Analog Devices Inc./Maxim Integrated MAX25302BATD/V+

Overview

MAX25302BATD/V+ from Analog Devices is a 2A automotive-grade low-noise LDO linear regulator with adjustable 0.6V–5.0V output, 5.1μVRMS output noise (10Hz–100kHz), ±1% DC accuracy over load/line/temperature, and 100mV max dropout at 2A - designed for high-resolution data-acquisition systems requiring ultra-low-noise power rails.

For engineers reviewing the MAX25302BATD/V+ datasheet, MAX25302BATD/V+ pinout, MAX25302BATD/V+ application, or MAX25302BATD/V+ equivalent, key selection considerations include its AEC-Q100 qualification, active-high POK signal for safe system startup, programmable soft-start via BYP capacitor, reverse-current protection, and compatibility with minimal 8μF output capacitance.

Technical Context

The MAX25302BATD/V+ implements a pMOS-based LDO architecture optimized for low-noise operation and high PSRR (>70dB at 10kHz), using an internal 0.6V reference and external FB resistor divider to set output voltage. Its BYP pin controls both noise filtering and soft-start slew rate via a 1nF–100nF capacitor.

It integrates active protection including overcurrent limiting (2.2–3.4A trip), thermal shutdown (165°C turn-off / 150°C recovery), and input-to-output reverse-current blocking triggered when VIN falls 10mV below VOUT - critical for automotive power-down transients.

Key Specifications

Pinout & Package

MAX25302BATD/V+ is housed in a 3mm × 3.5mm, 14-pin TDFN package with exposed thermal pad (EP), optimized for automotive PCB space constraints and thermal dissipation (θJA = 41°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS7A8300RGRT and STLQ015M25R, the MAX25302BATD/V+ uniquely combines AEC-Q100 qualification, 2A output, 5.1μVRMS noise, and integrated POK in a 3mm × 3.5mm TDFN - making it the only drop-in solution for automotive high-current analog rails requiring guaranteed startup sequencing and thermal robustness.

Availability

MAX25302BATD/V+ is available at Aetrix Electronics and suitable for automotive camera modules, high-resolution audio systems, and industrial data-acquisition front-ends requiring stable component supply under AEC-Q100 compliance and extended temperature operation.

Supply support for MAX25302BATD/V+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.

The MAX25302 series belongs to Analog Devices' automotive power management portfolio, engineered specifically for low-noise, high-accuracy power delivery in safety-critical ADAS and infotainment subsystems.

FAQ

What output voltage range does the MAX25302BATD/V+ support?

The MAX25302BATD/V+ supports an adjustable output voltage range of 0.6V to 5.0V, set via an external resistor divider connected to the FB pin. The internal feedback reference is precisely trimmed to 0.6V, enabling accurate scaling across the full range without calibration. This flexibility allows the MAX25302BATD/V+ to replace multiple fixed-output regulators in multi-rail systems.

Does the MAX25302BATD/V+ include power-good signaling?

Yes, the MAX25302BATD/V+ features an active-high open-drain POK (Power-OK) output that asserts high when VOUT reaches 91% of its regulated value. It deasserts during overcurrent, thermal shutdown, or EN disable. A pull-up resistor to an external supply is required. This function is absent in the MAX25302A variant and is a key differentiator of the MAX25302BATD/V+ for system-level power sequencing.

What is the minimum output capacitance required for stability with the MAX25302BATD/V+?

The MAX25302BATD/V+ is stable with a minimum 8μF ceramic output capacitance (X5R or X7R dielectric), including voltage and temperature derating. This is significantly lower than many legacy LDOs requiring ≥22μF, reducing PCB area and cost. The device remains stable across the full 8–22μF range specified in the datasheet, with optimal transient response near 22μF.

How does the MAX25302BATD/V+ handle reverse current during input power-down?

The MAX25302BATD/V+ incorporates integrated reverse-current protection that disables the pMOS pass device when VIN falls 10mV below VOUT, preventing >800mA reverse current flow. This eliminates the need for external blocking diodes or back-to-back MOSFETs in automotive systems where battery disconnect or cold-cranking events cause VOUT > VIN transients - a critical feature confirmed in the Absolute Maximum Ratings and Detailed Description sections.

Is the MAX25302BATD/V+ qualified for automotive applications?

Yes, the MAX25302BATD/V+ is AEC-Q100 qualified (Grade 0, -40°C to +125°C) and manufactured in an automotive-grade process. The "/V+" suffix explicitly denotes automotive qualification and RoHS compliance. Its design includes enhanced ESD tolerance, extended temperature validation, and failure-mode analysis per AEC standards - making it suitable for under-hood and safety-critical ADAS modules.