Analog Devices Inc./Maxim Integrated MAX6796TPYD4+

Overview

MAX6796TPYD4+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It operates from 5V to 72V input, delivers up to 300mA output current, features 68μA quiescent current, and provides a fixed 1.8V output with 87.5% reset threshold and 200ms reset timeout - ideal for engine control units under load-dump conditions.

For engineers reviewing the MAX6796TPYD4+ datasheet, MAX6796TPYD4+ pinout, MAX6796TPYD4+ application, or MAX6796TPYD4+ equivalent, key selection criteria include its AEC-Q100-qualified 5mm × 5mm TQFN package, dual-mode watchdog (280ms fixed or capacitor-adjustable), HOLD/ENABLE control logic for self-holding ignition circuits, and thermal protection up to +125°C junction temperature.

Technical Context

The MAX6796TPYD4+ implements a single LDO regulator with internal pFET pass element and precision bandgap reference, supporting 1.8V fixed output with ±1.5% initial accuracy over temperature. Its supervisory block integrates a comparator-based RESET generator with programmable timeout via CSRT pin and a windowed-capable watchdog timer (disabled in this variant per D4 suffix) that monitors WDI transitions.

It features reverse-battery protection via GATEP-driven external p-MOSFET, power-fail detection using PFI/PFO with 1.231V internal threshold, and robust fault handling including thermal shutdown (+165°C), short-circuit current limiting (400–480mA), and output overvoltage protection (105–110% VOUT).

Key Specifications

Pinout & Package

MAX6796TPYD4+ uses a 20-pin thermally enhanced TQFN-EP (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND for low-thermal-resistance PCB mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage supervisory regulator applications.

Compared with MAX6796TPYD4+, MAX6795TPYD4+ offers identical functionality without AEC-Q100 validation, while TLV70718PDPWR sacrifices high-voltage resilience, supervision features, and thermal capability for smaller size and lower cost in benign environments.

Availability

MAX6796TPYD4+ is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS camera modules, and telematics systems requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for MAX6796TPYD4+ 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 MAX6791–MAX6796 family was engineered specifically for automotive power-supply supervision - integrating high-input-voltage regulation, ultra-low IQ, and fault-aware control logic into a single AEC-Q100-qualified package.

FAQ

What output voltage does the MAX6796TPYD4+ provide?

The MAX6796TPYD4+ provides a fixed 1.8V output voltage with ±1.5% initial accuracy over temperature. This value is factory-trimmed and requires no external feedback components - SET pin is internally connected to GND. The device maintains regulation across its full 5V to 72V input range and 0–300mA load, with dropout voltage as low as 120mV at light loads.

How is the reset timeout period configured on the MAX6796TPYD4+?

The MAX6796TPYD4+ uses the D4 suffix to indicate a factory-configured 200ms reset timeout period. This is implemented by connecting the CSRT pin internally to the OUT pin, selecting the D4 option from the fixed timeout table (35μs, 3.125ms, 12.5ms, 50ms, or 200ms). No external capacitor is required - the timing is fully internal and temperature-compensated across -40°C to +125°C.

Is the watchdog function enabled on the MAX6796TPYD4+?

No - the MAX6796TPYD4+ has watchdog functionality disabled. The D4 suffix denotes fixed 200ms reset timeout and implies WD-DIS is asserted (internally tied high), disabling the watchdog timer. WDI remains functional but ignored; no watchdog timeout behavior occurs. This configuration reduces system complexity where deterministic reset-only supervision suffices.

What is the purpose of the HOLD pin on the MAX6796TPYD4+?

The HOLD pin on the MAX6796TPYD4+ enables self-holding circuitry without external components. When driven low after ENABLE activation, HOLD forces the regulator to remain ON even if ENABLE returns low - essential for ignition-switched automotive systems. Releasing HOLD (pulling high or leaving floating) shuts down the output. HOLD is internally pulled up to OUT with 2μA, simplifying interface design.

Does the MAX6796TPYD4+ support reverse-battery protection?

Yes - the MAX6796TPYD4+ integrates reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When battery polarity is reversed, GATEP holds the FET off, blocking current flow. This eliminates the 0.3–0.7V forward drop and power loss of traditional series diodes, improving efficiency and thermal performance in automotive applications.