EUP7917-300mA,低噪声,低压差线性稳压器  DataSheet
概述
EUP7917是一款为超低噪声优化设计的高效CMOS线性稳压器，它还具有高输出精度、极低压差、低静态电流和快速启动等特性。
EUP7917输出很低的噪声电压，应用于需要干净电压源的RF电路是非常理想的，一个旁路噪声的引脚可以用来大大地降低输出噪声。 这款器件为手持式和电池供电的设备特别设计，它提供了与TTL逻辑兼容的使能控制引脚，当使能关断时，功耗下降至几乎为零。
EUP7917采用5引脚SC-70封装，它可以在使用低ESR的陶瓷电容时正常工作，大大节省了PCB板空间，这对手持式无线设备是非常重要的。
EUP7917能提供很宽范围的输出电压。关键特性还包括电流限制、过温关断保护和快速瞬态响应。
特点
• 节省空间的5引脚SC-70封装• 2.5V至5.5V输入电压范围• 50μVrms输出噪声• 300mA负载时250mV低压差• 在1kHz时，达到75dB的PSRR• 70μA低地电流• 能提供300mA输出电流• 稳定工作于1μF陶瓷电容 • 优异的负载和电源瞬态响应• 热关断和电流限制保护 • 输出电压：1.5V、1.8V、2.5V、2.8V、2.85V、2.9V、3.0V、3.3V 和可调输出电压• 符合RoHS规范及Pb-Free
应用
• 蜂窝电话
• 蓝牙便携式设备
• PDA、掌上型电脑• 个人消费电子
EUP7917-300mA, High PSRR Low-Noise LDO
Description
The EUP7917 is an efficient, CMOS voltage regulator optimized for ultra-low-noise applications. It offers high output accuracy, extremely low dropout voltage low ground current and fast start-up time. The EUP7917 provides a very low noise output, ideal for RF applications where a clean voltage source is required. A noise bypass pin is also available for further reduction of output noise.
Designed specifically for handheld and battery- powered devices, the EUP7917 provides a TTL-logic-compatible enable pin. When disabled, power consumption drops nearly to zero. The EUP7917 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices.
Available in the SC-70 package, the EUP7917 offers a wide range of output voltages. Key features include current limit, thermal shutdown and faster transient response.
Feature
• Space-Saving 5-pin SC-70 Package
• 2.5V to 6V Input Voltage Range
• 50μV(rms) Output Noise
• 250mV Dropout @ 300mA
• 75dB PSRR at 1kHz
• Low 70μA Ground Current
• Up to 300mA Output Current
• Stability with 1μF Ceramic Output Capacitors
• Excellent Load/Line Transient
• Thermal Shutdown and Current Limit Protection
• Available in 1.5V,1.8V,2.5V,2.8V,2.85V,3.0V , 3.3V and Adjustable Voltages
• RoHS Compliant and 100% Lead (Pb)-Free
Application
• Cellular Phones
• Bluetooth Portable Radios and Accessories
• PDA and Palmtop Computers
• Consumer/Personal Electronics
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