目录Yh9嘉泰姆

1.产品概述                       2.产品特点Yh9嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 Yh9嘉泰姆
5.产品封装图                     6.电路原理图                   Yh9嘉泰姆
7.功能概述                        8.相关产品Yh9嘉泰姆

 Yh9嘉泰姆

一,产品概述(General Description)      Yh9嘉泰姆

     The CXSD61054   is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054   operates at high efficiencyYh9嘉泰姆
over a wide output current load range.Yh9嘉泰姆

      This device offers two operation modes,PWM control and PFM ModeYh9嘉泰姆
switching control, which allows a high efficiency over the wider range of theYh9嘉泰姆
load.The  rber of readily available standard external components and isYh9嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.Yh9嘉泰姆

二.产品特点(Features)Yh9嘉泰姆

* High Efficiency: Up to 95%Yh9嘉泰姆
* 600KHz Frequency OperationYh9嘉泰姆
* 2.0A Output CurrentYh9嘉泰姆
* No Schottky Diode RequiredYh9嘉泰姆
* 3.5V to 18V Input Voltage RangeYh9嘉泰姆
* 0.6V ReferenceYh9嘉泰姆
 Slope Compensated Current ModeYh9嘉泰姆
 Control for Excellent Line and LoadYh9嘉泰姆
 Transient ResponseYh9嘉泰姆
* Integrated internal compensationYh9嘉泰姆
* Stable with Low ESR Ceramic OutputYh9嘉泰姆
   CapacitorsYh9嘉泰姆
* Over Current Protection withYh9嘉泰姆
    Hiccup-ModeYh9嘉泰姆
* Input over voltage protection(OVP)Yh9嘉泰姆
*  Thermal ShutdownYh9嘉泰姆
*  Inrush Current Limit and Soft StartYh9嘉泰姆
*  Available in SOT23-6 PackageYh9嘉泰姆
*  -40°C to +85°C Temperature RangeYh9嘉泰姆
三,应用范围 (Applications)Yh9嘉泰姆

Distributed Power SystemsYh9嘉泰姆
Digital Set Top BoxesYh9嘉泰姆
Flat Panel Television and MonitorsYh9嘉泰姆
Wireless and DSL ModemsYh9嘉泰姆
Notebook ComputerYh9嘉泰姆
四.技术规格书下载（产品PDF）Yh9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！Yh9嘉泰姆

 Yh9嘉泰姆

五,产品封装图 (Package)Yh9嘉泰姆

Yh9嘉泰姆
六.电路原理图Yh9嘉泰姆
Yh9嘉泰姆
七,功能概述Yh9嘉泰姆

Internal Regulator Yh9嘉泰姆
The CXSD61054   is a current mode step down DC/DC converter that provides excellentYh9嘉泰姆
transient response with no extra external compensation components. This device containsYh9嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KYh9嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCYh9嘉泰姆
performance.Yh9嘉泰姆

Error AmplifierYh9嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andYh9嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenYh9嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,Yh9嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationYh9嘉泰姆
network minimizes the external component counts and simplifies the control loop design. Yh9嘉泰姆
Internal Soft-StartYh9嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingYh9嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)Yh9嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSYh9嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanYh9嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.Yh9嘉泰姆
Over-Current-Protection and HiccupYh9嘉泰姆
The JTM2234 has cycle-by-cycle over current limit when the inductor current peak valueYh9嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isYh9嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isYh9嘉泰姆
triggered, the JTM2234 enters hiccup mode to periodically restart the part. ThisYh9嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageYh9嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theYh9嘉泰姆
regulator. The JTM2234 exits the hiccup mode once the over current condition isYh9嘉泰姆
removed. Yh9嘉泰姆
Startup and Shutdown Yh9嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheYh9嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theYh9嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingYh9嘉泰姆
八,相关芯片选择指南               更多同类产品......Yh9嘉泰姆