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目录hDd嘉泰姆

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

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

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

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

二.产品特点(Features)hDd嘉泰姆

* High Efficiency: Up to 95%hDd嘉泰姆
* 600KHz Frequency OperationhDd嘉泰姆
* 2.0A Output CurrenthDd嘉泰姆
* No Schottky Diode RequiredhDd嘉泰姆
* 3.5V to 18V Input Voltage RangehDd嘉泰姆
* 0.6V ReferencehDd嘉泰姆
 Slope Compensated Current ModehDd嘉泰姆
 Control for Excellent Line and LoadhDd嘉泰姆
 Transient ResponsehDd嘉泰姆
* Integrated internal compensationhDd嘉泰姆
* Stable with Low ESR Ceramic OutputhDd嘉泰姆
   CapacitorshDd嘉泰姆
* Over Current Protection withhDd嘉泰姆
    Hiccup-ModehDd嘉泰姆
* Input over voltage protection(OVP)hDd嘉泰姆
*  Thermal ShutdownhDd嘉泰姆
*  Inrush Current Limit and Soft StarthDd嘉泰姆
*  Available in SOT23-6 PackagehDd嘉泰姆
*  -40°C to +85°C Temperature RangehDd嘉泰姆
三,应用范围 (Applications)hDd嘉泰姆

Distributed Power SystemshDd嘉泰姆
Digital Set Top BoxeshDd嘉泰姆
Flat Panel Television and MonitorshDd嘉泰姆
Wireless and DSL ModemshDd嘉泰姆
Notebook ComputerhDd嘉泰姆
四.技术规格书下载（产品PDF）hDd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！hDd嘉泰姆

 hDd嘉泰姆

五,产品封装图 (Package)hDd嘉泰姆

hDd嘉泰姆
六.电路原理图hDd嘉泰姆

hDd嘉泰姆
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七,功能概述hDd嘉泰姆

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

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

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