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1A Automotive Low-Noise LDO Linear Regulator

Low 7µVRMS Noise 1A LDO

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • 1.7V to 5.5V Input Voltage Range
  • 0.6V to 5.3V Programmable Output Voltage
  • 7µVRMS Output Noise, 10Hz to 100kHz
  • 1200µA Operating Supply Current
  • 70dB PSRR at 10kHz
  • 1A Maximum Output Current
  • ±1% DC Accuracy Over Load, Line, and Temperature
  • 100mV Maximum Dropout at 1A Load
  • < 1µA Shutdown Supply Current
  • Stable with 4µF(min) Output Capacitance
  • Programmable Soft-Start Rate
  • Overcurrent and Overtemperature Protection
  • Output-to-Input Reverse-Current Protection
  • Power-OK Output
  • 3mm x 3mm 10-pin TDFN Package
  • AEC-Q100
  • -40°C to 125°C Operating Temperature
  • Applications/Uses

    • Audio Systems
    • Automotive Electronics
    • High-Resolution Data Acquisition Systems

    Description

    The MAX25301A/B are low-noise automotive linear regulators that deliver up to 1A of output current with only 7µVRMS of output noise from 10Hz to 100kHz.

    These regulators maintain ±1% output accuracy over a wide input-voltage range, requiring only 100mV of input-to-output headroom at full load. The 1200µA no-load supply current is independent of dropout voltage.

    The MAX25301A has nine pin-selectable output voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX25301B output voltage can be adjusted to a value in the range of 0.6V to 5.3V using two external resistors. The MAX25301B also includes an active-high POK signal for trouble-free load startup.

    All versions include a programmable output soft-start rate as well as output-overcurrent and thermal-overload protection.

    The MAX25301A/B are offered in a 10-pin TDFN (3mm x 3mm) package.

    Simplified Block Diagram

    MAX25301A, MAX25301B: Typical Operating Circuit MAX25301A, MAX25301B: Typical Operating Circuit Zoom icon

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .