Analog Devices Inc./Maxim Integrated MAX6793TPLD2+T

Overview

MAX6793TPLD2+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 150mA per output across a 5V–72V input range, features a fixed 5V OUT1 and adjustable OUT2 (1.8V–11V), and includes push-pull RESET, watchdog timer, HOLD/ENABLE control, and thermal/short-circuit protection - deployed in engine control units and ADAS domain controllers.

For engineers reviewing the MAX6793TPLD2+T datasheet, MAX6793TPLD2+T pinout, MAX6793TPLD2+T application, or MAX6793TPLD2+T equivalent, key selection criteria include its AEC-Q100-compliant -40°C to +125°C operation, 68μA quiescent current, dual enable inputs (ENABLE1/ENABLE2), 12.5ms fixed reset timeout (D2), and 5mm × 5mm TQFN-20EP package with exposed pad thermal enhancement.

Technical Context

The MAX6793TPLD2+T implements two independent LDO regulators: OUT1 is fixed at 5V (±2.5% over temperature), while OUT2 is adjustable via external SET1 resistive divider (1.8V–11V). Its supervisory block integrates a windowed watchdog timer (disabled by default), active-low RESET with 92.5% threshold tracking OUT1, and capacitor-adjustable or factory-fixed reset timeout (D2 = 12.5ms).

It supports reverse-battery protection via GATEP-driven pFET, includes PFI/PFO for programmable undervoltage detection (1.231V reference), and uses internal 2µA pull-up on HOLD to enable self-holding circuitry without external components - all operating under strict AEC-Q100 Grade 0 stress conditions.

Key Specifications

Pinout & Package

MAX6793TPLD2+T is housed in a thermally enhanced 20-pin TQFN-EP (5mm × 5mm) with exposed pad (EP) connected internally to GND. The package supports continuous operation at high ambient temperatures and high load currents due to low junction-to-board thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output automotive LDO applications.

Compared with MAX6794TPLD2+T, MAX6793TPLD2+T omits windowed watchdog logic - simplifying timing validation - while retaining identical dual-regulator performance, RESET behavior, and thermal specs. Against TPS7B8750QKVURQ1, it trades higher current and lower dropout for dual outputs, watchdog, and power-fail monitoring essential in complex automotive domains.

Availability

MAX6793TPLD2+T is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for MAX6793TPLD2+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 with emphasis on reliability and AEC-Q100 compliance.

The MAX6791–MAX6796 product line targets high-voltage automotive power management, integrating micropower regulation, reset supervision, watchdog monitoring, and reverse-battery protection into compact thermally robust packages.

FAQ

What output voltage options does the MAX6793TPLD2+T support?

The MAX6793TPLD2+T provides a fixed 5V output on OUT1 and an adjustable output on OUT2 ranging from 1.8V to 11V, configured using an external resistive divider connected to SET1. It does not support other preset voltages (e.g., 3.3V or 2.5V) on OUT1 - those are available only in other variants like MAX6791/MAX6792. The D2 suffix confirms the 12.5ms reset timeout, not output voltage selection.

Is the MAX6793TPLD2+T AEC-Q100 qualified?

Yes, the MAX6793TPLD2+T is AEC-Q100 qualified (Grade 0, -40°C to +125°C), as confirmed by Maxim's official documentation and ordering information indicating /V+ suffix compatibility. This qualification covers stress testing for temperature cycling, humidity, ESD, and mechanical shock - making it suitable for under-hood automotive deployment where MAX6793TPLD2+T operates continuously within its full thermal envelope.

How does the HOLD function work on the MAX6793TPLD2+T?

The HOLD input on MAX6793TPLD2+T is an active-low signal that enables self-holding operation: once ENABLE1 is asserted and OUT1 begins regulating, pulling HOLD low latches the regulator ON - maintaining output even if ENABLE1 is subsequently removed. Releasing HOLD (to high or open) shuts down OUT1/OUT2. HOLD is internally pulled up to OUT1 with 2µA, so leaving it unconnected defaults to standard enable behavior.

Can the watchdog timer be disabled on the MAX6793TPLD2+T?

Yes, the watchdog timer on MAX6793TPLD2+T can be disabled using the WD-DIS input (Pin 9): driving WD-DIS low disables the watchdog function entirely, preventing RESET assertion due to WDI timeout. Unlike MAX6791/MAX6792, MAX6793TPLD2+T does not implement windowed watchdog logic - its watchdog operates in standard single-timeout mode (280ms min, adjustable via CSWT), and WD-DIS provides clean functional disable without configuration overhead.

What is the purpose of the GATEP pin on the MAX6793TPLD2+T?

The GATEP pin on MAX6793TPLD2+T drives the gate of an external p-channel MOSFET to provide reverse-battery protection. When battery polarity is inverted, GATEP holds the pFET off, blocking current flow and protecting downstream circuitry - eliminating the need for lossy series diodes. GATEP delivers ~10V drive at VIN = 20V and clamps at ~16.3V, enabling robust MOSFET control across the full 5V–72V input range of MAX6793TPLD2+T.