目录28z嘉泰姆

1.产品概述                       2.产品特点28z嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 28z嘉泰姆
5.产品封装图                     6.电路原理图                   28z嘉泰姆
7.功能概述                        8.相关产品28z嘉泰姆

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一,产品概述(General Description)      28z嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiency28z嘉泰姆
over a wide output current load range.This device offers two operation modes,PWM control and PFM Mode switching control, which allows a high28z嘉泰姆
efficiency over the wider range of the load.The  rber of readily available standard external components and is available in an 6-pin SOT23 ROHS compliant package.28z嘉泰姆

二.产品特点(Features)28z嘉泰姆

* High Efficiency: Up to 95%28z嘉泰姆
* 600KHz Frequency Operation28z嘉泰姆
* 2.0A Output Current28z嘉泰姆
* No Schottky Diode Required28z嘉泰姆
* 3.5V to 18V Input Voltage Range28z嘉泰姆
* 0.6V Reference28z嘉泰姆
 Slope Compensated Current Mode28z嘉泰姆
 Control for Excellent Line and Load28z嘉泰姆
 Transient Response28z嘉泰姆
* Integrated internal compensation28z嘉泰姆
* Stable with Low ESR Ceramic Output28z嘉泰姆
   Capacitors28z嘉泰姆
* Over Current Protection with28z嘉泰姆
    Hiccup-Mode28z嘉泰姆
* Input over voltage protection(OVP)28z嘉泰姆
*  Thermal Shutdown28z嘉泰姆
*  Inrush Current Limit and Soft Start28z嘉泰姆
*  Available in SOT23-6 Package28z嘉泰姆
*  -40°C to +85°C Temperature Range28z嘉泰姆
三,应用范围 (Applications)28z嘉泰姆

Distributed Power Systems28z嘉泰姆
Digital Set Top Boxes28z嘉泰姆
Flat Panel Television and Monitors28z嘉泰姆
Wireless and DSL Modems28z嘉泰姆
Notebook Computer28z嘉泰姆
四.技术规格书下载（产品PDF）28z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！28z嘉泰姆

 28z嘉泰姆

五,产品封装图 (Package)28z嘉泰姆

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六.电路原理图28z嘉泰姆
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七,功能概述28z嘉泰姆

Internal Regulator 28z嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellent28z嘉泰姆
transient response with no extra external compensation components. This device contains28z嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600K28z嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DC28z嘉泰姆
performance.28z嘉泰姆

Error Amplifier28z嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) and28z嘉泰姆
outputs a current proportional to the difference between the two. This output current is then28z嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,28z嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensation28z嘉泰姆
network minimizes the external component counts and simplifies the control loop design. 28z嘉泰姆
Internal Soft-Start28z嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshooting28z嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)28z嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SS28z嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher than28z嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.28z嘉泰姆
Over-Current-Protection and Hiccup28z嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak value28z嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB is28z嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV is28z嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. This28z嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The average28z嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect the28z嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition is28z嘉泰姆
removed. 28z嘉泰姆
Startup and Shutdown 28z嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. The28z嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then the28z嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remaining28z嘉泰姆
八,相关芯片选择指南               更多同类产品......28z嘉泰姆