目录Jd0嘉泰姆

1.产品概述                       2.产品特点Jd0嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 Jd0嘉泰姆
5.产品封装图                     6.电路原理图                   Jd0嘉泰姆
7.功能概述                        8.相关产品Jd0嘉泰姆

 Jd0嘉泰姆

一,产品概述(General Description)      Jd0嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyJd0嘉泰姆
over a wide output current load range.Jd0嘉泰姆

      This device offers two operation modes,PWM control and PFM ModeJd0嘉泰姆
switching control, which allows a high efficiency over the wider range of theJd0嘉泰姆
load.The  rber of readily available standard external components and isJd0嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.Jd0嘉泰姆

二.产品特点(Features)Jd0嘉泰姆

* High Efficiency: Up to 95%Jd0嘉泰姆
* 600KHz Frequency OperationJd0嘉泰姆
* 2.0A Output CurrentJd0嘉泰姆
* No Schottky Diode RequiredJd0嘉泰姆
* 3.5V to 18V Input Voltage RangeJd0嘉泰姆
* 0.6V ReferenceJd0嘉泰姆
 Slope Compensated Current ModeJd0嘉泰姆
 Control for Excellent Line and LoadJd0嘉泰姆
 Transient ResponseJd0嘉泰姆
* Integrated internal compensationJd0嘉泰姆
* Stable with Low ESR Ceramic OutputJd0嘉泰姆
   CapacitorsJd0嘉泰姆
* Over Current Protection withJd0嘉泰姆
    Hiccup-ModeJd0嘉泰姆
* Input over voltage protection(OVP)Jd0嘉泰姆
*  Thermal ShutdownJd0嘉泰姆
*  Inrush Current Limit and Soft StartJd0嘉泰姆
*  Available in SOT23-6 PackageJd0嘉泰姆
*  -40°C to +85°C Temperature RangeJd0嘉泰姆
三,应用范围 (Applications)Jd0嘉泰姆

Distributed Power SystemsJd0嘉泰姆
Digital Set Top BoxesJd0嘉泰姆
Flat Panel Television and MonitorsJd0嘉泰姆
Wireless and DSL ModemsJd0嘉泰姆
Notebook ComputerJd0嘉泰姆
四.技术规格书下载（产品PDF）Jd0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！Jd0嘉泰姆

 Jd0嘉泰姆

五,产品封装图 (Package)Jd0嘉泰姆

Jd0嘉泰姆
六.电路原理图Jd0嘉泰姆

Jd0嘉泰姆
Jd0嘉泰姆
七,功能概述Jd0嘉泰姆

Internal Regulator Jd0嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentJd0嘉泰姆
transient response with no extra external compensation components. This device containsJd0嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KJd0嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCJd0嘉泰姆
performance.Jd0嘉泰姆

Error AmplifierJd0嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andJd0嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenJd0嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,Jd0嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationJd0嘉泰姆
network minimizes the external component counts and simplifies the control loop design. Jd0嘉泰姆
Internal Soft-StartJd0嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingJd0嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)Jd0嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSJd0嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanJd0嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.Jd0嘉泰姆
Over-Current-Protection and HiccupJd0嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valueJd0嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isJd0嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isJd0嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisJd0嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageJd0嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theJd0嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isJd0嘉泰姆
removed. Jd0嘉泰姆
Startup and Shutdown Jd0嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheJd0嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theJd0嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingJd0嘉泰姆
八,相关芯片选择指南               更多同类产品......Jd0嘉泰姆

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