目录cvt嘉泰姆

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

 cvt嘉泰姆

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

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

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

二.产品特点(Features)cvt嘉泰姆

* High Efficiency: Up to 95%cvt嘉泰姆
* 600KHz Frequency Operationcvt嘉泰姆
* 2.0A Output Currentcvt嘉泰姆
* No Schottky Diode Requiredcvt嘉泰姆
* 3.5V to 18V Input Voltage Rangecvt嘉泰姆
* 0.6V Referencecvt嘉泰姆
 Slope Compensated Current Modecvt嘉泰姆
 Control for Excellent Line and Loadcvt嘉泰姆
 Transient Responsecvt嘉泰姆
* Integrated internal compensationcvt嘉泰姆
* Stable with Low ESR Ceramic Outputcvt嘉泰姆
   Capacitorscvt嘉泰姆
* Over Current Protection withcvt嘉泰姆
    Hiccup-Modecvt嘉泰姆
* Input over voltage protection(OVP)cvt嘉泰姆
*  Thermal Shutdowncvt嘉泰姆
*  Inrush Current Limit and Soft Startcvt嘉泰姆
*  Available in SOT23-6 Packagecvt嘉泰姆
*  -40°C to +85°C Temperature Rangecvt嘉泰姆
三,应用范围 (Applications)cvt嘉泰姆

Distributed Power Systemscvt嘉泰姆
Digital Set Top Boxescvt嘉泰姆
Flat Panel Television and Monitorscvt嘉泰姆
Wireless and DSL Modemscvt嘉泰姆
Notebook Computercvt嘉泰姆
四.技术规格书下载（产品PDF）cvt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！cvt嘉泰姆

 cvt嘉泰姆

五,产品封装图 (Package)cvt嘉泰姆

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

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

Error Amplifiercvt嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andcvt嘉泰姆
outputs a current proportional to the difference between the two. This output current is thencvt嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,cvt嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationcvt嘉泰姆
network minimizes the external component counts and simplifies the control loop design. cvt嘉泰姆
Internal Soft-Startcvt嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingcvt嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)cvt嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SScvt嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thancvt嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.cvt嘉泰姆
Over-Current-Protection and Hiccupcvt嘉泰姆
The JTM2234 has cycle-by-cycle over current limit when the inductor current peak valuecvt嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB iscvt嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV iscvt嘉泰姆
triggered, the JTM2234 enters hiccup mode to periodically restart the part. Thiscvt嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagecvt嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thecvt嘉泰姆
regulator. The JTM2234 exits the hiccup mode once the over current condition iscvt嘉泰姆
removed. cvt嘉泰姆
Startup and Shutdown cvt嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Thecvt嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thecvt嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingcvt嘉泰姆
八,相关芯片选择指南               更多同类产品......cvt嘉泰姆