Analog Devices Inc./Maxim Integrated MAX6793TPZD0+

Overview

MAX6793TPZD0+ 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 68μA quiescent current, fixed 5V/3.3V output options (this variant: 3.3V), and active-low open-drain RESET with 87.5% reset threshold. It supports load-dump survival in vehicle battery systems.

For engineers reviewing the MAX6793TPZD0+ datasheet, MAX6793TPZD0+ pinout, MAX6793TPZD0+ application, or MAX6793TPZD0+ equivalent, key selection criteria include dual 150mA output capability, watchdog timeout configurability (280ms min), HOLD-enabled self-holding circuit operation, thermal protection up to +125°C, and AEC-Q100-compliant performance under automotive transients.

Technical Context

The MAX6793TPZD0+ implements two independent LDO regulators: OUT1 (adjustable or preset 3.3V) and fixed 5V OUT2, each with dedicated enable control (ENABLE1/ENABLE2). Its supervisory block integrates a windowed watchdog timer (via WDS0/WDS1), capacitor-adjustable reset timeout (CSRT), and power-fail comparator (PFI/PFO).

It uses internal current-limited pFET gate drive (GATEP) for reverse-battery protection and includes thermal shutdown (+165°C), short-circuit current limiting (240mA), and output overvoltage protection (1.05×VOUT). The HOLD input enables latch-up behavior without external components when driven low after initial enable.

Key Specifications

Pinout & Package

MAX6793TPZD0+ is housed in a thermally enhanced 20-pin TQFN-EP package (5mm × 5mm, 0.8mm height) with exposed pad (EP) connected internally to GND for optimal heat dissipation (2.7W continuous).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6794TPZD0+, MAX6793TPZD0+ omits windowed watchdog inputs but retains full dual-regulator functionality and reset supervision - making it ideal for cost-optimized automotive modules requiring basic watchdog disable capability rather than tight timing windows.

Availability

MAX6793TPZD0+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera ECUs, and engine control auxiliary rails requiring stable component supply, AEC-Q100-aligned reliability, and high-input-voltage resilience.

Supply support for MAX6793TPZD0+ 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-voltage LDO regulation, reset generation, watchdog monitoring, and reverse-battery protection in a single compact package.

FAQ

What output voltage does the MAX6793TPZD0+ provide?

The MAX6793TPZD0+ provides a preset 3.3V output on OUT1 and a fixed 5V output on OUT2. The "Z" in the part number denotes the 3.3V option for OUT1, confirmed by the datasheet's ordering guide and electrical characteristics tables showing T/S (3.3V) output voltage tolerances. This is factory-trimmed and requires no external feedback components when used in preset mode.

Does the MAX6793TPZD0+ support adjustable output voltage?

Yes, the MAX6793TPZD0+ supports adjustable output voltage on OUT1 from 1.8V to 11V using an external resistor divider connected between OUT1, SET1, and GND. When SET1 is grounded, it defaults to the preset 3.3V output. The device maintains regulation accuracy and dropout performance across the full adjustment range, as verified in the Electrical Characteristics table.

What is the function of the HOLD pin on the MAX6793TPZD0+?

The HOLD pin on the MAX6793TPZD0+ is an active-low latch control that keeps OUT1 enabled even after ENABLE1 is deasserted. Once OUT1 is powered and HOLD is pulled low, the regulator remains on until HOLD is released (high or floating). This enables self-holding circuits - such as ignition-triggered power domains - without external components, a key feature for automotive start-stop and accessory power management.

How is the reset timeout period configured on the MAX6793TPZD0+?

The reset timeout period on the MAX6793TPZD0+ is set to 50ms by the "D3" suffix in the part number, implemented by connecting CSRT to OUT1. This selects the internally fixed 50ms timeout (per Table 2 in the datasheet). Alternatively, a capacitor from CSRT to GND allows user-adjustable timeout from ~35μs to 260ms, with timing determined by capacitor value and internal ramp current (1000nA typical).

Is the MAX6793TPZD0+ qualified for automotive use?

The MAX6793TPZD0+ is not itself AEC-Q100 qualified, but it belongs to the MAX6791–MAX6796 family whose automotive-grade variants (e.g., MAX6793TPZD0/V+) are AEC-Q100 qualified. This lead-free, tape-and-reel packaged version shares identical die, package construction, and operating specifications (-40°C to +125°C), and is commonly used in automotive designs where qualification is managed at the system level or via equivalent testing.