Electronic Design
  • Resources
  • Directory
  • Webinars
  • CAD Models
  • Video
  • Blogs
  • More Publications
  • Advertise
    • Search
  • Top Stories
  • Tech Topics
  • Analog
  • Power
  • Embedded
  • Test
  • AI / ML
  • Automotive
  • Data Sheets
  • Topics
    - TechXchange Topics --- Markets --AutomotiveAutomation-- Technologies --AnalogPowerTest & MeasurementEmbedded
    Resources
    Electronic Design ResourcesTop Stories of the WeekNew ProductsKit Close-UpElectronic Design LibrarySearch Data SheetsCompany DirectoryBlogsContribute
    Members
    ContentBenefitsSubscribeDigital editions
    Advertise
    https://www.facebook.com/ElectronicDesign
    https://www.linkedin.com/groups/4210549/
    https://twitter.com/ElectronicDesgn
    https://www.youtube.com/channel/UCXKEiQ9dob20rIqTA7ONfJg
    Powerelectronics 3298 02559lineartechnology
    1. Power Supply
    2. Regulators

    20V, 200mA RF LDO with Ultralow (0.8µVRMS) Noise

    April 15, 2015
    Linear Technology Corp. announces the LT3042, ultralow noise, ultrahigh power supply ripple rejection (PSRR) low dropout voltage linear regulator.

    Linear Technology Corporation announces the LT3042, a leading-edge, ultralow noise, ultrahigh power supply ripple rejection (PSRR) low dropout voltage linear regulator. Its unique design features ultralow spot noise of only  at 10kHz and 0.8µVRMS integrated output noise across a wide 10Hz to 100kHz bandwidth. Low and high frequency PSRR performance are exceptional. Low frequency PSRR exceeds 90dB out to 10kHz and high frequency PSRR exceeds 75dB out to 3MHz, quieting noisy or high ripple input supplies. The LT3042 utilizes LTC's proprietary LDO architecture-a precision current source reference followed by a high performance unity gain buffer, resulting in virtually constant bandwidth, noise, PSRR and load regulation performance independent of output voltage. In addition, this architecture permits paralleling of multiple LT3042s to further decrease noise, increase output current and spread heat on a printed circuit board (PCB).         

    The LT3042 delivers up to 200mA output current with a 350mV dropout voltage at full load, across a wide 1.8V to 20V input voltage range. Output voltage range is 0V to 15V and output voltage tolerance is highly accurate at ±2% over line, load and temperature. The device's wide input and output voltage ranges, high bandwidth, high PSRR and ultralow noise performance make it ideal for powering noise-sensitive applications such as: PLLs / VCOs / mixers / LNAs, very low noise instrumentation, high speed/high precision data converters, medical applications such as imaging and diagnostics, precision power supplies and as a post regulator for switching supplies.

    The LT3042 operates with a small, low cost, 4.7µF ceramic output capacitor, optimizing stability and transient response. A single resistor programs the external precision current limit (±10% over temperature). A single SET pin capacitor lowers output noise and provides reference soft-start functionality, preventing output voltage overshoot at turn on. Moreover, the device's internal protection circuitry includes reverse battery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis. Other features include fast start-up capability (useful if large value SET pin capacitors are used) and a power good flag with programmable threshold to indicate output voltage regulation.

    The IC is available in thermally enhanced 10-lead 3mm x 3mm DFN and 10-lead MSOP packages, both with a compact footprint. The E- and I-grade versions are available from stock with an operating junction temperature of -40°C to 125°C. The high temperature H grade is rated from -40°C to 150°C, and the high reliability MP-grade version is specified from -55°C to 150°C. Devices are in stock, and pricing starts at $2.25 each for the E grade in 1,000-piece quantities

    Continue Reading

    DC-DC Converter Design Basics (Part 3): Buck-Boost Converters

    Bringing Isolation, High Efficiency, and Lower Noise to Switching Power Supplies

    Sponsored Recommendations

    Designing automotive-grade camera-based mirror systems

    Dec. 2, 2023

    Design security cameras and other low-power smart cameras with AI vision processors

    Dec. 2, 2023

    Automotive 1 TOPS vision SoC with RGB-IR ISP for 1-2 cameras, driver monitoring, dashcams

    Dec. 2, 2023

    AM62A starter kit for edge AI, vision, analytics and general purpose processors

    Dec. 2, 2023

    Comments

    To join the conversation, and become an exclusive member of Electronic Design, create an account today!

    I already have an account

    New

    Super-Slim Wireless, Self-Powered “Sticker” Measures Contact Force

    Commercial-Ready Route in Texas for Driverless Trucks Planned for Late 2024

    Running Background Checks on Today’s Celebrity Scientists

    Most Read

    Can Silicon Supply Enough Power for the Future of AI Silicon?

    FAQ: Upgrading to Intelligent, Programmable, Bidirectional Power Systems

    Unify SDK Bridges Matter with Other Protocols


    Sponsored

    Parallel LDO Architecture Design Using Ballast Resistors

    Four-channel synchronous vibration sensor interface reference design

    Low-Noise and Low-Ripple Techniques for a Supply Without an LDO

    Electronic Design
    https://www.facebook.com/ElectronicDesign
    https://www.linkedin.com/groups/4210549/
    https://twitter.com/ElectronicDesgn
    https://www.youtube.com/channel/UCXKEiQ9dob20rIqTA7ONfJg
    • About Us
    • Contact Us
    • Advertise
    • Do Not Sell or Share
    • Privacy & Cookie Policy
    • Terms of Service
    © 2023 Endeavor Business Media, LLC. All rights reserved.
    Endeavor Business Media Logo