Analog Devices Inc./Maxim Integrated MAX25210ATAA8/V+

Overview

The MAX25210ATAA8/V+ from Analog Devices is an automotive-grade, high-voltage linear regulator delivering 300mA output current with only 10µA typical quiescent current, supporting fixed +3.3V or +5V outputs (this variant uses 87.5% RESET threshold), and operating from +3.5V to +36V input under -40°C to +125°C ambient conditions. It features open-drain active-low RESET, thermal shutdown, short-circuit protection, and +42V transient tolerance for load-dump resilience in vehicle power systems.

For engineers reviewing the MAX25210ATAA8/V+ datasheet, MAX25210ATAA8/V+ pinout, MAX25210ATAA8/V+ application, or MAX25210ATAA8/V+ equivalent, key selection criteria include its 87.5% RESET threshold, 300mA output capability, 280mV dropout at 200mA, TDFN-EP 3mm × 3mm package, and AEC-Q100 qualification - all critical for low-power always-on automotive modules requiring cold-crank operation and system-level reset coordination.

Technical Context

The MAX25210ATAA8/V+ implements a high-voltage NPN pass transistor architecture with internal feedback networks for fixed-output modes and external resistive divider support for adjustable outputs (0.6V–11V). Its control logic integrates UVLO (2.2V falling), thermal shutdown (+170°C trip, +20°C hysteresis), and ENABLE-driven sequencing with 0.25µA internal pulldown.

RESET generation uses a precision comparator monitoring OUT against 87.5% of nominal VOUT, asserting low for ≥60µs after recovery; timeout extension is achieved via TIMEOUT pin capacitance (1.25ms/nF scaling). The device maintains stability with only 2.2µF output capacitance and tolerates +42V transients on IN and ENABLE pins.

Key Specifications

Pinout & Package

MAX25210ATAA8/V+ is housed in an 8-pin TDFN-EP (exposed pad) package, 3mm × 3mm, with thermal performance optimized for automotive PCBs using multilayer ground planes and vias to the exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage, ultra-low-I_Q linear regulator applications.

Compared with MAX25210ATAA9/V+, the MAX25210ATAA8/V+ provides earlier RESET assertion for improved fault responsiveness; compared with TLV73333PDBVR, it delivers direct battery connectivity, AEC-Q100 qualification, and integrated RESET - making it uniquely suited for primary automotive power domains.

Availability

MAX25210ATAA8/V+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, and telematics gateways requiring stable component supply with long-term lifecycle assurance and AEC-Q100 compliance.

Supply support for MAX25210ATAA8/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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving automotive, industrial, communications, and consumer markets with precision power, sensing, and timing solutions.

The MAX25210ATAA8/V+ belongs to the MAX25210 automotive ultra-low quiescent current linear regulator family, designed specifically for always-on vehicle subsystems needing <15µA standby current, load-dump resilience, and integrated system supervision.

FAQ

What output voltage options does the MAX25210ATAA8/V+ support?

The MAX25210ATAA8/V+ supports both +3.3V and +5V fixed output voltages, selected by connecting the SETOV pin to GND or OUT respectively, with SET grounded. It does not support adjustable output in this specific variant's default configuration unless reconfigured with external resistors - though the underlying silicon permits it via SET pin biasing above 2.4V.

How does the RESET function operate on the MAX25210ATAA8/V+?

The MAX25210ATAA8/V+ features an open-drain, active-low RESET output that asserts low when the regulated output voltage falls below 87.5% of its nominal value. After VOUT recovers, RESET remains low for a minimum of 60µs; this delay can be extended using a capacitor on the TIMEOUT pin. RESET also activates during ENABLE deactivation and thermal shutdown.

Is the MAX25210ATAA8/V+ qualified for automotive use?

Yes, the MAX25210ATAA8/V+ is AEC-Q100 qualified for Grade 1 (-40°C to +125°C ambient), with built-in thermal shutdown (+170°C trip), short-circuit protection, +42V transient tolerance, and operation across the full automotive battery voltage range - making it suitable for under-hood and chassis-mounted electronic control units.

What is the minimum output capacitance required for stable operation of the MAX25210ATAA8/V+?

The MAX25210ATAA8/V+ is stable with a minimum 2.2µF low-ESR ceramic capacitor (X7R/X5R) on the OUT pin when configured for fixed +3.3V or +5V outputs. For adjustable configurations, a 10µF capacitor is recommended. Using larger values (e.g., 22µF) further improves load-transient response and PSRR performance.

Can the MAX25210ATAA8/V+ be used in cold-crank automotive conditions?

Yes, the MAX25210ATAA8/V+ maintains regulation during cold-crank events due to its wide +3.5V to +36V input range and low 280mV dropout voltage at 200mA. This allows it to sustain a stable 5V output even when battery voltage drops to ~4.5V - critical for keeping safety-critical ECUs operational during engine start.