目录mNA嘉泰姆

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

 mNA嘉泰姆

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

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

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

二.产品特点(Features)mNA嘉泰姆

* High Efficiency: Up to 95%mNA嘉泰姆
* 600KHz Frequency OperationmNA嘉泰姆
* 2.0A Output CurrentmNA嘉泰姆
* No Schottky Diode RequiredmNA嘉泰姆
* 3.5V to 18V Input Voltage RangemNA嘉泰姆
* 0.6V ReferencemNA嘉泰姆
 Slope Compensated Current ModemNA嘉泰姆
 Control for Excellent Line and LoadmNA嘉泰姆
 Transient ResponsemNA嘉泰姆
* Integrated internal compensationmNA嘉泰姆
* Stable with Low ESR Ceramic OutputmNA嘉泰姆
   CapacitorsmNA嘉泰姆
* Over Current Protection withmNA嘉泰姆
    Hiccup-ModemNA嘉泰姆
* Input over voltage protection(OVP)mNA嘉泰姆
*  Thermal ShutdownmNA嘉泰姆
*  Inrush Current Limit and Soft StartmNA嘉泰姆
*  Available in SOT23-6 PackagemNA嘉泰姆
*  -40°C to +85°C Temperature RangemNA嘉泰姆
三,应用范围 (Applications)mNA嘉泰姆

Distributed Power SystemsmNA嘉泰姆
Digital Set Top BoxesmNA嘉泰姆
Flat Panel Television and MonitorsmNA嘉泰姆
Wireless and DSL ModemsmNA嘉泰姆
Notebook ComputermNA嘉泰姆
四.技术规格书下载（产品PDF）mNA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！mNA嘉泰姆

 mNA嘉泰姆

五,产品封装图 (Package)mNA嘉泰姆

mNA嘉泰姆
六.电路原理图mNA嘉泰姆

mNA嘉泰姆
mNA嘉泰姆
七,功能概述mNA嘉泰姆

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

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