Analog Devices Inc./Maxim Integrated MAX6766TTLD2+T

Overview

MAX6766TTLD2+T from Maxim Integrated is a high-voltage, micropower linear regulator with integrated supervisor functionality, delivering up to 100mA at a fixed 5.0V output from 4V–72V input. It features an active-low open-drain RESET output with 12.5ms fixed timeout (D2 suffix), 31µA quiescent current, and -40°C to +125°C operation - designed for always-on automotive modules requiring reliable power sequencing and brownout protection.

For engineers reviewing the MAX6766TTLD2+T datasheet, MAX6766TTLD2+T pinout, MAX6766TTLD2+T application, or MAX6766TTLD2+T equivalent, key selection criteria include its 5V fixed output, 12.5ms reset timeout, TDFN-6 package thermal performance (θJA = 42°C/W on multilayer board), AEC-Q100 qualification, and compatibility with automotive ignition-controlled enable schemes.

Technical Context

The MAX6766TTLD2+T implements a single active-high ENABLE input (Pin 3) to control regulator startup and shutdown, with internal 0.6µA pulldown ensuring default-off behavior. Its RESET output (Pin 4) asserts low when OUT falls below 4.625V (L-suffix threshold) and remains asserted for ≥12.5ms after recovery - meeting critical microcontroller reset timing requirements in automotive power-up sequences.

Thermal protection activates at +160°C (typ) with 20°C hysteresis, and overcurrent limiting sustains 150–250mA during short-circuit events. The device uses a standard 3mm × 3mm TDFN-6 package with exposed pad (EP), supporting 1.951W continuous dissipation under high ambient conditions - validated for sustained operation at 72V input, 100mA load, and +125°C ambient.

Key Specifications

Pinout & Package

MAX6766TTLD2+T is housed in a thermally optimized 3mm × 3mm TDFN-6 package with exposed pad (EP) connected internally to GND. The EP must be soldered to a PCB ground plane to achieve θJA = 42°C/W (multilayer board) and sustain full 100mA output at high ambient temperatures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6765TTLD2+T, the MAX6766TTLD2+T offers identical regulation and reset specs but belongs to the same ENABLE-only subgroup - whereas TLV70750PDQNR lacks high-voltage capability and integrated supervision entirely, making it unsuitable for direct automotive replacement without redesign.

Availability

MAX6766TTLD2+T is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera ECUs, engine control units, and telematics gateways requiring stable component supply with AEC-Q100 assurance and long-lifecycle support.

Supply support for MAX6766TTLD2+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 and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing high reliability and extreme environmental robustness.

The MAX6765–MAX6774B product line delivers automotive-grade micropower linear regulators with integrated supervision - engineered specifically for always-on electronic control units where ultra-low quiescent current, wide input range, and guaranteed reset timing are mandatory.

FAQ

What is the reset threshold voltage for MAX6766TTLD2+T?

The MAX6766TTLD2+T has an L-suffix reset threshold of 4.625V (min) / 4.750V (max), meaning the RESET output asserts low when the regulated 5V output falls below this range. This threshold is factory-trimmed and guaranteed over -40°C to +125°C, ensuring reliable microcontroller reset during brownout conditions without external resistor networks.

Does MAX6766TTLD2+T support adjustable output voltage?

No, MAX6766TTLD2+T provides a fixed 5.0V output only. It belongs to the MAX6765/MAX6766 subgroup with preset outputs - unlike MAX6767–MAX6774B variants that feature a SET pin for adjustable operation from 1.8V to 11V. For adjustable output, select MAX6767TTLD2+T or equivalent with SET functionality.

What is the thermal performance of MAX6766TTLD2+T in a real PCB layout?

When mounted on a 4-layer PCB with the exposed pad (EP) soldered to a solid ground plane, MAX6766TTLD2+T achieves θJA = 42°C/W. At 100mA load and 14V input, power dissipation is ~0.62W, resulting in ~26°C junction-to-ambient rise - well within the +125°C maximum ambient rating and enabling full-load operation without forced air cooling.

Is MAX6766TTLD2+T qualified for automotive use?

Yes, MAX6766TTLD2+T is AEC-Q100 qualified (Grade 1, -40°C to +125°C) and manufactured in an automotive-certified flow. It undergoes rigorous stress testing including temperature cycling, HTOL, and ESD - making it suitable for under-hood and cabin-mounted ECUs where reliability and longevity are critical.

How does the ENABLE pin function on MAX6766TTLD2+T?

The ENABLE pin (Pin 3) is an active-high input with internal 0.6µA pulldown to GND, ensuring the regulator remains off until explicitly enabled. Driving ENABLE high (≥1.4V) turns on the 5V output; pulling it low (≤0.4V) shuts down the regulator, reducing supply current to 3.3µA (typ). No external pullup resistor is required due to the internal pulldown.