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目录MiR嘉泰姆

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

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

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyMiR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 highMiR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.MiR嘉泰姆

二.产品特点(Features)MiR嘉泰姆

* High Efficiency: Up to 95%MiR嘉泰姆
* 600KHz Frequency OperationMiR嘉泰姆
* 2.0A Output CurrentMiR嘉泰姆
* No Schottky Diode RequiredMiR嘉泰姆
* 3.5V to 18V Input Voltage RangeMiR嘉泰姆
* 0.6V ReferenceMiR嘉泰姆
 Slope Compensated Current ModeMiR嘉泰姆
 Control for Excellent Line and LoadMiR嘉泰姆
 Transient ResponseMiR嘉泰姆
* Integrated internal compensationMiR嘉泰姆
* Stable with Low ESR Ceramic OutputMiR嘉泰姆
   CapacitorsMiR嘉泰姆
* Over Current Protection withMiR嘉泰姆
    Hiccup-ModeMiR嘉泰姆
* Input over voltage protection(OVP)MiR嘉泰姆
*  Thermal ShutdownMiR嘉泰姆
*  Inrush Current Limit and Soft StartMiR嘉泰姆
*  Available in SOT23-6 PackageMiR嘉泰姆
*  -40°C to +85°C Temperature RangeMiR嘉泰姆
三,应用范围 (Applications)MiR嘉泰姆

Distributed Power SystemsMiR嘉泰姆
Digital Set Top BoxesMiR嘉泰姆
Flat Panel Television and MonitorsMiR嘉泰姆
Wireless and DSL ModemsMiR嘉泰姆
Notebook ComputerMiR嘉泰姆
四.技术规格书下载（产品PDF）MiR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！MiR嘉泰姆

 MiR嘉泰姆

五,产品封装图 (Package)MiR嘉泰姆

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六.电路原理图MiR嘉泰姆
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七,功能概述MiR嘉泰姆

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

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

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