Maxim Announces Industry's Lowest Quiescent Current, Highest Peak Efficiency Ultra-Small Step-Down Converter for Uninterrupted Power Supply Automotive Applications

Maxim announced ultra-compact, pin-compatible MAX20075 and MAX20076 step-down converters that help system designers build small, high-efficiency, 40V load dump applications. The MAX20075 and MAX20076 step-down converters offer the industry's smallest quiescent current (IQ) and ultra-small footprint, with integrated internal compensation. This solution requires only minimal external components and can save up to 50% of board space, making it ideal for uninterruptible power automotive applications.

The MAX20075 and MAX20076 feature a peak current mode with the industry's lowest quiescent current of only 3.5μA in a low-power operation mode, which is key to achieving the 100μA quiescent current per module required by OEMs. The converters enable pin-spread or 2.1MHz fixed operating frequencies, support low-noise operation, and meet the EMI requirements of the CISPR 25 Class 5 standard. In addition, another advantage of the 2.1MHz operating frequency and internal compensation compared to non-synchronous devices operating in the AM band is the reduction of the solution size and bill of materials (BOM). The MAX20075 and MAX20076 support a minimum on-time mode that provides a large input-to-output conversion ratio. For example, allowing the IC to switch from Vbatt input to Vout (2.1MHz operating frequency) less than 3V, which means that one auxiliary power supply can be omitted and the overall BOM cost can be reduced by US$0.30 to integrate new features into the design and achieve higher flexibility. The MAX20075 and MAX20076 comply with the AEC-Q100 standard and are available in a 3x3mm TDFN package and operate over the -40oC to +125oC ambient temperature range.

The main advantage

Industry's lowest quiescent current: IQ is only 3.5 μA, compared to 15-30 μA for traditional solutions; flexibility allows more budget to be reserved for the system; faster start-up time, lower power consumption, and shorter turn-on time
Highest Peak Efficiency: 91% Peak Efficiency Compared to Competitor Products

Reduced EMI: Spread-Spectrum Control and 2.1MHz Internal Fixed Operating Frequency to Meet EMI Requirements for CISPR 25 Class 5 Standards; Meet Uninterrupted Processing Capabilities in ADAS Applications

Evaluation

"The advancement in automotive technology has made each car add more and more complicated ECUs. Adding more electronic components to the car leads to more parasitic battery consumption, so reducing the quiescent current has become a major trend in automotive electronics design." "The MAX20075 and MAX20076 step-down converters provide another practical option for automotive manufacturers," said Zong Zhen, senior analyst at IHS Markit Automotive Electronics and Semiconductors, an information provider.

"The MAX20075 and MAX20076 deliver the overall advantage of the system with the lowest IQ on the market. This translates into higher peak efficiency, lowest on-time performance, and faster startup times." Chintan, Executive Business Manager, Automotive Group, Maxim Integrated Parikh said: "The quiescent current of 3.5μA provided by these buck converters is critical to meet OEM's stringent requirements, typically as low as 100 μA per module. This allows engineers to have built-in processing power for greater functionality and other benefits. Advanced features."

Maxim Announces Industry's Lowest Quiescent Current, Highest Peak Efficiency Ultra-Small Step-Down Converter for Uninterrupted Power Supply Automotive Applications
Keywords: MAX20075 and MAX20076 step-down converters, electric automotive applications

Author：Brittany Antonia （The author of article owns the copyright.）