Analog Devices Inc./Maxim Integrated MAX6772TASD2+T

Overview

MAX6772TASD2+T from Maxim Integrated is a dual-enable, automotive-grade micropower linear regulator with integrated supervisor and watchdog timer. It operates from 4V to 72V input, delivers 100mA output at fixed 3.3V, features open-drain active-low RESET with 12.5ms timeout (D2), and supports ignition- or bus-controlled power sequencing in always-on vehicle modules.

For engineers reviewing the MAX6772TASD2+T datasheet, MAX6772TASD2+T pinout, MAX6772TASD2+T application, or MAX6772TASD2+T equivalent, key selection criteria include dual-enable logic compatibility, AEC-Q100 qualification, 31µA quiescent current, 620mV dropout at 100mA, and thermal shutdown at +160°C - all critical for automotive body control, telematics, and infotainment power rails.

Technical Context

The MAX6772TASD2+T implements dual active-high enable inputs (ENABLE1 and ENABLE2) to support independent control via ignition switch and CAN/LIN transceiver signals, enabling robust power-on sequencing without external logic. Its supervisor circuit monitors the regulated 3.3V output and asserts an open-drain RESET when voltage falls below 2.888V (S threshold), holding low for ≥12.5ms after recovery.

This device integrates a 50ms watchdog timer (MAX6772B variant), but MAX6772TASD2+T does not include WDI functionality - confirmed by pinout (no WDI pin) and functional diagram exclusions. It uses TIMEOUT-to-GND capacitor adjustment only for reset timeout; output voltage is fixed at 3.3V and SET is internally grounded.

Key Specifications

Pinout & Package

MAX6772TASD2+T is housed in a thermally enhanced 6-pin TDFN-EP (3mm × 3mm, package code T633+2), with exposed pad (EP) soldered to PCB ground plane for θ_JA = 42°C/W (multi-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6771TASD2+T and TLV73333PDBVR, MAX6772TASD2+T uniquely combines AEC-Q100 qualification, dual-enable sequencing, and 72V input tolerance - making it the only viable choice for production automotive ECUs requiring functional safety compliance and robust power management.

Availability

MAX6772TASD2+T is available at Aetrix Electronics and suitable for automotive body control, telematics, and infotainment systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for MAX6772TASD2+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, automotive, and communications applications.

The MAX6765–MAX6774B family was engineered specifically for automotive micropower regulation with integrated supervision - targeting always-on modules that must meet ISO 16750 and AEC-Q100 requirements while minimizing quiescent current.

FAQ

What is the function of the TIMEOUT pin on the MAX6772TASD2+T?

The TIMEOUT pin on the MAX6772TASD2+T sets the minimum duration RESET remains asserted after the 3.3V output recovers from a brownout. When connected directly to OUT, it configures a fixed 12.5ms timeout (D2 suffix). Leaving it floating or connecting a capacitor to GND adjusts the timeout per the datasheet's capacitor-vs.-time curve - enabling precise alignment with µP reset timing requirements.

Does the MAX6772TASD2+T include a watchdog timer?

No, the MAX6772TASD2+T does not include a watchdog timer. The "B" suffix in MAX6772B denotes the 50ms watchdog variant, but MAX6772TASD2+T belongs to the base MAX6772 series without WDI functionality. Its pinout omits WDI, and the functional diagram shows no watchdog block - confirming it provides only voltage supervision and dual-enable control.

What is the maximum ambient temperature at which the MAX6772TASD2+T can deliver 100mA continuously?

The MAX6772TASD2+T can deliver 100mA continuously up to +105°C ambient when mounted on a multi-layer PCB with the EP properly soldered to a thermal pad. This is derived from its 1.9W power dissipation limit, 42°C/W θ_JA, and 160°C thermal shutdown threshold - allowing ~55°C rise above ambient before shutdown, consistent with its −40°C to +125°C operating range specification.

How does the dual-enable feature of the MAX6772TASD2+T improve automotive system reliability?

The dual-enable feature of the MAX6772TASD2+T improves automotive system reliability by decoupling power activation from two independent sources: ENABLE1 responds to ignition status, while ENABLE2 responds to bus activity (e.g., CAN wake frame). This prevents unintended shutdown during bus communication bursts and ensures power remains active during critical diagnostics - eliminating single-point failure modes in ECU power sequencing.

Is the MAX6772TASD2+T pin-compatible with other devices in the MAX6765–MAX6774B family?

Yes, the MAX6772TASD2+T shares the same 6-pin TDFN-EP package and pinout as MAX6771TASD2+T and MAX6765TTSD2+T, but differs functionally: MAX6771 has identical dual-enable logic without AEC-Q100, while MAX6765 uses single ENABLE and lacks HOLD/WDI pins. Pin compatibility enables drop-in replacement for dual-enable variants, but output voltage and qualification must be verified per part number.