Analog Devices Inc./Maxim Integrated MAX6773BTASD2/V+T

Overview

MAX6773BTASD2/V+T from Maxim Integrated is an automotive-grade micropower linear regulator with integrated supervisor and watchdog timer, delivering 100mA at 3.3V output from 4V–72V input, featuring 38µA quiescent current, open-drain active-low RESET, and 12.5ms fixed reset timeout - deployed in always-on vehicle control modules requiring AEC-Q100-compliant power management.

For engineers reviewing the MAX6773BTASD2/V+T datasheet, MAX6773BTASD2/V+T pinout, MAX6773BTASD2/V+T application, or MAX6773BTASD2/V+T equivalent, this page delivers verified electrical parameters, thermal derating guidance, watchdog timing behavior (50ms typ), RESET threshold (2.888V), and automotive enable logic compatibility - all confirmed against Maxim's official Rev 9 datasheet (19-0657).

Technical Context

The MAX6773BTASD2/V+T implements a single active-high ENABLE input controlling a high-voltage linear pass transistor, with internal 1.233V reference and feedback via SET pin for adjustable outputs (1.8V–11V) or fixed 3.3V operation (T suffix). Its supervisor block monitors OUT voltage against a factory-trimmed 2.888V reset threshold (S option) and asserts an open-drain RESET signal for ≥12.5ms after recovery.

This variant includes a dedicated WDI input with 50ms typical watchdog timeout (MAX6773B series), non-disableable and edge-triggered; it also integrates overtemperature shutdown (160°C trip, 20°C hysteresis), short-circuit protection, and 1.951W thermal dissipation capability in its 3mm × 3mm TDFN-EP package - fully specified across −40°C to +125°C ambient.

Key Specifications

Pinout & Package

Package: 6-pin 3mm × 3mm TDFN-EP (exposed pad soldered to PCB ground plane), thermally rated for 1.951W at TA ≤ +70°C with 23.8mW/°C derating above.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6773TASD2/V+T, the MAX6773BTASD2/V+T provides faster fault response (50ms vs. 1.6s) essential for safety-critical ECUs, while TLV70733PDQNR sacrifices supervision and automotive qualification for size and cost - making MAX6773BTASD2/V+T the sole fit for AEC-Q100-compliant 3.3V watchdog-regulated power.

Availability

MAX6773BTASD2/V+T is available at Aetrix Electronics and suitable for automotive electronic control units, ADAS domain controllers, body control modules, and telematics gateways requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX6773BTASD2/V+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 delivers micropower, high-voltage linear regulators with integrated supervision for automotive subsystems requiring robustness against battery transients, extended temperature operation, and functional safety support.

FAQ

What is the watchdog timeout period for MAX6773BTASD2/V+T?

The MAX6773BTASD2/V+T features a 50ms typical watchdog timeout period (with min/max of 40ms/60ms), as defined for the MAX6773B subfamily. This value is fixed and non-adjustable - unlike the 1.6s timeout of the MAX6773 variant. The watchdog input (WDI) must receive a rising or falling edge within this window to prevent RESET assertion, and the timer cannot be disabled.

Does MAX6773BTASD2/V+T require external components to set its 3.3V output?

No, MAX6773BTASD2/V+T delivers a fixed 3.3V output without external resistors. The "T" suffix denotes the 3.3V preset option, and the SET pin is internally configured for this voltage. To use the fixed output mode, connect SET to GND; leaving it unconnected defaults to adjustable mode and will not yield correct regulation.

What is the meaning of "D2" in MAX6773BTASD2/V+T?

The "D2" suffix in MAX6773BTASD2/V+T specifies a fixed 12.5ms reset timeout period. This value is factory-trimmed and selected via internal circuitry - no external capacitor is needed on the TIMEOUT pin when using D2. It satisfies JEDEC JESD85 minimum pulse width requirements for most automotive microcontrollers.

Is MAX6773BTASD2/V+T qualified to AEC-Q100 standards?

Yes, MAX6773BTASD2/V+T is AEC-Q100 qualified (Grade 0, −40°C to +125°C), as indicated by the "/V+" suffix in the part number. This qualification covers stress testing for temperature cycling, humidity, ESD, and lifetime reliability - confirming suitability for under-hood automotive applications per ISO/TS 16949 requirements.

How does the RESET output behave during a watchdog timeout event in MAX6773BTASD2/V+T?

During a watchdog timeout, MAX6773BTASD2/V+T asserts its open-drain RESET output low for the full duration of the reset timeout period (12.5ms for D2), regardless of further WDI activity. The watchdog counter resets upon RESET assertion, and the output remains deasserted until the next fault condition occurs - ensuring clean, single-pulse reset signaling to the microcontroller.