目录Hkz嘉泰姆

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

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

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyHkz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 highHkz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.Hkz嘉泰姆

二.产品特点(Features)Hkz嘉泰姆

* High Efficiency: Up to 95%Hkz嘉泰姆
* 600KHz Frequency OperationHkz嘉泰姆
* 2.0A Output CurrentHkz嘉泰姆
* No Schottky Diode RequiredHkz嘉泰姆
* 3.5V to 18V Input Voltage RangeHkz嘉泰姆
* 0.6V ReferenceHkz嘉泰姆
 Slope Compensated Current ModeHkz嘉泰姆
 Control for Excellent Line and LoadHkz嘉泰姆
 Transient ResponseHkz嘉泰姆
* Integrated internal compensationHkz嘉泰姆
* Stable with Low ESR Ceramic OutputHkz嘉泰姆
   CapacitorsHkz嘉泰姆
* Over Current Protection withHkz嘉泰姆
    Hiccup-ModeHkz嘉泰姆
* Input over voltage protection(OVP)Hkz嘉泰姆
*  Thermal ShutdownHkz嘉泰姆
*  Inrush Current Limit and Soft StartHkz嘉泰姆
*  Available in SOT23-6 PackageHkz嘉泰姆
*  -40°C to +85°C Temperature RangeHkz嘉泰姆
三,应用范围 (Applications)Hkz嘉泰姆

Distributed Power SystemsHkz嘉泰姆
Digital Set Top BoxesHkz嘉泰姆
Flat Panel Television and MonitorsHkz嘉泰姆
Wireless and DSL ModemsHkz嘉泰姆
Notebook ComputerHkz嘉泰姆
四.技术规格书下载（产品PDF）Hkz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！Hkz嘉泰姆

 Hkz嘉泰姆

五,产品封装图 (Package)Hkz嘉泰姆

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六.电路原理图Hkz嘉泰姆
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七,功能概述Hkz嘉泰姆

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

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