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目录sqB嘉泰姆

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

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

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencysqB嘉泰姆
over a wide output current load range.This device offers two operation modes,PWM control and PFM Mode switching control, which allows a highsqB嘉泰姆
efficiency over the wider range of the load.The  rber of readily available standard external components and is available in an 6-pin SOT23 ROHS compliant package.sqB嘉泰姆

二.产品特点(Features)sqB嘉泰姆

* High Efficiency: Up to 95%sqB嘉泰姆
* 600KHz Frequency OperationsqB嘉泰姆
* 2.0A Output CurrentsqB嘉泰姆
* No Schottky Diode RequiredsqB嘉泰姆
* 3.5V to 18V Input Voltage RangesqB嘉泰姆
* 0.6V ReferencesqB嘉泰姆
 Slope Compensated Current ModesqB嘉泰姆
 Control for Excellent Line and LoadsqB嘉泰姆
 Transient ResponsesqB嘉泰姆
* Integrated internal compensationsqB嘉泰姆
* Stable with Low ESR Ceramic OutputsqB嘉泰姆
   CapacitorssqB嘉泰姆
* Over Current Protection withsqB嘉泰姆
    Hiccup-ModesqB嘉泰姆
* Input over voltage protection(OVP)sqB嘉泰姆
*  Thermal ShutdownsqB嘉泰姆
*  Inrush Current Limit and Soft StartsqB嘉泰姆
*  Available in SOT23-6 PackagesqB嘉泰姆
*  -40°C to +85°C Temperature RangesqB嘉泰姆
三,应用范围 (Applications)sqB嘉泰姆

Distributed Power SystemssqB嘉泰姆
Digital Set Top BoxessqB嘉泰姆
Flat Panel Television and MonitorssqB嘉泰姆
Wireless and DSL ModemssqB嘉泰姆
Notebook ComputersqB嘉泰姆
四.技术规格书下载（产品PDF）sqB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！sqB嘉泰姆

 sqB嘉泰姆

五,产品封装图 (Package)sqB嘉泰姆

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六.电路原理图sqB嘉泰姆
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七,功能概述sqB嘉泰姆

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

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

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