目录mBv嘉泰姆

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

 mBv嘉泰姆

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

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

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

二.产品特点(Features)mBv嘉泰姆

* High Efficiency: Up to 95%mBv嘉泰姆
* 600KHz Frequency OperationmBv嘉泰姆
* 2.0A Output CurrentmBv嘉泰姆
* No Schottky Diode RequiredmBv嘉泰姆
* 3.5V to 18V Input Voltage RangemBv嘉泰姆
* 0.6V ReferencemBv嘉泰姆
 Slope Compensated Current ModemBv嘉泰姆
 Control for Excellent Line and LoadmBv嘉泰姆
 Transient ResponsemBv嘉泰姆
* Integrated internal compensationmBv嘉泰姆
* Stable with Low ESR Ceramic OutputmBv嘉泰姆
   CapacitorsmBv嘉泰姆
* Over Current Protection withmBv嘉泰姆
    Hiccup-ModemBv嘉泰姆
* Input over voltage protection(OVP)mBv嘉泰姆
*  Thermal ShutdownmBv嘉泰姆
*  Inrush Current Limit and Soft StartmBv嘉泰姆
*  Available in SOT23-6 PackagemBv嘉泰姆
*  -40°C to +85°C Temperature RangemBv嘉泰姆
三,应用范围 (Applications)mBv嘉泰姆

Distributed Power SystemsmBv嘉泰姆
Digital Set Top BoxesmBv嘉泰姆
Flat Panel Television and MonitorsmBv嘉泰姆
Wireless and DSL ModemsmBv嘉泰姆
Notebook ComputermBv嘉泰姆
四.技术规格书下载（产品PDF）mBv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！mBv嘉泰姆

 mBv嘉泰姆

五,产品封装图 (Package)mBv嘉泰姆

mBv嘉泰姆
六.电路原理图mBv嘉泰姆
mBv嘉泰姆
七,功能概述mBv嘉泰姆

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

Error AmplifiermBv嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andmBv嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenmBv嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,mBv嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationmBv嘉泰姆
network minimizes the external component counts and simplifies the control loop design. mBv嘉泰姆
Internal Soft-StartmBv嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingmBv嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)mBv嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSmBv嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanmBv嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.mBv嘉泰姆
Over-Current-Protection and HiccupmBv嘉泰姆
The JTM2234 has cycle-by-cycle over current limit when the inductor current peak valuemBv嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB ismBv嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV ismBv嘉泰姆
triggered, the JTM2234 enters hiccup mode to periodically restart the part. ThismBv嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagemBv嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect themBv嘉泰姆
regulator. The JTM2234 exits the hiccup mode once the over current condition ismBv嘉泰姆
removed. mBv嘉泰姆
Startup and Shutdown mBv嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. ThemBv嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then themBv嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingmBv嘉泰姆
八,相关芯片选择指南               更多同类产品......mBv嘉泰姆