MAX25249ATPAA/VY+T

Overview

The MAX25249ATPAA/VY+T is a high-voltage, ASIL-B certified mini Power Management IC (PMIC) designed for automotive camera sensors. It integrates four synchronous buck converters and one low-dropout regulator (LDO). The device operates with an input voltage range of 4.5 V to 36 V. Output voltages are adjustable from 800 mV to 3.9875 V for the switching regulators, while the LDO provides a fixed output between 3 V and 4 V at up to 1 A. The switching frequency is set at 2.2 MHz. It is housed in a 20-pin WETQFN package with wettable flanks, rated for operation from -40°C to +125°C.

Feature Summary

• ASIL-B functional safety certification for automotive camera applications
• Integrated multi-output topology combining synchronous buck and LDO regulators
• High-voltage input capability supporting direct battery connection
• Compact footprint with wettable flank package for enhanced solder reliability

Applications

• Automotive surround view camera systems
• Advanced Driver Assistance Systems (ADAS) sensor power management
• Vehicle infotainment camera modules
• High-reliability automotive imaging subsystems

Procurement Notes

Verify the specific suffix 'ATPAA' against official Analog Devices documentation to confirm pinout and feature configuration, as variations exist within the MAX25249 family. Confirm availability status directly with the manufacturer or authorized distributors, as supply constraints may apply to this specific variant. Ensure the selected packaging matches the required reel quantity for automated assembly processes.

Selection Notes

Select this component when designing for ASIL-B compliant camera architectures requiring a single-chip solution for multiple voltage rails. The integrated synchronous buck topology offers higher efficiency compared to discrete solutions. Consider the 2.2 MHz switching frequency for balancing EMI performance and external component size. Verify that the thermal characteristics of the 20-WETQFN package meet the system's heat dissipation requirements under maximum load conditions.

Part Context

This part belongs to the MAX25249 series of mini PMICs developed by Maxim Integrated, now part of Analog Devices. The series targets the growing demand for compact, high-integrity power solutions in modern vehicle electronics. Variants within the series differ primarily in output configurations, package types, and safety integrity levels, allowing designers to tailor power delivery to specific sensor requirements without increasing board space.

Replacement Considerations

The MAX25249BATPA/VY+ and MAX25249BATPE/VY+T are related variants within the same family. Verify if the alternative part number meets the specific ASIL-B requirements and output current specifications needed for the application before substitution.