目录H2I嘉泰姆

1.产品概述                       2.产品特点H2I嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 H2I嘉泰姆
5.产品封装图                     6.电路原理图                   H2I嘉泰姆
7.功能概述                        8.相关产品H2I嘉泰姆

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一,产品概述(General Description)      H2I嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyH2I嘉泰姆
over a wide output current load range.H2I嘉泰姆

      This device offers two operation modes,PWM control and PFM ModeH2I嘉泰姆
switching control, which allows a high efficiency over the wider range of theH2I嘉泰姆
load.The  rber of readily available standard external components and isH2I嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.H2I嘉泰姆

二.产品特点(Features)H2I嘉泰姆

* High Efficiency: Up to 95%H2I嘉泰姆
* 600KHz Frequency OperationH2I嘉泰姆
* 2.0A Output CurrentH2I嘉泰姆
* No Schottky Diode RequiredH2I嘉泰姆
* 3.5V to 18V Input Voltage RangeH2I嘉泰姆
* 0.6V ReferenceH2I嘉泰姆
 Slope Compensated Current ModeH2I嘉泰姆
 Control for Excellent Line and LoadH2I嘉泰姆
 Transient ResponseH2I嘉泰姆
* Integrated internal compensationH2I嘉泰姆
* Stable with Low ESR Ceramic OutputH2I嘉泰姆
   CapacitorsH2I嘉泰姆
* Over Current Protection withH2I嘉泰姆
    Hiccup-ModeH2I嘉泰姆
* Input over voltage protection(OVP)H2I嘉泰姆
*  Thermal ShutdownH2I嘉泰姆
*  Inrush Current Limit and Soft StartH2I嘉泰姆
*  Available in SOT23-6 PackageH2I嘉泰姆
*  -40°C to +85°C Temperature RangeH2I嘉泰姆
三,应用范围 (Applications)H2I嘉泰姆

Distributed Power SystemsH2I嘉泰姆
Digital Set Top BoxesH2I嘉泰姆
Flat Panel Television and MonitorsH2I嘉泰姆
Wireless and DSL ModemsH2I嘉泰姆
Notebook ComputerH2I嘉泰姆
四.技术规格书下载（产品PDF）H2I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！H2I嘉泰姆

 H2I嘉泰姆

五,产品封装图 (Package)H2I嘉泰姆

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六.电路原理图H2I嘉泰姆

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七,功能概述H2I嘉泰姆

Internal Regulator H2I嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentH2I嘉泰姆
transient response with no extra external compensation components. This device containsH2I嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KH2I嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCH2I嘉泰姆
performance.H2I嘉泰姆

Error AmplifierH2I嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andH2I嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenH2I嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,H2I嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationH2I嘉泰姆
network minimizes the external component counts and simplifies the control loop design. H2I嘉泰姆
Internal Soft-StartH2I嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingH2I嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)H2I嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSH2I嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanH2I嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.H2I嘉泰姆
Over-Current-Protection and HiccupH2I嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valueH2I嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isH2I嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isH2I嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisH2I嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageH2I嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theH2I嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isH2I嘉泰姆
removed. H2I嘉泰姆
Startup and Shutdown H2I嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheH2I嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theH2I嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingH2I嘉泰姆
八,相关芯片选择指南               更多同类产品......H2I嘉泰姆