Analog Devices Inc./Maxim Integrated MAX25308AATEA/V+T

Overview

The MAX25308AATEA/V+T from Analog Devices is a three-output automotive-grade LDO linear regulator delivering 600mA on OUT1 and 300mA each on OUT2/OUT3, with 37µVRMS output noise (10Hz–100kHz), ±1.25% DC accuracy over load/line/temperature, and factory-programmed 1.2V/1.8V/3.3V outputs - deployed in ADAS domain controllers requiring ultra-low-noise, high-accuracy power for image signal processors and radar SoCs.

For engineers reviewing the MAX25308AATEA/V+T datasheet, MAX25308AATEA/V+T pinout, MAX25308AATEA/V+T application, or MAX25308AATEA/V+T equivalent, key selection criteria include its Grade 1 automotive temperature range (−40°C to +125°C), independent enable/RESET per channel, 155mV max dropout at full load, and 3mm × 3mm TQFN-16 package with exposed pad for thermal management.

Technical Context

The MAX25308AATEA/V+T integrates three independent low-dropout regulators sharing a common bias circuit powered by IN1, requiring IN1 to be active before enabling OUT2/OUT3. Each channel uses a PMOS pass device with reverse current protection triggered when IN drops 10mV below VOUT.

Its architecture includes individual BYP pins (10nF typical) setting soft-start slew rate and reference noise filtering, factory-configured RESET hold times (0.5ms for this variant), and thermal shutdown at 170°C with 15°C hysteresis - all operating within a single 3mm × 3mm TQFN package rated for continuous 125°C ambient operation.

Key Specifications

Pinout & Package

MAX25308AATEA/V+T is housed in a 3mm × 3mm, 16-pin TQFN package with exposed thermal pad (EP), optimized for automotive PCB layouts requiring high thermal efficiency and space-constrained ECU designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output LDO applications.

Compared with TPS7H3301-SP and NCP114AMX330TBG, the MAX25308AATEA/V+T uniquely combines AEC-Q100 Grade 1 qualification, factory-set triple outputs, and integrated per-rail RESET in a 3mm × 3mm footprint - making it optimal for cost- and space-constrained automotive ECUs requiring functional safety support.

Availability

MAX25308AATEA/V+T is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment head units, and telematics control units requiring stable component supply with full automotive lifecycle support.

Supply support for MAX25308AATEA/V+T 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.

The MAX25308AATEA/V+T belongs to Analog Devices' automotive power management portfolio, engineered specifically for low-noise, high-accuracy power delivery in safety-critical ADAS and infotainment systems operating across extended temperature ranges.

FAQ

What are the factory-programmed output voltages of the MAX25308AATEA/V+T?

The MAX25308AATEA/V+T has fixed factory-programmed outputs: OUT1 = 1.2V (600mA), OUT2 = 1.8V (300mA), and OUT3 = 3.3V (300mA). These values are laser-trimmed during manufacturing and cannot be adjusted externally - eliminating the need for feedback resistors and ensuring consistent performance across production lots. This configuration is explicitly defined in the Ordering Information table for part number MAX25308AATEA/V+.

Does the MAX25308AATEA/V+T support independent power sequencing between its three outputs?

Yes, the MAX25308AATEA/V+T supports full independent sequencing via dedicated EN1, EN2, and EN3 inputs. Because IN1 powers the internal bias circuitry, OUT1 must be enabled before OUT2 or OUT3 can be activated - enforcing a hardware-enforced sequence. However, software can delay EN2/EN3 assertion to achieve custom ramp-up timing, and each channel's RESET output provides independent fault signaling for safety-critical diagnostics.

What thermal design considerations apply to the MAX25308AATEA/V+T in automotive applications?

The MAX25308AATEA/V+T requires connection of its exposed pad (EP) to a low-thermal-resistance ground plane using ≥4 thermal vias to maintain junction temperature ≤150°C at full load. With θJA = 46.47°C/W on a four-layer board, continuous 600mA at 1.2V (0.72W dissipation) raises die temperature by ~33°C above ambient - necessitating adequate copper area and airflow in sealed ECU enclosures operating up to +125°C ambient.

How does the MAX25308AATEA/V+T handle reverse current during power-down events?

The MAX25308AATEA/V+T includes integrated output-to-input reverse current protection that activates when IN drops 10mV below the associated VOUT. This shuts off the PMOS pass device and opens the body diode path, preventing backfeed from higher-voltage rails (e.g., 3.3V OUT3 into 1.8V IN2 during brownout). Unlike discrete diode solutions, this feature adds zero forward voltage drop and zero quiescent current penalty during normal operation.

What is the RESET hold time configuration for the MAX25308AATEA/V+T?

The MAX25308AATEA/V+T has a factory-configured RESET hold time of 0.5ms (Option 1), as specified in the Ordering Information table for part number MAX25308AATEA/V+. This duration is fixed and non-adjustable - ensuring deterministic reset pulse width for downstream microcontrollers during power-up or fault recovery, without requiring external timing components or firmware calibration.