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

Small Automotive PMIC for ADAS Applications Requiring ASIL

Please check latest availability status for a specific part variant.


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.

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


  • ADAS
  • Infotainment
  • SOC Power
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesVIN
Oper. Freq.
Output OVP
Output UVP
Reset Output
Avg. Current Mode Control
Current Limit
Fixed Freq./PWM
Internal Switch
Sync. Rectifier
See Data Sheet
See All Multifunction PMICs (85)

Part NumberVOUT1
VOUT1 Tolerance
Switch TypeSynchronous SwitchingPower Good SignalAlternate TopologyPackage/Pins
MAX20419 0.85.320.83InternalYesYes
See All Step-Down/Up Switching Regulators (31)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX20419EVKIT: Evaluation Kit for the MAX20419

Quality and Environmental Data

Request Reliability Report for: MAX20419 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX20419ATGB/V+
  • MAX20419ATGC/V+
  • MAX20419ATGD/V+
  • MAX20419ATGE/V+
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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