rez嘉泰姆

* High Efficiency: Up to 95%Rez嘉泰姆
* 600KHz Frequency OperationRez嘉泰姆
* 2.0A Output CurrentRez嘉泰姆
* No Schottky Diode RequiredRez嘉泰姆
* 3.5V to 18V Input Voltage RangeRez嘉泰姆
* 0.6V ReferenceRez嘉泰姆
 Slope Compensated Current ModeRez嘉泰姆
 Control for Excellent Line and LoadRez嘉泰姆
 Transient ResponseRez嘉泰姆
* Integrated internal compensationRez嘉泰姆
* Stable with Low ESR Ceramic OutputRez嘉泰姆
   CapacitorsRez嘉泰姆
* Over Current Protection withRez嘉泰姆
    Hiccup-ModeRez嘉泰姆
* Input over voltage protection(OVP)Rez嘉泰姆
*  Thermal ShutdownRez嘉泰姆
*  Inrush Current Limit and Soft StartRez嘉泰姆
*  Available in SOT23-6 PackageRez嘉泰姆
*  -40°C to +85°C Temperature RangeRez嘉泰姆
三,应用范围 (Applications)Rez嘉泰姆

Distributed Power SystemsRez嘉泰姆
Digital Set Top BoxesRez嘉泰姆
Flat Panel Television and MonitorsRez嘉泰姆
Wireless and DSL ModemsRez嘉泰姆
Notebook ComputerRez嘉泰姆
四.技术规格书下载（产品PDF）Rez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！Rez嘉泰姆

 Rez嘉泰姆

五,产品封装图 (Package)Rez嘉泰姆

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六.电路原理图Rez嘉泰姆

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七,功能概述Rez嘉泰姆

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

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