返回Analog Devices Inc.

Analog Devices Inc. ADM717x 6.5V CMOS LDO

亚德诺半导体 ADM7170/ADM7171/ADM7172 超低噪声、高 PSRR、快速瞬变响应 CMOS 低压差线性调节器采用 2.3V 到 6.5V 电压提供高达 500mA 的输出电流。这些高输出电流 LDO 适用于调节 6V 至 1.2V 供电轨的高性能模拟和混合信号电路。 该器件采用先进的专有架构，提供高电源抑制、低噪声特性，仅需一个 4.7μF 小型陶瓷输出电容，便可实现出色的线路与负载瞬态响应性能。这些 LDO 调节器的输出噪声电压为 5μV rms，并且不受输出电压影响。ADM7170/ADM7171/ADM7172 采用 8 引脚、3mm × 3mm LFCSP 封装，具有出色的散热性能，适合要求最大为 500mA 输出电流的薄型、小尺寸应用，例如模数转换器&数模转换器电路、精密放大器、PLL/VCO、时钟 IC、通信和 & 基础设施、医疗和&保健、工业 & 和仪器仪表等。

Available in an 8-lead, 3mm × 3mm LFCSP package, these devices offer excellent thermal performance for applications requiring up to 500mA of output current in a small, low profile footprint such as ADC & DAC circuits, precision amplifiers, PLLs/VCOs, clocking ICs, communications & infrastructure, medical & healthcare, and industrial & instrumentation.
 

特性

  • 2.3V to 6.5V Input voltage range
  • 500mA to 2A Maximum load current
  • Low noise of 5µ Vrms independent of output voltage at 100Hz to 100kHz
  • Fast transient response:
    • 1.5μs for 1mA to 500mA load step (ADM7170, ADM7171)
    • 1.5μs for 1mA to 1.5A load step (ADM7172)
  • 60dB PSRR at 100kHz
  • Low dropout voltage:
    • 42mV at 500mA load, VOUT = 3V (ADM7170, ADM7171)
    • 172mV at 2A load, VOUT = 3V (ADM7172)
  • Initial accuracy:
    • ±0.75% (ADM7170)
    • −0.5% (minimum), +1% (maximum) (ADM7171, ADM7172)
  • Accuracy over line, load, and temperature:
    • ±1.25% (ADM7170)
    • ±1.5% (ADM7171, ADM7172)
  • Quiescent current, IGND = 0.7mA at no load
  • Low shutdown current of 0.25μA at VIN = 5V
  • Stable with small 4.7μF ceramic output capacitor
  • Adjustable and fixed output voltage options: 1.2V to 5.0V
  • Adjustable output from 1.2V to VIN − VDO
  • Precision enable
  • Adjustable soft start
  • 8-lead, 3mm × 3mm LFCSP package

应用

  • Regulation to noise sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation

技术文章

  • Understanding the Fundamentals of Earthquake Signal Sensing Networks
    Modern, low cost MEMs based ground sensing technology is now capable of measurements that are on par with traditional instruments. Using the wide range of Analog Devices products, a sensing device can be implemented to cater different seismic sensing applications.
    Learn More
发布日期: 2014-10-16 | 更新日期: 2025-06-03