Analog Devices Inc./Maxim Integrated MAX25302BATD/V+T

Overview

MAX25302BATD/V+T 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+T datasheet, MAX25302BATD/V+T pinout, MAX25302BATD/V+T application, or MAX25302BATD/V+T equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 qualification, real-world soft-start control via BYP capacitor, and precise POK threshold behavior for automotive power sequencing.

Technical Context

The MAX25302BATD/V+T implements a pMOS-based LDO architecture with internal 0.6V reference and external resistor feedback (FB/GS pins) to support programmable output from 0.6V to 5.0V. It features active-high open-drain POK with 88–94% VOUT regulation threshold and built-in reverse-current protection triggered when VIN falls 10mV below VOUT.

Thermal shutdown activates at +165°C (rising) and releases at +150°C (falling), enabling fault recovery under sustained overload. Soft-start slew rate is precisely set by the BYP-to-OUT capacitor (1nF–100nF), with 47nF yielding ~1.06V/ms startup for 22μF COUT - distinct from short-circuit recovery, which operates ~500× slower.

Key Specifications

Pinout & Package

MAX25302BATD/V+T 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 on four-layer boards (θJA = 41°C/W).

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+T uniquely combines AEC-Q100 Grade 0, adjustable 0.6V–5.0V output with FB/GS, integrated POK, and reverse-current protection - making it the only option among the three qualified for primary power rails in safety-critical ADAS and powertrain modules.

Availability

MAX25302BATD/V+T is available at Aetrix Electronics and suitable for automotive camera modules, high-resolution data-acquisition systems, and ADAS radar signal chains requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for MAX25302BATD/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 since 1965.

The MAX25302 series belongs to Analog Devices' automotive power management portfolio, engineered specifically for ultra-low-noise, high-accuracy LDO regulation in safety-critical ECU subsystems where PSRR, thermal resilience, and AEC-Q100 compliance are non-negotiable.

FAQ

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

The MAX25302BATD/V+T supports an adjustable output voltage range of 0.6V to 5.0V, set externally using a resistor divider between FB and GND. The internal 0.6V reference ensures accurate scaling - for example, 2.4V output requires R1 = 900kΩ with R2 = 300kΩ. This flexibility enables direct compatibility with diverse SoC core and I/O voltage requirements across automotive platforms.

How does the POK pin on the MAX25302BATD/V+T behave during startup and fault conditions?

The POK pin on the MAX25302BATD/V+T is an active-high open-drain output that asserts high only when VOUT reaches ≥91% of its target value (typical threshold). During startup, it remains low until regulation is achieved; during overcurrent, thermal shutdown, or EN deactivation, it pulls low immediately. A pull-up resistor to a compatible supply (e.g., 3.3V or 5V) is required to generate a valid reset signal for downstream logic.

What is the minimum output capacitance required for stable operation of the MAX25302BATD/V+T?

The MAX25302BATD/V+T requires a minimum of 8μF total output capacitance (X5R or X7R ceramic) at the OUT pins for guaranteed stability across temperature and DC bias. In practice, 22μF is recommended - as shown in the typical application circuit - to ensure adequate phase margin and transient response. The capacitor must maintain ≥8μF under worst-case voltage and temperature conditions.

Does the MAX25302BATD/V+T provide reverse-current protection, and how does it operate?

Yes, the MAX25302BATD/V+T includes integrated reverse-current protection that disables the pMOS pass device when VIN falls 10mV below VOUT. This prevents backfeed from large output capacitors during input supply removal - critical in automotive stop-start systems. Unlike diode-based solutions, this feature introduces no forward voltage drop or power loss during normal operation.

What thermal design considerations apply to the MAX25302BATD/V+T in a 2A automotive application?

For 2A continuous operation, the MAX25302BATD/V+T requires connection of its exposed pad (EP) to a multilayer PCB ground plane using ≥4 thermal vias (0.3mm diameter) to minimize θJA. On a four-layer board, θJA = 41°C/W enables ≤125°C junction temperature at +85°C ambient - well within the AEC-Q100 Grade 0 limit. Layout must avoid thermal isolation of EP and ensure low-impedance GND return paths for IN and OUT capacitors.