目录ekm嘉泰姆

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

 ekm嘉泰姆

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

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

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

二.产品特点(Features)ekm嘉泰姆

* High Efficiency: Up to 95%ekm嘉泰姆
* 600KHz Frequency Operationekm嘉泰姆
* 2.0A Output Currentekm嘉泰姆
* No Schottky Diode Requiredekm嘉泰姆
* 3.5V to 18V Input Voltage Rangeekm嘉泰姆
* 0.6V Referenceekm嘉泰姆
 Slope Compensated Current Modeekm嘉泰姆
 Control for Excellent Line and Loadekm嘉泰姆
 Transient Responseekm嘉泰姆
* Integrated internal compensationekm嘉泰姆
* Stable with Low ESR Ceramic Outputekm嘉泰姆
   Capacitorsekm嘉泰姆
* Over Current Protection withekm嘉泰姆
    Hiccup-Modeekm嘉泰姆
* Input over voltage protection(OVP)ekm嘉泰姆
*  Thermal Shutdownekm嘉泰姆
*  Inrush Current Limit and Soft Startekm嘉泰姆
*  Available in SOT23-6 Packageekm嘉泰姆
*  -40°C to +85°C Temperature Rangeekm嘉泰姆
三,应用范围 (Applications)ekm嘉泰姆

Distributed Power Systemsekm嘉泰姆
Digital Set Top Boxesekm嘉泰姆
Flat Panel Television and Monitorsekm嘉泰姆
Wireless and DSL Modemsekm嘉泰姆
Notebook Computerekm嘉泰姆
四.技术规格书下载（产品PDF）ekm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！ekm嘉泰姆

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五,产品封装图 (Package)ekm嘉泰姆

ekm嘉泰姆
六.电路原理图ekm嘉泰姆

ekm嘉泰姆
ekm嘉泰姆
七,功能概述ekm嘉泰姆

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

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