NCP705中文资料Voltage Regulator, LDO, Ultra Low Noise, Ultra Low Iq, 500 mA数据手册ONSEMI规格书

描述 Description

Noise sensitive RF applications such as Power Amplifiers in satellite radios, infotainment equipment, and precision instrumentation require very clean power supplies. The NCP705 is a 500 mA LDO that provides the engineer with a very stable, accurate voltage with ultra low noise and very high Power Supply Rejection Ratio (PSRR) suitable for RF applications. The device doesn't require any additional noise bypass capacitor to achieve ultra-low noise performance. In order to optimize performance for battery operated portable applications, the NCP705 employs dynamic Iq management for ultra-low quiescent current consumption at light-load conditions and great dynamic performance.

特性 Features

• Operating Input Voltage Range
• 2.5V to 5.5V
• Available in Fixed Voltage Options
• 0.8V to 3.5V Please Contact Factory for Other Voltage Options
• Ultra-Low Quiescent Current
• Typ. 13 uA
• Ultra-Low Noise
• 12 uVrms from 100 Hz to 100 kHz
• Very Low Dropout
• 250 mV typ. at 500 mA Output
• ±2% Accuracy Over Load/Line/Temperature
• High Accuracy Output Voltage
• High PSRR
• 71 dB at 1 kHz
• Internal Soft-Start
• Limits the Turn-On Inrush Current
• Adjustable operation from 0.8V
• Easy voltage selection according to customer requirements
• Thermal Shutdown and Current Limit Protections
• Stable with a 1 uF Ceramic Output Capacitor
• Active Output Discharge for Fast Turn-Off
• These are Pb-Free Devices

应用 Application

• Upgrade to TLV755

简介

NCP705属于集成电路（IC）的线性+开关稳压器。由制造生产的NCP705稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。