目录eoc嘉泰姆

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

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

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

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

二.产品特点(Features)eoc嘉泰姆

* High Efficiency: Up to 95%eoc嘉泰姆
* 600KHz Frequency Operationeoc嘉泰姆
* 2.0A Output Currenteoc嘉泰姆
* No Schottky Diode Requiredeoc嘉泰姆
* 3.5V to 18V Input Voltage Rangeeoc嘉泰姆
* 0.6V Referenceeoc嘉泰姆
 Slope Compensated Current Modeeoc嘉泰姆
 Control for Excellent Line and Loadeoc嘉泰姆
 Transient Responseeoc嘉泰姆
* Integrated internal compensationeoc嘉泰姆
* Stable with Low ESR Ceramic Outputeoc嘉泰姆
   Capacitorseoc嘉泰姆
* Over Current Protection witheoc嘉泰姆
    Hiccup-Modeeoc嘉泰姆
* Input over voltage protection(OVP)eoc嘉泰姆
*  Thermal Shutdowneoc嘉泰姆
*  Inrush Current Limit and Soft Starteoc嘉泰姆
*  Available in SOT23-6 Packageeoc嘉泰姆
*  -40°C to +85°C Temperature Rangeeoc嘉泰姆
三,应用范围 (Applications)eoc嘉泰姆

Distributed Power Systemseoc嘉泰姆
Digital Set Top Boxeseoc嘉泰姆
Flat Panel Television and Monitorseoc嘉泰姆
Wireless and DSL Modemseoc嘉泰姆
Notebook Computereoc嘉泰姆
四.技术规格书下载（产品PDF）eoc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！eoc嘉泰姆

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五,产品封装图 (Package)eoc嘉泰姆

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六.电路原理图eoc嘉泰姆

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七,功能概述eoc嘉泰姆

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

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