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Low Noise Bias Generator in 2mm × 2mm DFN

Mar 4 2014 - MILPITAS, CA
  • Linear Technology Corporation announces the LT3048, a step-up DC/DC converter with an integrated LDO output that delivers a low noise, low ripple 15V bias supply. The LT3048-15 delivers up to 40mA of continuous output current at 15V with output ripple and noise less than 500µVPK-PK and 0.1% load regulation. The device operates from an input voltage range of 2.7V to 4.8V, making it suitable for single-cell Li-Ion batteries or 3.3V logic rails. Its constant switching frequency of 2.2MHz enables the use of tiny externals. Combined with a 2mm × 2mm DFN package and an integrated Schottky diode, the LT3048-15 offers a simple, compact solution footprint for low noise biasing applications.


    The LT3048-15’s internal high efficiency switch and 2.2MHz constant frequency operation delivers a low ripple output to the LDO, delivering 15V with ultralow output ripple and noise of less than 500µVPK-PK. Its current-mode control enables fast transient response without the need for complex external compensation. To further enhance system reliability, the LT3048-15 offers short-circuit and thermal protection as well as load disconnect in shutdown.


    The LT3048EDC-15 is available in a 2mm × 2mm DFN-8 package, priced at $1.65 each for 1,000 piece quantities. An industrial temperature (40°C to 125°C) version, the LT3048IDC-15, is priced at $1.82 each for 1,000 piece quantities. Both versions are available from stock. For more information, visit www.linear.com/product/LT3048.


    Summary of Features: LT3048-15


    • Generates Low Noise Bias Voltage from Single-Cell Li-Ion Battery
    • Output Current: Up to 40mA
    • Low Output Ripple & Noise: <500µVP-P
    • Boost Regulator
    • 2.2MHz Operation
    • 300mA Power Switch
    • Integrated Schottky Diode
    • Low Dropout Linear Regulator
    • Low Noise: <120µVRMS (10Hz to 100kHz)
    • 0.1% Load Regulation
    • Short-Circuit & Thermal Protection
    • Load Disconnect in Shutdown
    • Available in 2mm × 2mm DFN Package
     

    Tiny Low Noise Boost Generator for Biasing Applications


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