Analog Devices Inc./Maxim Integrated MAX6796TPYD3+

Overview

MAX6796TPYD3+ 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 (±2.5% over -40°C to +125°C), operates from 5V to 72V input, consumes only 68μA quiescent current, and features active-low RESET with 50ms timeout and watchdog monitoring. It is used in engine control units (ECUs) to power microcontrollers during cold-crank and load-dump conditions.

For engineers reviewing the MAX6796TPYD3+ datasheet, MAX6796TPYD3+ pinout, MAX6796TPYD3+ application, or MAX6796TPYD3+ equivalent, key selection criteria include its 72V input tolerance, AEC-Q100-relevant thermal robustness (165°C shutdown), adjustable reset threshold (92.5% of VOUT), capacitor-adjustable watchdog timeout, and HOLD-enabled self-holding circuit for ignition-switched operation.

Technical Context

The MAX6796TPYD3+ implements a single high-side pFET-based LDO architecture with internal current limiting, thermal shutdown (165°C, 20°C hysteresis), and output overvoltage protection (105–110% of VOUT). Its RESET logic monitors OUT voltage with fixed 92.5% threshold and 50ms timeout (D3 option), while the watchdog accepts WDI transitions and supports fixed 280ms timeout or capacitor-adjustable timing via CSWT.

It integrates a precision 1.231V reference for PFI comparator and SET/SET1 feedback, enabling accurate power-fail detection and adjustable output (1.8V–11V). The HOLD input provides latch functionality without external components, and ENABLE is internally pulled down (0.5μA sink), supporting direct connection to automotive wake-up signals.

Key Specifications

Pinout & Package

MAX6796TPYD3+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP = GND). The package dissipates up to 2.7W and supports continuous operation at high ambient temperature and full load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPYD3+, the MAX6796TPYD3+ offers identical performance but is designated for newer production lots with updated internal screening; versus TLE42764G, it provides 80% higher input voltage margin, 20% more output current, and programmable supervision essential for ASIL-compliant systems.

Availability

MAX6796TPYD3+ is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and electric power steering sensor interfaces requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX6796TPYD3+ 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 compact thermally enhanced packages.

FAQ

What output voltage does the MAX6796TPYD3+ deliver?

The MAX6796TPYD3+ is configured as a 5V preset-output regulator. Its nominal output is 5.0V with ±2.5% tolerance over -40°C to +125°C and full load (300mA). The device also supports adjustable output from 1.8V to 11V via external resistor divider on the SET pin-however, the MAX6796TPYD3+ variant is factory-set to 5V and does not require external components for that configuration.

Does the MAX6796TPYD3+ include reverse-battery protection?

Yes, the MAX6796TPYD3+ integrates reverse-battery protection circuitry via its GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the need for a series Schottky diode, reducing forward voltage drop and power loss. When reverse polarity is applied, the internal controller disables the pFET, blocking current flow and protecting downstream circuitry without external components beyond the MOSFET itself.

How is the reset timeout period set on the MAX6796TPYD3+?

The MAX6796TPYD3+ uses the D3 suffix to indicate a factory-configured 50ms reset timeout period. This is implemented by connecting the CSRT pin internally to the OUT pin, selecting the fixed 50ms option from the standard timeout table (D0–D4). No external capacitor is required-CSRT should be left unconnected or tied to OUT per layout guidelines to maintain this setting.

Can the MAX6796TPYD3+ be used in AEC-Q100 qualified designs?

While the MAX6796TPYD3+ itself is not individually AEC-Q100 certified, it belongs to the MAX6791–MAX6796 family, several members of which (e.g., MAX6795TPLD2/V+) carry AEC-Q100 qualification. The MAX6796TPYD3+ shares identical die, package, and process with those qualified variants and is widely deployed in automotive applications meeting AEC-Q100 stress test requirements. For formal qualification, consult Analog Devices' latest automotive reliability reports.

What is the purpose of the HOLD pin on the MAX6796TPYD3+?

The HOLD pin on the MAX6796TPYD3+ enables a self-holding circuit: when driven low after initial power-up, it keeps the regulator enabled even if the ENABLE pin is subsequently pulled low. This allows ignition-switched operation-e.g., turning on the regulator with a momentary key signal, then maintaining power until HOLD is released. HOLD is internally pulled up to OUT with a 2μA current source, so leaving it unconnected defaults to standard ENABLE-only control.