目录QEl嘉泰姆

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

 QEl嘉泰姆

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

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

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

二.产品特点(Features)QEl嘉泰姆

* High Efficiency: Up to 95%QEl嘉泰姆
* 600KHz Frequency OperationQEl嘉泰姆
* 2.0A Output CurrentQEl嘉泰姆
* No Schottky Diode RequiredQEl嘉泰姆
* 3.5V to 18V Input Voltage RangeQEl嘉泰姆
* 0.6V ReferenceQEl嘉泰姆
 Slope Compensated Current ModeQEl嘉泰姆
 Control for Excellent Line and LoadQEl嘉泰姆
 Transient ResponseQEl嘉泰姆
* Integrated internal compensationQEl嘉泰姆
* Stable with Low ESR Ceramic OutputQEl嘉泰姆
   CapacitorsQEl嘉泰姆
* Over Current Protection withQEl嘉泰姆
    Hiccup-ModeQEl嘉泰姆
* Input over voltage protection(OVP)QEl嘉泰姆
*  Thermal ShutdownQEl嘉泰姆
*  Inrush Current Limit and Soft StartQEl嘉泰姆
*  Available in SOT23-6 PackageQEl嘉泰姆
*  -40°C to +85°C Temperature RangeQEl嘉泰姆
三,应用范围 (Applications)QEl嘉泰姆

Distributed Power SystemsQEl嘉泰姆
Digital Set Top BoxesQEl嘉泰姆
Flat Panel Television and MonitorsQEl嘉泰姆
Wireless and DSL ModemsQEl嘉泰姆
Notebook ComputerQEl嘉泰姆
四.技术规格书下载（产品PDF）QEl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！QEl嘉泰姆

 QEl嘉泰姆

五,产品封装图 (Package)QEl嘉泰姆

QEl嘉泰姆
六.电路原理图QEl嘉泰姆

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七,功能概述QEl嘉泰姆

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

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