CXSD61054 fully in tegrated , high-efficiency 2.0A synchronous rectified step-down converter hi

目录lN5嘉泰姆

1.产品概述                       2.产品特点lN5嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 lN5嘉泰姆
5.产品封装图                     6.电路原理图                   lN5嘉泰姆
7.功能概述                        8.相关产品lN5嘉泰姆

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一,产品概述(General Description)      lN5嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencylN5嘉泰姆
over a wide output current load range.lN5嘉泰姆

      This device offers two operation modes,PWM control and PFM ModelN5嘉泰姆
switching control, which allows a high efficiency over the wider range of thelN5嘉泰姆
load.The  rber of readily available standard external components and islN5嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.lN5嘉泰姆

二.产品特点(Features)lN5嘉泰姆

* High Efficiency: Up to 95%lN5嘉泰姆
* 600KHz Frequency OperationlN5嘉泰姆
* 2.0A Output CurrentlN5嘉泰姆
* No Schottky Diode RequiredlN5嘉泰姆
* 3.5V to 18V Input Voltage RangelN5嘉泰姆
* 0.6V ReferencelN5嘉泰姆
 Slope Compensated Current ModelN5嘉泰姆
 Control for Excellent Line and LoadlN5嘉泰姆
 Transient ResponselN5嘉泰姆
* Integrated internal compensationlN5嘉泰姆
* Stable with Low ESR Ceramic OutputlN5嘉泰姆
   CapacitorslN5嘉泰姆
* Over Current Protection withlN5嘉泰姆
    Hiccup-ModelN5嘉泰姆
* Input over voltage protection(OVP)lN5嘉泰姆
*  Thermal ShutdownlN5嘉泰姆
*  Inrush Current Limit and Soft StartlN5嘉泰姆
*  Available in SOT23-6 PackagelN5嘉泰姆
*  -40°C to +85°C Temperature RangelN5嘉泰姆
三,应用范围 (Applications)lN5嘉泰姆

Distributed Power SystemslN5嘉泰姆
Digital Set Top BoxeslN5嘉泰姆
Flat Panel Television and MonitorslN5嘉泰姆
Wireless and DSL ModemslN5嘉泰姆
Notebook ComputerlN5嘉泰姆
四.技术规格书下载（产品PDF）lN5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！lN5嘉泰姆

 lN5嘉泰姆

五,产品封装图 (Package)lN5嘉泰姆

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六.电路原理图lN5嘉泰姆

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七,功能概述lN5嘉泰姆

Internal Regulator lN5嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentlN5嘉泰姆
transient response with no extra external compensation components. This device containslN5嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KlN5嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DClN5嘉泰姆
performance.lN5嘉泰姆

Error AmplifierlN5嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andlN5嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenlN5嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,lN5嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationlN5嘉泰姆
network minimizes the external component counts and simplifies the control loop design. lN5嘉泰姆
Internal Soft-StartlN5嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootinglN5嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)lN5嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSlN5嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanlN5嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.lN5嘉泰姆
Over-Current-Protection and HiccuplN5嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuelN5嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB islN5嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV islN5嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThislN5嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagelN5嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thelN5嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition islN5嘉泰姆
removed. lN5嘉泰姆
Startup and Shutdown lN5嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. ThelN5嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thelN5嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remaininglN5嘉泰姆
八,相关芯片选择指南               更多同类产品......lN5嘉泰姆