Maxim’s new MAX16903 and MAX16904 are automotive-grade, synchronous step-down converters that consume only 25 μA at no-load and deliver 1 A and 600 mA, respectively.
The 2,1 MHz devices are optimised for operation over the 3,5 V to 28 V range. Designed to withstand the extreme battery-voltage conditions in automotive applications, they tolerate load-dump transients up to 42 V and cold-crank excursions down to 3,5 V. The ICs are capable of running at high duty cycle to maintain a steady output voltage during cold-crank and start/stop conditions.
Both devices integrate high- and low-side FETs to eliminate the need for an external Schottky diode, thus saving both space and cost while improving power efficiency. Additionally, this architecture enables the devices to operate in skip mode for lower current consumption or in forced PWM mode for improved EMI performance. They have an open-drain, power-good output to ease power supply sequencing. Protection features include over-current protection and thermal shutdown.
The MAX16903 and MAX16904 are fully specified over the -40°C to +125°C automotive temperature range. They are AEC-Q100 qualified and available in thermally enhanced, 16-pin TSSOP and 10-pin TDFN packages.
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