MAX25249ATPB/VY+T

Overview

The MAX25249ATPB/VY+T is a four-output mini PMIC for camera applications, integrating three DC-DC converters and a high-PSRR LDO. It features one 1A high-voltage synchronous step-down converter (OUT1) operating from 4.5V to 36V input. Two low-voltage synchronous step-down converters (OUT2, OUT3) provide 0.8V to 3.9875V output at 1.2A each. The fourth output (OUT4) is a low-noise LDO. All buck converters achieve ±1.5% accuracy over load, line, and temperature ranges with ±1.3% OV/UV monitoring. The device operates at a fixed 2.2MHz frequency, supports AEC-Q100 Grade 1 qualification, and functions within -40°C to +125°C.

Feature Summary

• Integrates three synchronous buck converters and one high-PSRR LDO in a compact package
• Provides overvoltage and undervoltage fault monitoring with error communication via RESET pin
• Features programmable spread-spectrum frequency modulation to minimize radiated electromagnetic emissions
• Compliant with ASIL-B safety ratings for automotive camera systems

Applications

• Surround-view cameras
• Rear-view cameras
• High-megapixel camera sensors
• Camera serializers and MCUs

Procurement Notes

Verify the specific suffix 'TPB' against official Analog Devices documentation to confirm the exact output configuration, as variations exist within the MAX25249 family. Ensure the component meets ASIL-B requirements for your target application. Confirm availability through authorized distributors, as supply status may vary. Validate that the 20-WETQFN package dimensions match your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when designing power supplies for automotive camera systems requiring ASIL-B compliance. It is suitable for powering image sensors, serializers, and MCUs with integrated sequencing. Consider the 2.2MHz switching frequency for noise immunity and small passive size. Verify that the input voltage range of 4.5V to 36V matches your system's power source, such as PoC or car battery.

Part Context

The MAX25249ATPB/VY+T belongs to the MAX25249/MAX25249B family of mini PMICs designed specifically for automotive camera applications. These devices consolidate multiple power rails into a single solution, reducing board space and complexity compared to discrete designs. The family is characterized by high efficiency, precise voltage regulation, and robust protection features tailored for harsh automotive environments.

Replacement Considerations

Check the MAX25249BATPE/VY+T and MAX25249BATPB/VY+T datasheets for potential pin-compatible alternatives within the same family. Verify if the specific output current ratings and factory-settable voltages of these variants meet your design requirements before substitution.