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目录v7P嘉泰姆

1.产品概述                       2.产品特点v7P嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 v7P嘉泰姆
5.产品封装图                     6.电路原理图                   v7P嘉泰姆
7.功能概述                        8.相关产品v7P嘉泰姆

 v7P嘉泰姆

一,产品概述(General Description)      v7P嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyv7P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 highv7P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.v7P嘉泰姆

二.产品特点(Features)v7P嘉泰姆

* High Efficiency: Up to 95%v7P嘉泰姆
* 600KHz Frequency Operationv7P嘉泰姆
* 2.0A Output Currentv7P嘉泰姆
* No Schottky Diode Requiredv7P嘉泰姆
* 3.5V to 18V Input Voltage Rangev7P嘉泰姆
* 0.6V Referencev7P嘉泰姆
 Slope Compensated Current Modev7P嘉泰姆
 Control for Excellent Line and Loadv7P嘉泰姆
 Transient Responsev7P嘉泰姆
* Integrated internal compensationv7P嘉泰姆
* Stable with Low ESR Ceramic Outputv7P嘉泰姆
   Capacitorsv7P嘉泰姆
* Over Current Protection withv7P嘉泰姆
    Hiccup-Modev7P嘉泰姆
* Input over voltage protection(OVP)v7P嘉泰姆
*  Thermal Shutdownv7P嘉泰姆
*  Inrush Current Limit and Soft Startv7P嘉泰姆
*  Available in SOT23-6 Packagev7P嘉泰姆
*  -40°C to +85°C Temperature Rangev7P嘉泰姆
三,应用范围 (Applications)v7P嘉泰姆

Distributed Power Systemsv7P嘉泰姆
Digital Set Top Boxesv7P嘉泰姆
Flat Panel Television and Monitorsv7P嘉泰姆
Wireless and DSL Modemsv7P嘉泰姆
Notebook Computerv7P嘉泰姆
四.技术规格书下载（产品PDF）v7P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！v7P嘉泰姆

 v7P嘉泰姆

五,产品封装图 (Package)v7P嘉泰姆

v7P嘉泰姆
六.电路原理图v7P嘉泰姆
v7P嘉泰姆
七,功能概述v7P嘉泰姆

Internal Regulator v7P嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentv7P嘉泰姆
transient response with no extra external compensation components. This device containsv7P嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600Kv7P嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCv7P嘉泰姆
performance.v7P嘉泰姆

Error Amplifierv7P嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andv7P嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenv7P嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,v7P嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationv7P嘉泰姆
network minimizes the external component counts and simplifies the control loop design. v7P嘉泰姆
Internal Soft-Startv7P嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingv7P嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)v7P嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSv7P嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanv7P嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.v7P嘉泰姆
Over-Current-Protection and Hiccupv7P嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuev7P嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isv7P嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isv7P嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. Thisv7P嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagev7P嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thev7P嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isv7P嘉泰姆
removed. v7P嘉泰姆
Startup and Shutdown v7P嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Thev7P嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thev7P嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingv7P嘉泰姆
八,相关芯片选择指南               更多同类产品......v7P嘉泰姆

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