EUP7932-具有可编程软启动功能可带载2A的低漏失线性稳压器  DataSheet
概述
EUP7932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。
EUP7932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。EUP7932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EUP7932的另一特点，由于具有软启动功能，EUP7932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，EUP7932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。EUP7932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，EUP7932还能提供Power OK的信号。
EUP7932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，EUP7932可以保持2%的输出精度。EUP7932采用的了SOP-8(EP)的封装。
特点
‧IN的电压很低，范围很宽：1.0V至5.5V
‧偏置电压VCC的范围：2.7V至5.5V
‧输出电压范围：0.8V至3.3V
‧低漏失电压：VCC=5V，负载1.5A时，漏失电压为165mV
‧保证2A的输出电流
‧全负载，全电源电压和全温度工作时，可以满足2%的精度
‧可提供PG(Power-Good)输出信号给电源检测或给后续的其它电源
‧可编程软启动功能可提供输出电压的线性上电
‧IN电源电压的低输入可以提供良好的瞬态相应
‧关断时具有自动放电功能
‧等于或大于2.2uF的陶瓷电容可以稳定输出电压
‧封装采用SOP-8(EP)
‧服从RoHS认证，100%的无铅和无卤素
应用
‧个人计算机，服务器，调制解调器及机顶盒
‧FPGA应用
‧为DSP核和I/O埠提供电源
‧后端调整器
‧有时序要求的应用
EUP7932-2A Low Dropout Linear Regulator with Programmable Soft-Start
Description
The EUP7932 is a 2A low-dropout (LDO) linear regulator which features a user-programmable soft-start, an enable input, a fixed or ADJ able output and a power-good output.
EUP7932 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 EUP7932 features ultra low dropout, ideal for applications where OUT is very close to IN. Soft start is another character of EUP7932, the soft-start can reduce inrush current of the load capacitors and minimizes stress on the input power source during start-up.
Additionally, the EUP7932 has an enable pin to further reduce power dissipation while shutdown. The EUP7932 provides excellent regulation over variations in line, load and temperature. The EUP7932 provides a power OK signal when the output voltage reaches 90% of its normal value.
The EUP7932 is 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 EUP7932 is available in SOP-8(EP) packages.
Feature
•Low IN and wide IN range:1.0V to 5.5V
•Bias voltage (VVCC) range:2.7V to 5.5V
•Low OUT range:0.8V to 3.3V
•Low dropout:165mV typical at 1.5A, VVCC=5V
•Guaranteed 2A Output Current
•2% accuracy over line, load and temperature range
•Power-Good (PG) output for supply monitoring and for sequencing of other supplies
•Programmable soft-start provides linear voltage startup
•Bias supply permits low IN operation with good transient response
•Auto-Discharge when Shutdown
•Stable with any Ceramic output capacitor 2.2µF
•Available in SOP-8(EP) Package
•RoHS Compliant and 100% Lead (Fb)-Free Halogen-Free
Application
‧PCs, Servers, Modems, and Set-Top-Boxes
‧FPGA Applications
‧DSP Core and I/O Voltages
‧Post-Regulation Applications
‧Applications With Sequencing Requirements
|