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目录X2b嘉泰姆

1.产品概述                       2.产品特点X2b嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 X2b嘉泰姆
5.产品封装图                     6.电路原理图                   X2b嘉泰姆
7.功能概述                        8.相关产品X2b嘉泰姆

 X2b嘉泰姆

一,产品概述(General Description)      X2b嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyX2b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 highX2b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.X2b嘉泰姆

二.产品特点(Features)X2b嘉泰姆

* High Efficiency: Up to 95%X2b嘉泰姆
* 600KHz Frequency OperationX2b嘉泰姆
* 2.0A Output CurrentX2b嘉泰姆
* No Schottky Diode RequiredX2b嘉泰姆
* 3.5V to 18V Input Voltage RangeX2b嘉泰姆
* 0.6V ReferenceX2b嘉泰姆
 Slope Compensated Current ModeX2b嘉泰姆
 Control for Excellent Line and LoadX2b嘉泰姆
 Transient ResponseX2b嘉泰姆
* Integrated internal compensationX2b嘉泰姆
* Stable with Low ESR Ceramic OutputX2b嘉泰姆
   CapacitorsX2b嘉泰姆
* Over Current Protection withX2b嘉泰姆
    Hiccup-ModeX2b嘉泰姆
* Input over voltage protection(OVP)X2b嘉泰姆
*  Thermal ShutdownX2b嘉泰姆
*  Inrush Current Limit and Soft StartX2b嘉泰姆
*  Available in SOT23-6 PackageX2b嘉泰姆
*  -40°C to +85°C Temperature RangeX2b嘉泰姆
三,应用范围 (Applications)X2b嘉泰姆

Distributed Power SystemsX2b嘉泰姆
Digital Set Top BoxesX2b嘉泰姆
Flat Panel Television and MonitorsX2b嘉泰姆
Wireless and DSL ModemsX2b嘉泰姆
Notebook ComputerX2b嘉泰姆
四.技术规格书下载（产品PDF）X2b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！X2b嘉泰姆

 X2b嘉泰姆

五,产品封装图 (Package)X2b嘉泰姆

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六.电路原理图X2b嘉泰姆
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七,功能概述X2b嘉泰姆

Internal Regulator X2b嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentX2b嘉泰姆
transient response with no extra external compensation components. This device containsX2b嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KX2b嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCX2b嘉泰姆
performance.X2b嘉泰姆

Error AmplifierX2b嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andX2b嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenX2b嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,X2b嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationX2b嘉泰姆
network minimizes the external component counts and simplifies the control loop design. X2b嘉泰姆
Internal Soft-StartX2b嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingX2b嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)X2b嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSX2b嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanX2b嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.X2b嘉泰姆
Over-Current-Protection and HiccupX2b嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valueX2b嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isX2b嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isX2b嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisX2b嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageX2b嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theX2b嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isX2b嘉泰姆
removed. X2b嘉泰姆
Startup and Shutdown X2b嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheX2b嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theX2b嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingX2b嘉泰姆
八,相关芯片选择指南               更多同类产品......X2b嘉泰姆

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