Ultra Low mini buck converter for Automotive Applications

Analog Devices - Maxim MAX20075 Buck Converter

The MAX20075 is a compact, efficient synchronous buck converter capable of delivering up to 0.6A of output current. It features integrated high-side and low-side switches for rapid synchronous rectification for maximized efficiency. It’s suited for automotive, industrial, and portable electronics applications.&nbsp;The buck converter can convert higher input voltages (3.5V to 36V) into regulated 3.3V or 5V outputs. It also features a programmable output voltage of 1 to 10 Volts. The converter has a miniaturized form factor that saves board space, while low EMI and spread-spectrum frequency modulation ensure clean operation.&nbsp;<h2>High Accuracy Voltage Conversion for Low-Power Applications</h2>The MAX20075 Buck converter provides a flexible option for low-power applications, ensuring optimal conversion accuracy. Based on the input voltage range, the conversion accuracy varies according to the following scheme:<ul><li>&nbsp;±2% accuracy for the nominal input voltage range of 6 to 18 Volts. This accuracy is provided for the fixed output options of 3.3V and 5V.&nbsp;</li><li>±1.5% accuracy for adjustable output voltage range from 1V to 10V. This can be achieved with an externally connected adjustable resistor.</li></ul>Moreover, the MAX20075 buck converter operates at a reasonably high frequency of up to 2.1MHz, contributing to its small form factor. More importantly, it expands the conversion range allowing greater input-to-output conversion ratios. The high frequency also means smaller external component size and reduced output ripples. It also cuts the chances of AM interference.The device has a 20nS minimum on-time capability. The user can monitor the output Voltage via PGOOD signal. The simplistic design also allows the users to operate it like a plug and play device.&nbsp;<h2>Current-Mode-Control Architecture for Reduced Board Space</h2>The MAX20075 features a current-mode control architecture. This architecture monitors the inductor's peak current to regulate output voltage. It offers several advantages like&nbsp;<ul><li>Fast transient response&nbsp;</li><li>Inherent current limiting for protection against short circuits.&nbsp;</li></ul>By comparing the sensed inductor current to a reference, the controller adjusts the duty cycle of the high-side and low-side switches accordingly, ensuring precise output voltage regulation.<h2>Industrial-Grade Protection Features for Safe Operations</h2>The MAX20075 Buck Converter is designed for safe operations thanks to the standard protection features such as:<ul><li>Overcurrent Protection - Limits the output peak current to 1.9A with a 12% accuracy. The device turns off when OUT is less than 50% of the output voltage and overcurrent is detected. Moreover, the device attempts a soft start every 7ms and stays off if the short circuit still exists.&nbsp;&nbsp;</li><li>Thermal Overload Protection - Automatically turns off if the device’s junction temperature exceeds 175 degrees Celsius. It attempts a soft start once the temperature reduces by 15 degrees Celsius.&nbsp;</li></ul>The industrial-grade protection features and small form factor make MAX20075 a viable option for various industrial applications, high-voltage DC-DC conversions, and Automotive needs.

MAX20075 Datasheet and Product Info

MAX20075/MAX20076/MAX25276

Product Type

Input Voltage Range

Programmable Output Voltage Range

Fixed Output Voltage Range

Output Current

Temperature Range

Applications

The MAX20075 is a compact, efficient synchronous buck converter capable of delivering up to 0.6A of output current. It features integrated high-side and low-side switches for rapid synchronous rectification for maximized efficiency. 

Product Type	Synchronous DC-DC Buck Converter
Input Voltage Range	3.5 to 36 Volts
Programmable Output Voltage Range	1 to 10 Volts
Fixed Output Voltage Range	3.3V and 5V
Output Current	600 mA
Temperature Range	-40 to +125 degrees Celsius