Analog Devices Inc./Maxim Integrated MAX6796TPLD3+

Overview

The MAX6796TPLD3+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection) for automotive systems. It operates from 5V to 72V input, delivers up to 300mA output current, features 68μA quiescent current, and provides a preset 5V output with 87.5% reset threshold and 50ms fixed reset timeout - ideal for engine control units and body electronics under load-dump conditions.

For engineers reviewing the MAX6796TPLD3+ datasheet, MAX6796TPLD3+ pinout, MAX6796TPLD3+ application, or MAX6796TPLD3+ equivalent, this page delivers verified electrical parameters, thermal performance at +125°C, AEC-Q100-relevant supervision timing, and precise pin-level interface guidance for automotive-grade power sequencing and fault recovery.

Technical Context

The MAX6796TPLD3+ integrates a single LDO regulator with internal pFET gate drive (GATEP) for reverse-battery protection, a push-pull or open-drain RESET output with fixed 87.5% threshold relative to VOUT, and a watchdog timer with fixed 280ms timeout (CSWT tied to OUT). Its HOLD input enables self-holding behavior without external latching components, supporting ignition-controlled power-on sequences.

It implements dual-mode supervision: RESET asserts on VOUT drop below threshold or watchdog timeout expiry, then holds low for 50ms (CSRT = D3), while PFI comparator monitors external voltage dividers for early power-fail warnings (VPFI = 1.231V ±0.5%). All protections - thermal shutdown (+165°C), short-circuit current limit (400–480mA), and output overvoltage clamp (1.05×VOUT) - are fully specified across −40°C to +125°C.

Key Specifications

Pinout & Package

MAX6796TPLD3+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package (exposed pad connected to GND), rated for 2.7W dissipation at +70°C ambient. Pin count and layout match all MAX6791–MAX6796 family members.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPLD3+, the MAX6796TPLD3+ offers identical electrical performance and pin compatibility but lacks explicit /V automotive qualification marking - making it suitable for non-certified prototypes or cost-sensitive Tier 2 designs. Versus TPS7B8750QKVURQ1, MAX6796TPLD3+ integrates supervision functions that would otherwise require 3–4 discrete ICs, reducing board area and validation effort.

Availability

MAX6796TPLD3+ is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and telematics systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6796TPLD3+ 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 high-reliability, low-power, and high-voltage solutions.

The MAX6791–MAX6796 family was engineered specifically for automotive power management - integrating high-input-voltage regulation, robust supervision, and reverse-battery protection into a single 20-pin TQFN to replace multi-chip discrete supervisory solutions.

FAQ

What output voltage does the MAX6796TPLD3+ provide?

The MAX6796TPLD3+ provides a fixed 5V output voltage. This is confirmed by the "L" designation in its ordering code (MAX6796TPLD3+), where "L" corresponds to 5V preset output per Maxim's selector guide. Output accuracy is ±2.5% over temperature and line/load conditions, with typical regulation of 4.945V to 5.078V at 150mA load.

Does the MAX6796TPLD3+ include watchdog functionality?

Yes, the MAX6796TPLD3+ includes a configurable watchdog timer with a fixed 280ms timeout period (minimum), enabled by tying CSWT to OUT. The watchdog monitors WDI transitions and asserts RESET if no valid edge occurs within the timeout window. It can be disabled using WD-DIS or WDS0/WDS1 pins, though MAX6796 variants use WD-DIS rather than windowed watchdog logic.

What is the meaning of 'D3' in MAX6796TPLD3+?

The "D3" in MAX6796TPLD3+ denotes the reset timeout period option: D3 specifies a fixed 50ms reset timeout (tRP), as defined in Table 2 of the datasheet. This value is set internally when CSRT is connected to OUT; no external capacitor is required. D3 is selected for applications needing guaranteed minimum reset pulse width after power recovery.

Is the MAX6796TPLD3+ AEC-Q100 qualified?

The MAX6796TPLD3+ is not explicitly marked with /V suffix (e.g., MAX6796TPLD3+/V), and its ordering table lists /V qualification only for MAX6795TP_D_/V+ and MAX6795TPLD2/V+. While MAX6796TPLD3+ shares identical design, test flow, and temperature rating (−40°C to +125°C), formal AEC-Q100 certification documentation applies to /V-suffixed variants - confirm qualification status with Analog Devices for safety-critical deployments.

Can the MAX6796TPLD3+ drive an external p-channel MOSFET for reverse-battery protection?

Yes, the MAX6796TPLD3+ includes a dedicated GATEP pin that sources up to 12V (typ) at 10mA to drive the gate of an external p-channel MOSFET. This enables efficient reverse-polarity protection without series diode losses. The internal IN-to-GATEP clamp (13.8V–18.8V) and drive capability ensure reliable turn-on of common automotive pFETs like the SQJ852EP.