目录SAC嘉泰姆

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

 SAC嘉泰姆

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

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

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

二.产品特点(Features)SAC嘉泰姆

* High Efficiency: Up to 95%SAC嘉泰姆
* 600KHz Frequency OperationSAC嘉泰姆
* 2.0A Output CurrentSAC嘉泰姆
* No Schottky Diode RequiredSAC嘉泰姆
* 3.5V to 18V Input Voltage RangeSAC嘉泰姆
* 0.6V ReferenceSAC嘉泰姆
 Slope Compensated Current ModeSAC嘉泰姆
 Control for Excellent Line and LoadSAC嘉泰姆
 Transient ResponseSAC嘉泰姆
* Integrated internal compensationSAC嘉泰姆
* Stable with Low ESR Ceramic OutputSAC嘉泰姆
   CapacitorsSAC嘉泰姆
* Over Current Protection withSAC嘉泰姆
    Hiccup-ModeSAC嘉泰姆
* Input over voltage protection(OVP)SAC嘉泰姆
*  Thermal ShutdownSAC嘉泰姆
*  Inrush Current Limit and Soft StartSAC嘉泰姆
*  Available in SOT23-6 PackageSAC嘉泰姆
*  -40°C to +85°C Temperature RangeSAC嘉泰姆
三,应用范围 (Applications)SAC嘉泰姆

Distributed Power SystemsSAC嘉泰姆
Digital Set Top BoxesSAC嘉泰姆
Flat Panel Television and MonitorsSAC嘉泰姆
Wireless and DSL ModemsSAC嘉泰姆
Notebook ComputerSAC嘉泰姆
四.技术规格书下载（产品PDF）SAC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！SAC嘉泰姆

 SAC嘉泰姆

五,产品封装图 (Package)SAC嘉泰姆

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

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

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