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发布者:来自网络 发布时间:2014/5/8 阅读:4527次    关键字: LDO
EUP7908-低噪声,高PSRR,具有PGOOD指示的600mA LDO


EUP7908-低噪声,高PSRR,具有PGOOD指示的600mA LDO DataSheet

概述

EUP7908是一款CMOS低漏失电压调节器,能满足超低噪声的应用。EUP7908具有输出电压精度高,漏失电压低,启动时间快的优点。由于EUP7908的低噪声无需外部bypass电容就可以实现,故能满足要求理想电源的RF应用。EUP7908是针对手持和电池电源设备设计的,它的EN引脚可以与晶体管逻辑相兼容。当EUP7908的使能使芯片处于关断状态时,输出电压几乎接近为0。EUP7908主要包括电流限制,热关断和快速瞬态响应的功能,它还具有开漏输出的PGOOD信号,用以检测输出是否正常。
EUP7908的输出电容需采用低ESR的陶瓷电容,它采用了可以减小板子空间的2mm×2mm的TDFN-6封装。EUP7908还提供了宽范围输出的固定版本。

特点

‧2.5V到5.5V的输入电压范围;
‧30uV(rms)的输出噪声;
‧600mA时360mV的漏失电压
‧无Bypass电容时1kHz的PSRR为68dB
‧600mA的输出电流
‧2.2uF的输出电容
‧优良的负载和线性瞬态响应
‧具有PGOOD功能
‧具有热关断和电流保护功能
‧外部可调输出电压:0.8V~5V
‧关断时具有自动放电功能
‧TDFN-6 2mm×2mm的封装
‧符合RoHS标准,100%的无铅和无卤素

应用

‧可携式电话
‧摄像头模块
‧掌上计算机
‧消费性/个人的电子产品

EUP7908-Low-Noise, High-PSRR, 600mA LDO with PGOOD Indication 

Description
The EUP7908 is an efficient CMOS low dropout (LDO) voltage regulator optimized for ultra-low-noise applications. It offers high output accuracy, low dropout voltage and fast start-up time. The EUP7908 provides a very low noise output without a bypass capacitor, ideal for RF applications where a clean supply voltage source is required. Specifically designed for handheld and battery-powered devices, the EUP7908 provides a TTL-logic-compatible enable pin. When the EUP7908 is disabled, power consumption drops nearly to zero. Key features include current limit, thermal shutdown and faster transient response. The EUP7908 generates an open-drain PGOOD signal to monitor the output regulation.
The EUP7908 works with low-ESR ceramic capacitors. Available in 2mm 2mm TDFN-6 package which reduces the amount of board space for power applications. The EUP7908 offers wide fixed output voltage versions.

Feature
‧2.5V to 5.5V Input Voltage Range
‧30μV(rms) Output Noise
‧360mV Dropout @ 600mA
‧68dB PSRR at 1kHz No Bypass Capacitor
‧Guaranteed 600mA Output Current
‧Stable with a 2.2μF Ceramic Output Capacitor
‧Excellent Load/Line Transient
‧Power-Good Window Comparator
‧Thermal Shutdown and Current Limit Protection
‧Adjustable Output Voltage:0.8V to 5V
‧Auto-Discharge when Shutdown
‧Available in 2mm 2mm TDFN-6 Package
‧RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free

Application
‧Cellular Phones
‧Camera Modules
‧PDA and Palmtop Computers
‧Consumer/Personal Electronics

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