目录qu2嘉泰姆

1.产品概述                       2.产品特点qu2嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 qu2嘉泰姆
5.产品封装图                     6.电路原理图                   qu2嘉泰姆
7.功能概述                        8.相关产品qu2嘉泰姆

 qu2嘉泰姆

一,产品概述(General Description)      qu2嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyqu2嘉泰姆
over a wide output current load range.qu2嘉泰姆

      This device offers two operation modes,PWM control and PFM Modequ2嘉泰姆
switching control, which allows a high efficiency over the wider range of thequ2嘉泰姆
load.The  rber of readily available standard external components and isqu2嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.qu2嘉泰姆

二.产品特点(Features)qu2嘉泰姆

* High Efficiency: Up to 95%qu2嘉泰姆
* 600KHz Frequency Operationqu2嘉泰姆
* 2.0A Output Currentqu2嘉泰姆
* No Schottky Diode Requiredqu2嘉泰姆
* 3.5V to 18V Input Voltage Rangequ2嘉泰姆
* 0.6V Referencequ2嘉泰姆
 Slope Compensated Current Modequ2嘉泰姆
 Control for Excellent Line and Loadqu2嘉泰姆
 Transient Responsequ2嘉泰姆
* Integrated internal compensationqu2嘉泰姆
* Stable with Low ESR Ceramic Outputqu2嘉泰姆
   Capacitorsqu2嘉泰姆
* Over Current Protection withqu2嘉泰姆
    Hiccup-Modequ2嘉泰姆
* Input over voltage protection(OVP)qu2嘉泰姆
*  Thermal Shutdownqu2嘉泰姆
*  Inrush Current Limit and Soft Startqu2嘉泰姆
*  Available in SOT23-6 Packagequ2嘉泰姆
*  -40°C to +85°C Temperature Rangequ2嘉泰姆
三,应用范围 (Applications)qu2嘉泰姆

Distributed Power Systemsqu2嘉泰姆
Digital Set Top Boxesqu2嘉泰姆
Flat Panel Television and Monitorsqu2嘉泰姆
Wireless and DSL Modemsqu2嘉泰姆
Notebook Computerqu2嘉泰姆
四.技术规格书下载（产品PDF）qu2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！qu2嘉泰姆

 qu2嘉泰姆

五,产品封装图 (Package)qu2嘉泰姆

qu2嘉泰姆
六.电路原理图qu2嘉泰姆

qu2嘉泰姆
qu2嘉泰姆
七,功能概述qu2嘉泰姆

Internal Regulator qu2嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentqu2嘉泰姆
transient response with no extra external compensation components. This device containsqu2嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600Kqu2嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCqu2嘉泰姆
performance.qu2嘉泰姆

Error Amplifierqu2嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andqu2嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenqu2嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,qu2嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationqu2嘉泰姆
network minimizes the external component counts and simplifies the control loop design. qu2嘉泰姆
Internal Soft-Startqu2嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingqu2嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)qu2嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSqu2嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanqu2嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.qu2嘉泰姆
Over-Current-Protection and Hiccupqu2嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuequ2嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isqu2嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isqu2嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. Thisqu2嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagequ2嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thequ2嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isqu2嘉泰姆
removed. qu2嘉泰姆
Startup and Shutdown qu2嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Thequ2嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thequ2嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingqu2嘉泰姆
八,相关芯片选择指南               更多同类产品......qu2嘉泰姆