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The MAX20419ATGO/V is a high-efficiency, 3-output, low-voltage DC-DC converter IC. OUT1 boosts the input supply to 5V at up to 750mA, while the two synchronous buck converters, with input operating voltages from 3.0V to 5.5V, provide output voltages from 0.8V to 3.8V at up to 3.6A. The boost converter and buck converter have output errors of ±1.9% and ±1.4% over load, line and temperature ranges, respectively. The ICs feature a 2.2MHz fixed-frequency pulse-width modulation (PWM) mode for better immunity and load transient response performance, and a pulse-frequency modulation mode (hopping) for improved efficiency under light-load conditions. the 2.2MHz operating frequency supports the use of all-ceramic capacitors and effectively reduces external component count. Programmable spread spectrum modulation fully reduces electromagnetic emissions. An integrated low RDS(ON) switch improves efficiency at heavy loads, making the layout simpler than discrete solutions.

The IC provides factory preset output voltages. Other features include soft-start, over-current, and over-temperature protection.The MAX20419ATGO/V also features a variety of redundancy and diagnostic functions to support ASIL-rated applications.

Benefits and Features

Versatile, Small Form Factor

750mA synchronous boost converter

Fixed output: 5V

Up to 3.6A dual synchronous buck converter

Factory configurable (0.8V to 3.8V) in 25mV steps

Programmable window watchdog

Operating supply voltage range: 3.0V to 5.5V

2.2MHz operating frequency

Separate active-low RESET_ outputs

High accuracy performance

Output Voltage Accuracy (OUT1): ±1.9

Output Voltage Accuracy (OUT2, OUT3): ±1.4%

Overvoltage/Undervoltage Monitoring (OUT1-OUT3, PV): ±1.3%

Excellent load transient performance

Diagnostic and redundant circuitry

ASIL-C compliant

Redundant reference voltage sources

Fail-safe feature for open pins

Short-circuit pin detection active low - RESET1-RESET3

Input overvoltage detection

Stable performance for automotive environments

Current mode, forced PWM, and jump mode operation

Over temperature and short circuit protection

24-pin (4mm x 4mm) TQFN package with exposed pads

-40 °C to +125 °C automotive temperature range

Applications

ADAS

Infotainment systems

SOC power supplies

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