目录RRS嘉泰姆

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

 RRS嘉泰姆

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

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

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

二.产品特点(Features)RRS嘉泰姆

* High Efficiency: Up to 95%RRS嘉泰姆
* 600KHz Frequency OperationRRS嘉泰姆
* 2.0A Output CurrentRRS嘉泰姆
* No Schottky Diode RequiredRRS嘉泰姆
* 3.5V to 18V Input Voltage RangeRRS嘉泰姆
* 0.6V ReferenceRRS嘉泰姆
 Slope Compensated Current ModeRRS嘉泰姆
 Control for Excellent Line and LoadRRS嘉泰姆
 Transient ResponseRRS嘉泰姆
* Integrated internal compensationRRS嘉泰姆
* Stable with Low ESR Ceramic OutputRRS嘉泰姆
   CapacitorsRRS嘉泰姆
* Over Current Protection withRRS嘉泰姆
    Hiccup-ModeRRS嘉泰姆
* Input over voltage protection(OVP)RRS嘉泰姆
*  Thermal ShutdownRRS嘉泰姆
*  Inrush Current Limit and Soft StartRRS嘉泰姆
*  Available in SOT23-6 PackageRRS嘉泰姆
*  -40°C to +85°C Temperature RangeRRS嘉泰姆
三,应用范围 (Applications)RRS嘉泰姆

Distributed Power SystemsRRS嘉泰姆
Digital Set Top BoxesRRS嘉泰姆
Flat Panel Television and MonitorsRRS嘉泰姆
Wireless and DSL ModemsRRS嘉泰姆
Notebook ComputerRRS嘉泰姆
四.技术规格书下载（产品PDF）RRS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！RRS嘉泰姆

 RRS嘉泰姆

五,产品封装图 (Package)RRS嘉泰姆

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

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

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

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