目录c5W嘉泰姆

1.产品概述                       2.产品特点c5W嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 c5W嘉泰姆
5.产品封装图                     6.电路原理图                   c5W嘉泰姆
7.功能概述                        8.相关产品c5W嘉泰姆

 c5W嘉泰姆

一,产品概述(General Description)      c5W嘉泰姆

     The CXSD61054   is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054   operates at high efficiencyc5W嘉泰姆
over a wide output current load range.c5W嘉泰姆

      This device offers two operation modes,PWM control and PFM Modec5W嘉泰姆
switching control, which allows a high efficiency over the wider range of thec5W嘉泰姆
load.The  rber of readily available standard external components and isc5W嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.c5W嘉泰姆

二.产品特点(Features)c5W嘉泰姆

* High Efficiency: Up to 95%c5W嘉泰姆
* 600KHz Frequency Operationc5W嘉泰姆
* 2.0A Output Currentc5W嘉泰姆
* No Schottky Diode Requiredc5W嘉泰姆
* 3.5V to 18V Input Voltage Rangec5W嘉泰姆
* 0.6V Referencec5W嘉泰姆
 Slope Compensated Current Modec5W嘉泰姆
 Control for Excellent Line and Loadc5W嘉泰姆
 Transient Responsec5W嘉泰姆
* Integrated internal compensationc5W嘉泰姆
* Stable with Low ESR Ceramic Outputc5W嘉泰姆
   Capacitorsc5W嘉泰姆
* Over Current Protection withc5W嘉泰姆
    Hiccup-Modec5W嘉泰姆
* Input over voltage protection(OVP)c5W嘉泰姆
*  Thermal Shutdownc5W嘉泰姆
*  Inrush Current Limit and Soft Startc5W嘉泰姆
*  Available in SOT23-6 Packagec5W嘉泰姆
*  -40°C to +85°C Temperature Rangec5W嘉泰姆
三,应用范围 (Applications)c5W嘉泰姆

Distributed Power Systemsc5W嘉泰姆
Digital Set Top Boxesc5W嘉泰姆
Flat Panel Television and Monitorsc5W嘉泰姆
Wireless and DSL Modemsc5W嘉泰姆
Notebook Computerc5W嘉泰姆
四.技术规格书下载（产品PDF）c5W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！c5W嘉泰姆

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五,产品封装图 (Package)c5W嘉泰姆

c5W嘉泰姆
六.电路原理图c5W嘉泰姆
c5W嘉泰姆
七,功能概述c5W嘉泰姆

Internal Regulator c5W嘉泰姆
The CXSD61054   is a current mode step down DC/DC converter that provides excellentc5W嘉泰姆
transient response with no extra external compensation components. This device containsc5W嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600Kc5W嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCc5W嘉泰姆
performance.c5W嘉泰姆

Error Amplifierc5W嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andc5W嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenc5W嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,c5W嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationc5W嘉泰姆
network minimizes the external component counts and simplifies the control loop design. c5W嘉泰姆
Internal Soft-Startc5W嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingc5W嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)c5W嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSc5W嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanc5W嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.c5W嘉泰姆
Over-Current-Protection and Hiccupc5W嘉泰姆
The JTM2234 has cycle-by-cycle over current limit when the inductor current peak valuec5W嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isc5W嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isc5W嘉泰姆
triggered, the JTM2234 enters hiccup mode to periodically restart the part. Thisc5W嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagec5W嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thec5W嘉泰姆
regulator. The JTM2234 exits the hiccup mode once the over current condition isc5W嘉泰姆
removed. c5W嘉泰姆
Startup and Shutdown c5W嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Thec5W嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thec5W嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingc5W嘉泰姆
八,相关芯片选择指南               更多同类产品......c5W嘉泰姆