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High-Efficiency, 3-Output, Low-Voltage DC-DC Converter

Small Automotive PMIC for ADAS Applications Requiring ASIL

Product Details

Key Features

Applications/Uses

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Key Features

  • Multiple Functions for Small Size
    • Synchronous 750mA Boost Converter
    • Fixed at 5V Output
    • Dual Synchronous Buck Converters Up to 3.6A
      • Factory-Configurable from 0.8V to 3.8V in 25mV Steps
    • Programmable Windowed Watchdog
    • 3.0V to 5.5V Operating Supply Voltage
    • 2.2MHz Operation
    • Individual Active-Low RESET_ Outputs
    • High-Precision Performance
      • ±1.9% Output-Voltage Accuracy (OUT1) and
      • ±1.4% Output-Voltage Accuracy (OUT2, OUT3)
      • ±1.3% OV/UV Monitoring (OUT1–OUT3, PV)
    • Excellent Load-Transient Performance
  • Diagnostics and Redundant Circuits
    • ASIL-C Compliant
    • Redundant Reference
    • Fail Safe on Open Pins
    • Shorted Pin Detection Active Low-RESET1–RESET3
    • Input Overvoltage Detection
  • Robust for the Automotive Environment
    • Current Mode, Forced-PWM and Skip Operation
    • Overtemperature and Short-Circuit Protection
    • 24-Pin (4mm x 4mm) TQFN with Exposed Pad
    • -40 °C to +125 °C Automotive Temperature Range

Applications/Uses

  • ADAS
  • Infotainment
  • SOC Power

Description

The MAX20419 is a high-efficiency, 3-output, low-voltage DC-DC converter IC. OUT1 boosts the input supply to 5V at up to 750mA, while two synchronous step-down converters operate from a 3.0V to 5.5V input voltage range and provide a 0.8V to 3.8V output voltage range at up to 3.6A. The boost converter achieves ±1.9% and the buck converters achieve ±1.4% output error over load, line, and temperature range. The IC features a 2.2MHz fixed-frequency pulse-width modulation (PWM) mode for better noise immunity and load-transient response, and a pulse-frequency-modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz frequency operation allows the use of all-ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads, and make the layout a much simpler task with respect to discrete solutions.

The IC is offered with factory-preset output voltages (see the Ordering Information/Selector Guide for available options). Other features include soft-start, overcurrent, and overtemperature protections. The MAX20419 also has several redundancy and diagnostic features for compatibility with ASIL-rated applications.

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 .