目录Nsm嘉泰姆

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

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

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

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

二.产品特点(Features)Nsm嘉泰姆

* High Efficiency: Up to 95%Nsm嘉泰姆
* 600KHz Frequency OperationNsm嘉泰姆
* 2.0A Output CurrentNsm嘉泰姆
* No Schottky Diode RequiredNsm嘉泰姆
* 3.5V to 18V Input Voltage RangeNsm嘉泰姆
* 0.6V ReferenceNsm嘉泰姆
 Slope Compensated Current ModeNsm嘉泰姆
 Control for Excellent Line and LoadNsm嘉泰姆
 Transient ResponseNsm嘉泰姆
* Integrated internal compensationNsm嘉泰姆
* Stable with Low ESR Ceramic OutputNsm嘉泰姆
   CapacitorsNsm嘉泰姆
* Over Current Protection withNsm嘉泰姆
    Hiccup-ModeNsm嘉泰姆
* Input over voltage protection(OVP)Nsm嘉泰姆
*  Thermal ShutdownNsm嘉泰姆
*  Inrush Current Limit and Soft StartNsm嘉泰姆
*  Available in SOT23-6 PackageNsm嘉泰姆
*  -40°C to +85°C Temperature RangeNsm嘉泰姆
三,应用范围 (Applications)Nsm嘉泰姆

Distributed Power SystemsNsm嘉泰姆
Digital Set Top BoxesNsm嘉泰姆
Flat Panel Television and MonitorsNsm嘉泰姆
Wireless and DSL ModemsNsm嘉泰姆
Notebook ComputerNsm嘉泰姆
四.技术规格书下载（产品PDF）Nsm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！Nsm嘉泰姆

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五,产品封装图 (Package)Nsm嘉泰姆

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六.电路原理图Nsm嘉泰姆

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七,功能概述Nsm嘉泰姆

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

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