目录rbu嘉泰姆

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

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

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

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

二.产品特点(Features)rbu嘉泰姆

* High Efficiency: Up to 95%rbu嘉泰姆
* 600KHz Frequency Operationrbu嘉泰姆
* 2.0A Output Currentrbu嘉泰姆
* No Schottky Diode Requiredrbu嘉泰姆
* 3.5V to 18V Input Voltage Rangerbu嘉泰姆
* 0.6V Referencerbu嘉泰姆
 Slope Compensated Current Moderbu嘉泰姆
 Control for Excellent Line and Loadrbu嘉泰姆
 Transient Responserbu嘉泰姆
* Integrated internal compensationrbu嘉泰姆
* Stable with Low ESR Ceramic Outputrbu嘉泰姆
   Capacitorsrbu嘉泰姆
* Over Current Protection withrbu嘉泰姆
    Hiccup-Moderbu嘉泰姆
* Input over voltage protection(OVP)rbu嘉泰姆
*  Thermal Shutdownrbu嘉泰姆
*  Inrush Current Limit and Soft Startrbu嘉泰姆
*  Available in SOT23-6 Packagerbu嘉泰姆
*  -40°C to +85°C Temperature Rangerbu嘉泰姆
三,应用范围 (Applications)rbu嘉泰姆

Distributed Power Systemsrbu嘉泰姆
Digital Set Top Boxesrbu嘉泰姆
Flat Panel Television and Monitorsrbu嘉泰姆
Wireless and DSL Modemsrbu嘉泰姆
Notebook Computerrbu嘉泰姆
四.技术规格书下载（产品PDF）rbu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！rbu嘉泰姆

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五,产品封装图 (Package)rbu嘉泰姆

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六.电路原理图rbu嘉泰姆

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七,功能概述rbu嘉泰姆

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

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