目录

1.产品概述       2.产品特点     tAg嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）tAg嘉泰姆

5.产品封装       6.电路原理图  tAg嘉泰姆

7.相关产品tAg嘉泰姆

   产品概述 返回TOPtAg嘉泰姆

CXLD64251是一款可带载2A的低漏失线性稳压器，具有软启动可编程，自使能及Power Good的功能，并兼容了可外部选择输出电压或内部固定输出电压的特性。CXLD64251有两个电源：VCC用来驱动NMOS功率管的栅极, 而IN为负载提供了电源电压。利用此外部电源电压IN可以使功率管工作在极低的电源电压下，从而降低了功耗。CXLD64251的特点是具有极低的漏失电压，对于输出电压需要接近输入电压的应用是非常理想的选择。软启动是CXLD64251的另一特点，由于具有软启动功能，CXLD64251能在启动过程中减小输出电容上的过充电流，同时也在软启动过程中有效的保护了前级电源。另外，CXLD64251因具有外部可使能功能，所以能在关断情况下大幅度降低功耗。CXLD64251能在全电源电压，全负载电流及全温度变化的情况下保持优良的调整率。除此之外，当输出电压高于正常输出的90%以上时，CXLD64251还能提供Power OK的信号。CXLD64251的输出需要等于或大于2.2uF的陶瓷电容以稳定输出电压。在全电源电压，全负载电流及全温度变化的情况下，CXLD64251可以保持2%的输出精度。CXLD64251采用的了SOP-8(EP)的封装。The CXLD64251 is a 2A low-dropout (LDO) linear regulator which features a user-programmable soft-start, an enable input, a fixed or ADJ selectable output and a power-good output. CXLD64251 works with two input voltages: VCC provides 5V voltage to drive the gate of the N-MOS power transistor, while IN is the input voltage which supplies power to the load. The use of an external bias power allows the part to operate in ultra low IN voltage. The ECXLD64251features ultra low dropout, ideal for applications where OUT is very close to IN. Soft start is another character of CXLD64251 the soft-start can reduce inrush current of the load capacitors and minimizes stress on the input power source during start-up. Additionally, the CXLD64251has an enable pin to further reduce power dissipation while shutdown. The CXLD64251provides excellent regulation over variations in line, load and temperature. The CXLD64251provides a power OK signal when the output voltage reaches 90% of its normal value. The CXLD64251is stable with any Ceramic output capacitor of 2.2μF or more. A precision reference and feedback control deliver 2% accuracy over load, line, and operating temperature ranges. The ECXLD64251is available in SOP-8(EP) packages.

   产品特点 返回TOPtAg嘉泰姆

‧IN的电压很低，范围很宽：1.0V至5.5VtAg嘉泰姆

‧偏置电压VCC的范围：2.7V至5.5VtAg嘉泰姆

‧输出电压范围：0.8V至3.3VtAg嘉泰姆

‧低漏失电压：VCC=5V，负载1.5A时，漏失电压为165mVtAg嘉泰姆

‧保证2A的输出电流tAg嘉泰姆

‧全负载，全电源电压和全温度工作时，可以满足2%的精度tAg嘉泰姆

‧可提供PG(Power-Good)输出信号给电源检测或给后续的其它电源tAg嘉泰姆

‧可编程软启动功能可提供输出电压的线性上电tAg嘉泰姆

‧IN电源电压的低输入可以提供良好的瞬态相应tAg嘉泰姆

‧关断时具有自动放电功能tAg嘉泰姆

‧等于或大于2.2uF的陶瓷电容可以稳定输出电压tAg嘉泰姆

‧封装采用SOP-8(EP)tAg嘉泰姆

‧服从RoHS认证，100%的无铅和无卤素tAg嘉泰姆

Low IN and wide IN range:1.0V to 5.5VtAg嘉泰姆

 
Bias voltage (VVCC) range:2.7V to 5.5VtAg嘉泰姆

 
Low OUT range:0.8V to 3.3VtAg嘉泰姆

 
Low dropout:165mV typical at 1.5A, VVCC=5VtAg嘉泰姆

 
Guaranteed 2A Output CurrenttAg嘉泰姆

 
2% accuracy over line, load and temperature rangetAg嘉泰姆

 
Power-Good (PG) output for supply monitoring and for sequencing of other supplies
Programmable soft-start provides linear voltage startuptAg嘉泰姆

 
Bias supply permits low IN operation with good transient responsetAg嘉泰姆

 
Auto-Discharge when ShutdowntAg嘉泰姆

 
Stable with any Ceramic output capacitor≥2.2μFtAg嘉泰姆

 
Available in SOP-8(EP) PackagetAg嘉泰姆

 
RoHS Compliant and 100% Lead (Fb)-Free Halogen-FreetAg嘉泰姆

   应用范围 返回TOPtAg嘉泰姆

‧个人计算机，服务器，调制解调器及机顶盒tAg嘉泰姆

‧FPGA应用tAg嘉泰姆

‧为DSP核和I/O埠提供电源tAg嘉泰姆

‧后端调整器tAg嘉泰姆

‧有时序要求的应用tAg嘉泰姆

PCs, Servers, Modems, and Set-Top-BoxestAg嘉泰姆

FPGA ApplicationstAg嘉泰姆

DSP Core and I/O VoltagestAg嘉泰姆

Post-Regulation ApplicationstAg嘉泰姆

Applications With Sequencing RequirementstAg嘉泰姆

 技术规格书（产品PDF) 返回TOP tAg嘉泰姆

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产品封装图 返回TOPtAg嘉泰姆

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电路原理图 返回TOPtAg嘉泰姆

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