目录WOF嘉泰姆

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

 WOF嘉泰姆

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

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

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

二.产品特点(Features)WOF嘉泰姆

* High Efficiency: Up to 95%WOF嘉泰姆
* 600KHz Frequency OperationWOF嘉泰姆
* 2.0A Output CurrentWOF嘉泰姆
* No Schottky Diode RequiredWOF嘉泰姆
* 3.5V to 18V Input Voltage RangeWOF嘉泰姆
* 0.6V ReferenceWOF嘉泰姆
 Slope Compensated Current ModeWOF嘉泰姆
 Control for Excellent Line and LoadWOF嘉泰姆
 Transient ResponseWOF嘉泰姆
* Integrated internal compensationWOF嘉泰姆
* Stable with Low ESR Ceramic OutputWOF嘉泰姆
   CapacitorsWOF嘉泰姆
* Over Current Protection withWOF嘉泰姆
    Hiccup-ModeWOF嘉泰姆
* Input over voltage protection(OVP)WOF嘉泰姆
*  Thermal ShutdownWOF嘉泰姆
*  Inrush Current Limit and Soft StartWOF嘉泰姆
*  Available in SOT23-6 PackageWOF嘉泰姆
*  -40°C to +85°C Temperature RangeWOF嘉泰姆
三,应用范围 (Applications)WOF嘉泰姆

Distributed Power SystemsWOF嘉泰姆
Digital Set Top BoxesWOF嘉泰姆
Flat Panel Television and MonitorsWOF嘉泰姆
Wireless and DSL ModemsWOF嘉泰姆
Notebook ComputerWOF嘉泰姆
四.技术规格书下载（产品PDF）WOF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！WOF嘉泰姆

 WOF嘉泰姆

五,产品封装图 (Package)WOF嘉泰姆

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六.电路原理图WOF嘉泰姆

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七,功能概述WOF嘉泰姆

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

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