目录DB3嘉泰姆

1.产品概述                       2.产品特点DB3嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 DB3嘉泰姆
5.产品封装图                     6.电路原理图                   DB3嘉泰姆
7.功能概述                        8.相关产品DB3嘉泰姆

 DB3嘉泰姆

一,产品概述(General Description)      DB3嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyDB3嘉泰姆
over a wide output current load range.DB3嘉泰姆

      This device offers two operation modes,PWM control and PFM ModeDB3嘉泰姆
switching control, which allows a high efficiency over the wider range of theDB3嘉泰姆
load.The  rber of readily available standard external components and isDB3嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.DB3嘉泰姆

二.产品特点(Features)DB3嘉泰姆

* High Efficiency: Up to 95%DB3嘉泰姆
* 600KHz Frequency OperationDB3嘉泰姆
* 2.0A Output CurrentDB3嘉泰姆
* No Schottky Diode RequiredDB3嘉泰姆
* 3.5V to 18V Input Voltage RangeDB3嘉泰姆
* 0.6V ReferenceDB3嘉泰姆
 Slope Compensated Current ModeDB3嘉泰姆
 Control for Excellent Line and LoadDB3嘉泰姆
 Transient ResponseDB3嘉泰姆
* Integrated internal compensationDB3嘉泰姆
* Stable with Low ESR Ceramic OutputDB3嘉泰姆
   CapacitorsDB3嘉泰姆
* Over Current Protection withDB3嘉泰姆
    Hiccup-ModeDB3嘉泰姆
* Input over voltage protection(OVP)DB3嘉泰姆
*  Thermal ShutdownDB3嘉泰姆
*  Inrush Current Limit and Soft StartDB3嘉泰姆
*  Available in SOT23-6 PackageDB3嘉泰姆
*  -40°C to +85°C Temperature RangeDB3嘉泰姆
三,应用范围 (Applications)DB3嘉泰姆

Distributed Power SystemsDB3嘉泰姆
Digital Set Top BoxesDB3嘉泰姆
Flat Panel Television and MonitorsDB3嘉泰姆
Wireless and DSL ModemsDB3嘉泰姆
Notebook ComputerDB3嘉泰姆
四.技术规格书下载（产品PDF）DB3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！DB3嘉泰姆

 DB3嘉泰姆

五,产品封装图 (Package)DB3嘉泰姆

DB3嘉泰姆
六.电路原理图DB3嘉泰姆

DB3嘉泰姆
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七,功能概述DB3嘉泰姆

Internal Regulator DB3嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentDB3嘉泰姆
transient response with no extra external compensation components. This device containsDB3嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KDB3嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCDB3嘉泰姆
performance.DB3嘉泰姆

Error AmplifierDB3嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andDB3嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenDB3嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,DB3嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationDB3嘉泰姆
network minimizes the external component counts and simplifies the control loop design. DB3嘉泰姆
Internal Soft-StartDB3嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingDB3嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)DB3嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSDB3嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanDB3嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.DB3嘉泰姆
Over-Current-Protection and HiccupDB3嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valueDB3嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isDB3嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isDB3嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisDB3嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageDB3嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theDB3嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isDB3嘉泰姆
removed. DB3嘉泰姆
Startup and Shutdown DB3嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheDB3嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theDB3嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingDB3嘉泰姆
八,相关芯片选择指南               更多同类产品......DB3嘉泰姆