目录cye嘉泰姆

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

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

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

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

二.产品特点(Features)cye嘉泰姆

* High Efficiency: Up to 95%cye嘉泰姆
* 600KHz Frequency Operationcye嘉泰姆
* 2.0A Output Currentcye嘉泰姆
* No Schottky Diode Requiredcye嘉泰姆
* 3.5V to 18V Input Voltage Rangecye嘉泰姆
* 0.6V Referencecye嘉泰姆
 Slope Compensated Current Modecye嘉泰姆
 Control for Excellent Line and Loadcye嘉泰姆
 Transient Responsecye嘉泰姆
* Integrated internal compensationcye嘉泰姆
* Stable with Low ESR Ceramic Outputcye嘉泰姆
   Capacitorscye嘉泰姆
* Over Current Protection withcye嘉泰姆
    Hiccup-Modecye嘉泰姆
* Input over voltage protection(OVP)cye嘉泰姆
*  Thermal Shutdowncye嘉泰姆
*  Inrush Current Limit and Soft Startcye嘉泰姆
*  Available in SOT23-6 Packagecye嘉泰姆
*  -40°C to +85°C Temperature Rangecye嘉泰姆
三,应用范围 (Applications)cye嘉泰姆

Distributed Power Systemscye嘉泰姆
Digital Set Top Boxescye嘉泰姆
Flat Panel Television and Monitorscye嘉泰姆
Wireless and DSL Modemscye嘉泰姆
Notebook Computercye嘉泰姆
四.技术规格书下载（产品PDF）cye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！cye嘉泰姆

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五,产品封装图 (Package)cye嘉泰姆

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六.电路原理图cye嘉泰姆

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七,功能概述cye嘉泰姆

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

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