Analog Devices Inc./Maxim Integrated MAX6796TPLD4+

Overview

MAX6796TPLD4+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 300mA at 5V (L option), operates from 5V to 72V input, consumes only 68μA quiescent current, and features a push-pull RESET output with 200ms fixed timeout (D4). It is used in engine control units (ECUs) to power microcontrollers under harsh battery transients.

For engineers reviewing the MAX6796TPLD4+ datasheet, MAX6796TPLD4+ pinout, MAX6796TPLD4+ application, or MAX6796TPLD4+ equivalent, key selection criteria include its AEC-Q100-qualified 5mm × 5mm TQFN package, -40°C to +125°C operation, 420mV typical dropout at 100mA, adjustable or preset output (1.8V–11V), and dual-mode watchdog with disable capability.

Technical Context

The MAX6796TPLD4+ implements a single high-side pFET linear regulator with thermal and short-circuit protection, paired with a precision reset supervisor monitoring OUT voltage against a 92.5% threshold (for L-option 5V output → 4.625V nominal). Its RESET output asserts low on undervoltage or watchdog timeout and holds low for 200ms after recovery.

It integrates a programmable watchdog timer with fixed 280ms timeout (CSWT = OUT), disable via WD-DIS pin, and supports self-holding operation via HOLD input - enabling ignition-controlled latching without external circuitry. The device uses an internal 1.231V reference for PFI comparator and SET feedback.

Key Specifications

Pinout & Package

MAX6796TPLD4+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package (exposed pad connected to GND), rated for 2.7W power dissipation and optimized for high-temperature automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPLD4+, the MAX6796TPLD4+ offers identical 5V output and D4 reset timing but belongs to the single-output family optimized for higher current (300mA vs. 150mA per rail in dual versions); versus TPS7B8750QKVURQ1, it provides superior input voltage range, integrated reverse-battery drive, and hardware latching - critical for robust under-hood deployment.

Availability

MAX6796TPLD4+ is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX6796TPLD4+ 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 automotive, industrial, and communications markets.

The MAX6791–MAX6796 product line targets automotive power-supply supervision, delivering high-input-voltage regulation with integrated reset, watchdog, power-fail detection, and reverse-battery protection in a single AEC-Q100-qualified package.

FAQ

What output voltage does MAX6796TPLD4+ deliver?

The MAX6796TPLD4+ delivers a fixed 5V output (L option), with ±2.5% accuracy over temperature and load. This is confirmed by the "L" in the part number per Maxim's ordering guide, and electrical characteristics show VOUT = 4.850V to 5.150V at 300mA and VIN = 8V. The device also supports adjustable outputs from 1.8V to 11V when SET is configured with an external resistor divider.

Does MAX6796TPLD4+ support reverse-battery protection?

Yes, MAX6796TPLD4+ integrates a dedicated GATEP pin that drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When reverse polarity is applied, the internal circuitry disables the MOSFET, blocking current flow. This eliminates the need for a series Schottky diode and its associated 0.3–0.7V forward drop and power loss - a key advantage in high-current automotive applications.

What is the function of the HOLD pin on MAX6796TPLD4+?

The HOLD pin on MAX6796TPLD4+ enables hardware-based latching: when driven low after initial enable, it forces the regulator to remain ON even if ENABLE is subsequently pulled low. Releasing HOLD (to high or floating) shuts down the output. This allows ignition-switched circuits to maintain power without external components - a core feature for automotive body and chassis modules requiring self-hold behavior.

Is MAX6796TPLD4+ qualified for automotive use?

Yes, MAX6796TPLD4+ is AEC-Q100 qualified (Grade 0: -40°C to +125°C), as explicitly stated in the datasheet for related variants (e.g., MAX6795TPLD2/V+). Its 5mm × 5mm TQFN package, 72V input rating, integrated protections (thermal, short-circuit, overvoltage), and guaranteed operation across the full automotive temperature range confirm its suitability for under-hood and safety-critical vehicle systems.

How is the 200ms reset timeout implemented in MAX6796TPLD4+?

The 200ms reset timeout in MAX6796TPLD4+ is a factory-trimmed, internally fixed value (D4 option), activated when CSRT is connected to OUT. It defines the minimum duration RESET remains low after OUT recovers above its 92.5% threshold (4.625V for 5V output). This eliminates external timing components and ensures consistent, production-tested reset hold time - critical for reliable MCU initialization after battery transients.