Analog Devices Inc./Maxim Integrated MAX6771TATD1+T

Overview

MAX6771TATD1+T from Maxim Integrated is a dual-enable, automotive-grade micropower linear regulator with integrated supervisor and open-drain RESET output. It operates from 4V to 72V input, delivers 100mA output current at 5.0V (L option), features 31µA quiescent current, and includes fixed 3.125ms reset timeout (D1 suffix) - designed for ignition-controlled always-on modules in vehicle body electronics.

For engineers reviewing the MAX6771TATD1+T datasheet, MAX6771TATD1+T pinout, MAX6771TATD1+T application, or MAX6771TATD1+T equivalent, key selection criteria include dual-enable logic compatibility with CAN/LIN transceivers, -40°C to +125°C operation, AEC-Q100 qualification, and thermal protection under high-ambient automotive conditions.

Technical Context

The MAX6771TATD1+T implements dual active-high enable inputs (ENABLE1 and ENABLE2) to support independent control via ignition switch and bus transceiver signals - enabling coordinated power sequencing without external logic. Its supervisor circuit monitors the regulated 5.0V output and asserts an open-drain RESET signal when voltage falls below 4.625V (L threshold), holding it low for ≥3.125ms after recovery.

This device uses a thermally enhanced 6-pin TDFN-EP package (3mm × 3mm) with exposed pad tied to GND, achieving θ_JA = 42°C/W on multilayer PCBs. It integrates overtemperature shutdown (160°C trip, 20°C hysteresis) and short-circuit current limiting (150–250mA), ensuring robustness during load faults or thermal overload.

Key Specifications

Pinout & Package

Package: 6-pin TDFN-EP (3mm × 3mm, exposed pad), RoHS-compliant, thermally optimized for automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6772TATD1+T, MAX6771TATD1+T simplifies design by omitting HOLD logic while retaining dual-enable flexibility; versus TLV70750PDQNR, it enables direct connection to automotive battery rails without pre-regulation - critical for cost-sensitive body electronics.

Availability

MAX6771TATD1+T is available at Aetrix Electronics and suitable for automotive body control, telematics, ADAS camera ECUs, and electric power steering sensor interfaces requiring stable component supply across extended temperature and high-reliability automotive programs.

Supply support for MAX6771TATD1+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

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

The MAX6765–MAX6774B family was engineered specifically for automotive micropower regulation with integrated supervision - targeting always-on modules needing ultra-low IQ, wide VIN, and AEC-Q100 reliability.

FAQ

What is the function of ENABLE1 and ENABLE2 on the MAX6771TATD1+T?

ENABLE1 and ENABLE2 are independent active-high inputs that both must be asserted (≥1.4V) to turn on the MAX6771TATD1+T regulator. This dual-enable architecture allows coordinated control - for example, ENABLE1 driven by ignition switch and ENABLE2 by LIN/CAN transceiver activity - ensuring power is only applied when both system conditions are met. The MAX6771TATD1+T remains off if either input is low or floating (internally pulled down).

Does the MAX6771TATD1+T require an external capacitor on the TIMEOUT pin?

No. The MAX6771TATD1+T uses the D1 suffix, indicating a factory-programmed 3.125ms reset timeout period. The TIMEOUT pin is internally configured for this fixed value and does not require an external capacitor. Connecting TIMEOUT to OUT (as specified in the datasheet) selects the internal timeout; adding a capacitor would override the fixed setting and is unnecessary for MAX6771TATD1+T's intended use case.

Is the MAX6771TATD1+T AEC-Q100 qualified?

Yes, the MAX6771TATD1+T is AEC-Q100 qualified per Grade 0 (−40°C to +125°C junction temperature), including stress testing for high-temperature operating life, temperature cycling, and electrostatic discharge. This qualification is confirmed in the official Maxim Integrated datasheet ordering information table and applies specifically to the /V+ automotive-grade variant, which MAX6771TATD1+T is.

What is the maximum output current capability of the MAX6771TATD1+T?

The MAX6771TATD1+T guarantees 100mA continuous output current under all operating conditions within its specification limits. Actual deliverable current depends on thermal conditions: at +125°C ambient with 72V input, power dissipation limits may reduce usable current, but the device is rated for 100mA at +70°C ambient with proper PCB copper pour on the exposed pad. Short-circuit current is limited to 150–250mA for fault protection.

Can the MAX6771TATD1+T be used with adjustable output voltages?

No. The MAX6771TATD1+T is a fixed-output device with 5.0V (L option) and does not support adjustable output. Its SET pin is not present - only devices in the MAX6767–MAX6774B series with SET pin capability (e.g., MAX6773TATD1+T) allow adjustment from 1.8V to 11V using external resistors. The MAX6771TATD1+T has no SET pin and is strictly a 5V regulator with dual-enable and supervisor functions.