Analog Devices Inc./Maxim Integrated MAX25300BATA/V+T

Overview

MAX25300BATA/V+T from Analog Devices is a low-noise, 500mA automotive-grade LDO linear regulator with resistor-adjustable output (0.6V–5.3V), 12µVRMS output noise (10Hz–100kHz), ±1% DC accuracy over load/line/temperature, and integrated active-high POK output. It operates from 1.7V to 5.5V input, requires only 100mV dropout at full load, and targets high-fidelity audio power rails and high-resolution ADC reference supplies in AEC-Q100-compliant systems.

For engineers reviewing the MAX25300BATA/V+T datasheet, MAX25300BATA/V+T pinout, MAX25300BATA/V+T application, or MAX25300BATA/V+T equivalent, key selection criteria include its POK functionality, 365µA no-load quiescent current, 70dB PSRR at 10kHz, stability with ≥2µF ceramic output capacitance, and thermal shutdown behavior at +165°C - all critical for automotive infotainment and ADAS sensor power domains.

Technical Context

The MAX25300BATA/V+T implements a pMOS pass transistor architecture with internal 0.6V reference and external resistor feedback (FB pin) to set output voltage across 0.6V–5.3V. Its BYP pin controls soft-start slew rate via an external capacitor (0.001µF–0.1µF), directly linking startup behavior to layout design.

It integrates reverse-current protection triggered when VIN falls 10mV below VOUT, thermal shutdown cycling between +150°C (restart) and +165°C (shutdown), and open-drain POK output asserting high after VOUT reaches 91% of regulation - all verified under AEC-Q100 Grade 0 (-40°C to +125°C) conditions.

Key Specifications

Pinout & Package

MAX25300BATA/V+T uses a 2mm × 2mm, 8-pin TDFN package (package code T822+3C) with exposed thermal pad (EP) requiring connection to PCB ground plane via thermal vias for junction-to-ambient θJA = 102°C/W (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 NCP115ASN330T2G, MAX25300BATA/V+T uniquely combines AEC-Q100 Grade 0 qualification, POK output, resistor-adjustable 0.6V–5.3V range, and 12µVRMS noise - making it the sole option for automotive ADAS sensor power where programmability, reset signaling, and ultra-low noise are co-required.

Availability

MAX25300BATA/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, high-resolution sensor signal chains, and telematics core logic requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for MAX25300BATA/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and signal chain solutions.

The MAX25300BATA/V+T belongs to Analog Devices' automotive-qualified LDO portfolio, designed specifically for noise-sensitive power domains in AEC-Q100-compliant electronic control units - emphasizing low noise, high PSRR, and functional safety-aware features like POK and thermal cycling.

FAQ

What is the minimum output capacitance required for stable operation of the MAX25300BATA/V+T?

The MAX25300BATA/V+T requires a minimum 2µF ceramic output capacitor (X5R/X7R dielectric) for guaranteed stability across temperature and DC bias. This value accounts for capacitance derating - for example, a 4.7µF/6.3V X5R capacitor (Murata GRM155R60J475ME47) maintains ~2.9µF at 1.8V bias. Using less than 2µF risks oscillation and poor transient response, especially under 500mA load steps.

Does the MAX25300BATA/V+T support adjustable soft-start, and how is it configured?

Yes, the MAX25300BATA/V+T supports programmable soft-start via the BYP pin. Connecting a capacitor (0.001µF–0.1µF) between BYP and OUT sets the startup slew rate using the formula: StartupSlewRate = (5V/ms) × (0.01µF / CBYP). For instance, a 0.01µF capacitor yields 5V/ms, limiting inrush current to ~50mA when charging a 10µF output bank - critical for preventing bus droop in multi-rail automotive systems.

What is the function and electrical behavior of the POK pin on the MAX25300BATA/V+T?

The POK pin on the MAX25300BATA/V+T is an open-drain output that asserts high when the regulated output reaches 91% of its target voltage (±3%), providing a hardware reset signal for microcontrollers. It requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V). During overload or shutdown, POK pulls low. Its 100mV low-level voltage at 1mA sink current ensures reliable logic-level detection across voltage domains.

How does the MAX25300BATA/V+T protect against reverse current flow from output to input?

The MAX25300BATA/V+T incorporates active reverse-current protection that disables the pass element when VIN drops 10mV below VOUT - such as during battery disconnect or cold-cranking events. This opens the pMOS body diode path, blocking reverse current and preventing output capacitor discharge into the input rail. Unlike passive diode solutions, this feature adds zero forward voltage drop and zero quiescent current penalty during normal operation.

Is the MAX25300BATA/V+T qualified for automotive applications, and what standards does it meet?

Yes, the MAX25300BATA/V+T is fully qualified per AEC-Q100 Grade 0 (-40°C to +125°C ambient), with tested performance across temperature, humidity, mechanical shock, and ESD (HBM ±2kV). Its 2mm × 2mm TDFN package with exposed thermal pad meets automotive thermal requirements, and the "/V" suffix confirms automotive qualification. It is intended for use in engine control, ADAS, infotainment, and telematics systems requiring long-term reliability under harsh environmental stress.