Analog Devices Inc./Maxim Integrated MAX25210ATAA9/V+

Overview

The MAX25210ATAA9/V+ from Analog Devices is an automotive-grade, high-voltage linear regulator delivering 300mA output current with 10µA typical quiescent current, +3.5V to +36V input range, and fixed +5V output voltage. It features an open-drain active-low RESET output with 93.5% V_OUT threshold and 60µs default timeout, designed for engine control units and ADAS domain controllers requiring ultra-low standby power under cold-crank and load-dump conditions.

For engineers reviewing the MAX25210ATAA9/V+ datasheet, MAX25210ATAA9/V+ pinout, MAX25210ATAA9/V+ application, or MAX25210ATAA9/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification, exact thermal shutdown behavior (+170°C), and real-world design meaning of its 280mV dropout at 200mA - all extracted from the official Analog Devices datasheet Rev 5 (8/24).

Technical Context

The MAX25210ATAA9/V+ implements a high-voltage linear regulation architecture with internal feedback network configured for fixed +5V output via SET = GND and SETOV = OUT. Its control loop maintains ±1% output accuracy over -40°C to +125°C, with line regulation of 1mV across 6V–30V input and load regulation of 12mV from 1mA to 200mA.

RESET functionality is tightly coupled to output monitoring: it asserts low when V_OUT falls below 93.5% of nominal (4.675V at 5V output), remains asserted for ≥60µs after recovery, and also activates during ENABLE deactivation or thermal shutdown. The TIMEOUT pin supports external capacitor extension of reset delay using a 1.25ms/nF scaling factor with 1µA ramp current.

Key Specifications

Pinout & Package

MAX25210ATAA9/V+ uses an 8-pin TDFN-EP package (3mm × 3mm, exposed pad), optimized for thermal performance in space-constrained automotive modules. The exposed pad must be soldered to PCB ground plane via multiple vias to achieve θ_JA = 41°C/W on four-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX25210ATAA8/V+, the MAX25210ATAA9/V+ provides higher RESET threshold immunity to supply noise; compared with TLV73350PDBVR, it delivers automotive-grade transient robustness and thermal reliability essential for under-hood deployment.

Availability

MAX25210ATAA9/V+ is available at Aetrix Electronics and suitable for automotive ECUs, ADAS camera modules, and body control units requiring stable component supply with AEC-Q100 compliance, ultra-low quiescent current, and load-dump resilience.

Supply support for MAX25210ATAA9/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 semiconductors, serving automotive, industrial, communications, and healthcare markets.

The MAX25210 family is part of Analog Devices' automotive power management portfolio, engineered specifically for ultra-low-power, high-reliability linear regulation in harsh vehicle electrical environments.

FAQ

What is the exact RESET threshold voltage for MAX25210ATAA9/V+ at its +5V output?

The MAX25210ATAA9/V+ has a fixed RESET threshold of 93.5% of its nominal output voltage. At +5V output, this equals 4.675V. The device asserts the open-drain RESET output low when V_OUT falls below this value and holds it low for ≥60µs after recovery. This threshold is factory-trimmed and guaranteed across -40°C to +125°C ambient temperature.

Can MAX25210ATAA9/V+ be used in adjustable-output mode?

No - the MAX25210ATAA9/V+ is configured exclusively for fixed +5V output. Its top marking "BSU" and ordering code "ATAA9" indicate the 93.5% RESET variant with internal feedback network tied for +5V operation. To use adjustable output (0.6V–11V), a different variant such as MAX25210ATAD9/V+ with SET pin driven high is required.

What is the thermal shutdown behavior of MAX25210ATAA9/V+?

The MAX25210ATAA9/V+ triggers thermal shutdown at +170°C junction temperature and includes +20°C hysteresis. When tripped, the pass transistor turns off completely, halting output current. After die temperature cools to +150°C, the device automatically recovers. This cycling protects against permanent damage during sustained overload or inadequate PCB heatsinking.

Does MAX25210ATAA9/V+ require an external capacitor on the TIMEOUT pin?

No - the MAX25210ATAA9/V+ operates with a default 60µs RESET timeout when the TIMEOUT pin is left unconnected (high-impedance). An external capacitor from TIMEOUT to GND is optional and only needed to extend the delay beyond 60µs; for example, a 10nF capacitor yields ~12.5ms timeout using the 1.25ms/nF scaling factor.

Is MAX25210ATAA9/V+ pin-compatible with other variants in the MAX25210 family?

Yes - all MAX25210 variants, including MAX25210ATAA9/V+, use the identical 8-pin TDFN-EP (3mm × 3mm) package with identical pinout and footprint. This allows drop-in replacement between variants differing only in output current (300mA/200mA/100mA/50mA) and RESET threshold (93.5%/87.5%), provided the application's electrical requirements align.