CXSD61054 fully in tegrated , high-efficiency 2.0A synchronous rectified step-down converter hi

目录pRU嘉泰姆

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

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

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

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

二.产品特点(Features)pRU嘉泰姆

* High Efficiency: Up to 95%pRU嘉泰姆
* 600KHz Frequency OperationpRU嘉泰姆
* 2.0A Output CurrentpRU嘉泰姆
* No Schottky Diode RequiredpRU嘉泰姆
* 3.5V to 18V Input Voltage RangepRU嘉泰姆
* 0.6V ReferencepRU嘉泰姆
 Slope Compensated Current ModepRU嘉泰姆
 Control for Excellent Line and LoadpRU嘉泰姆
 Transient ResponsepRU嘉泰姆
* Integrated internal compensationpRU嘉泰姆
* Stable with Low ESR Ceramic OutputpRU嘉泰姆
   CapacitorspRU嘉泰姆
* Over Current Protection withpRU嘉泰姆
    Hiccup-ModepRU嘉泰姆
* Input over voltage protection(OVP)pRU嘉泰姆
*  Thermal ShutdownpRU嘉泰姆
*  Inrush Current Limit and Soft StartpRU嘉泰姆
*  Available in SOT23-6 PackagepRU嘉泰姆
*  -40°C to +85°C Temperature RangepRU嘉泰姆
三,应用范围 (Applications)pRU嘉泰姆

Distributed Power SystemspRU嘉泰姆
Digital Set Top BoxespRU嘉泰姆
Flat Panel Television and MonitorspRU嘉泰姆
Wireless and DSL ModemspRU嘉泰姆
Notebook ComputerpRU嘉泰姆
四.技术规格书下载（产品PDF）pRU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！pRU嘉泰姆

 pRU嘉泰姆

五,产品封装图 (Package)pRU嘉泰姆

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六.电路原理图pRU嘉泰姆

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七,功能概述pRU嘉泰姆

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

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