NCP690中文资料Linear Voltage Regulator, CMOS VLDO, 1.0 A数据手册ONSEMI规格书

描述 Description

The NCP690/ NCP691 /NCP692 devices are designed to be Very Low Dropout (LDO) 1 Amp Linear Voltage regulators. This new CMOS VLDO family provides 1A of output current in either fixed voltage options or an adjustable output voltage from 5.0V down to 1.25V. The devices are designed for space constrained and portable battery powered applications and offer many important features such as high PSRR, low Quiescent and Ground current consumption, low noise operation and short circuit and thermal protection. They offer enhanced ESD protection compared to standard CMOS LDOs and are designed to be used with low cost ceramic capacitors. The NCP691 includes an Enable low function, the NCP692 an enable high, and all three products are packaged in the 6-Lead DFN3x3 package.

特性 Features

• Output Voltage Options: Adjustable, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V- Contact Factory for Other Voltage Options
• Available in the most popular voltage options. Others may be available on request.
• Current Limit Protection
• Leads to more robust products
• Thermal Shutdown Protection
• Suitable for use in harsh environments
• Typical Noise Voltage of 15 Vrms without a Bypass Capacitor
• Suitable for audio and other electrical noise sensitive applications
• Input Voltage down to 1.5V
• Suitable for lower voltage input rails
• Typical Dropout Voltage of 190 mV at 1 A (Vout = 2.5 V, TJ = 25C)
• Suitable for lower voltage input rails and battery powered applications
• Active Low Enable Pin (NCP691 device)Active High Enable Pin (NCP692 device)
• Power saving modes
• Enhanced ESD: 4 kV and 400 V
• Less inclined to damage during board assembly compared to standard CMOS devices.
• Active Output Discharge
• Faster response time to shutdown and less chance of damaging reverse current flows
• Guaranteed 1 A Output Current
• 2% Output Voltage Tolerance over All Operating Conditions (fixed output options)
• Adjustable Output by External Resistors from 5.0 V down to 1.25 V
• 1.5% Output Voltage Tolerance over All Operating Conditions(Adjustable)

应用 Application

• DSP, FPGA, Microprocessor Power Supplies
• SMPS Post-Regulator
• Modem Banks, Routers, Telecom Boards, Computer and game box accessories
• Car entertainment systems,Battery Powered Applications
• Cable boxes, Satellite receivers, Set Top Boxes
• Laptops and PCI Cards
• Hard Disk Drivers

简介

NCP690属于集成电路（IC）的线性+开关稳压器。由制造生产的NCP690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。