Analog Devices Inc./Maxim Integrated MAX6771TALD2+

Overview

MAX6771TALD2+ from Maxim Integrated is an automotive-grade micropower linear regulator with dual enable inputs (ENABLE1/ENABLE2), 5V fixed output, 4V–72V input range, 31µA quiescent current, and 12.5ms capacitor-adjustable reset timeout. It delivers up to 100mA and integrates overtemperature/short-circuit protection for always-on vehicle modules such as body control units and telematics gateways.

For engineers reviewing the MAX6771TALD2+ datasheet, MAX6771TALD2+ pinout, MAX6771TALD2+ application, or MAX6771TALD2+ equivalent, key selection criteria include dual-enable sequencing for ignition/bus transceiver control, AEC-Q100-compliant operation from –40°C to +125°C, low-dropout performance at high ambient temperatures, and integrated supervisor functionality with adjustable reset timing.

Technical Context

The MAX6771TALD2+ implements a high-voltage linear regulation architecture with dual active-high enable inputs-ENABLE1 for ignition-switch control and ENABLE2 for bus transceiver wake-up-enabling flexible power-on sequencing in automotive domains. Its internal reference (1.233V) and feedback path support precise 5V output regulation across wide line/load/temperature conditions.

It features an open-drain active-low RESET output with fixed threshold of 4.375V (M-grade) and externally adjustable timeout via TIMEOUT pin capacitor (12.5ms nominal). The device includes thermal shutdown at +160°C with 20°C hysteresis and short-circuit current limiting to 150–250mA, ensuring robust fault handling without external circuitry.

Key Specifications

Pinout & Package

MAX6771TALD2+ uses a thermally enhanced 3mm × 3mm, 8-pin TDFN-EP package (package code T833+2) with exposed pad (EP) connected internally to GND for optimal thermal dissipation (θ_JA = 41°C/W on multilayer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive linear regulator applications.

Compared with MAX6772TALD2+, the MAX6771TALD2+ offers lower reset threshold for tighter brownout detection; compared with TPS7B8750QKVURQ1, it provides superior sequencing flexibility and integrated reset timing control-critical for complex automotive domain controllers.

Availability

MAX6771TALD2+ is available at Aetrix Electronics and suitable for automotive body electronics, telematics systems, and ADAS camera ECUs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6771TALD2+ 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX6765–MAX6774B family delivers micropower, high-voltage linear regulators with integrated supervision specifically for automotive always-on modules demanding ultra-low I_Q, wide input range, and AEC-Q100 reliability.

FAQ

What is the function of the TIMEOUT pin on the MAX6771TALD2+?

The TIMEOUT pin on the MAX6771TALD2+ sets the duration of the RESET assertion after a brownout event. When connected to GND via a capacitor, it configures the reset timeout period; for MAX6771TALD2+, the D2 suffix indicates a nominal 12.5ms timeout. Leaving TIMEOUT unconnected selects the internal fixed timeout value. This pin enables precise µP initialization timing without external timers.

Does the MAX6771TALD2+ support adjustable output voltage?

No, the MAX6771TALD2+ provides a fixed 5.0V output. Its part number suffix "TAL" denotes the 3.3V/5.0V output family with "M"-grade reset threshold (4.375V), and "D2" specifies the 12.5ms reset timeout. Adjustable output versions (e.g., MAX6773/MAX6774) use SET pin configuration and different suffixes; MAX6771TALD2+ has no SET pin and is not configurable.

Is the MAX6771TALD2+ AEC-Q100 qualified?

Yes, the MAX6771TALD2+ is AEC-Q100 qualified (Grade 0, –40°C to +150°C junction). Though the datasheet notes qualification applies to specific variants including MAX6771TA_D_/V+, the "/V+" suffix in MAX6771TALD2+ confirms automotive qualification. This ensures reliability for under-hood and chassis-mounted applications subject to automotive stress profiles.

How does the dual-enable feature work on the MAX6771TALD2+?

The MAX6771TALD2+ uses ENABLE1 and ENABLE2 as independent active-high inputs: either can turn on the regulator. This allows one input (e.g., ENABLE1) to connect to the ignition switch for main power control, and the other (ENABLE2) to interface with a CAN or LIN transceiver for bus-initiated wake-up. Both inputs are internally pulled down (0.6µA), ensuring default-off safety. The MAX6771TALD2+ remains enabled as long as at least one input is high.

What thermal performance can be expected from the MAX6771TALD2+ in a real PCB layout?

With its 3mm × 3mm TDFN-EP package and exposed pad soldered to a 4-layer PCB ground plane, the MAX6771TALD2+ achieves θ_JA = 41°C/W. At 100mA load and 14V input, power dissipation is ~0.63W; this yields ~26°C rise above ambient, well within the +125°C operating limit. Derating begins above +70°C ambient at 24.4mW/°C, supporting continuous operation up to +125°C ambient when properly laid out.