Analog Devices Inc./Maxim Integrated MAX6796TPMD4+

Overview

The MAX6796TPMD4+ from Maxim Integrated is a single-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection, and hold control), designed for automotive systems requiring high-voltage tolerance and robust fault management. It operates from 5V to 72V input, delivers up to 300mA output current, features a 5V fixed output (as indicated by 'M' in suffix), and provides a 200ms reset timeout period (D4). It is used in engine control units (ECUs) and body control modules where load-dump resilience and microprocessor supervision are critical.

For engineers reviewing the MAX6796TPMD4+ datasheet, MAX6796TPMD4+ pinout, MAX6796TPMD4+ application, or MAX6796TPMD4+ equivalent, key selection considerations include its AEC-Q100-qualified 20-pin TQFN package, 68μA quiescent current, 420mV typical dropout at 100mA, 92.5% reset threshold relative to VOUT, and capacitor-adjustable watchdog timeout - all validated across –40°C to +125°C.

Technical Context

The MAX6796TPMD4+ integrates a high-voltage linear regulator with a precision 1.231V internal reference for PFI comparison, a dual-mode watchdog timer (fixed 280ms or adjustable via CSWT), and a RESET generator with programmable timeout (D4 = 200ms). Its control logic includes thermal shutdown (+165°C), short-circuit protection (480mA limit), and output overvoltage clamping at 1.1×VOUT.

It implements a self-holding circuit via the HOLD input (internally pulled to OUT with 2µA), enabling ignition-controlled latching without external components. The ENABLE input is active-high with 0.5µA internal pulldown, and the regulator supports reverse-battery protection via GATEP-driven pFET gate drive.

Key Specifications

Pinout & Package

MAX6796TPMD4+ is housed in a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package (exposed pad connected to GND), rated for 2.7W continuous dissipation. The exposed pad must be soldered to PCB ground plane for thermal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPMD4+, the MAX6796TPMD4+ adds AEC-Q100 qualification and automotive temperature grading; compared with TLV70750PDQNR, it provides full high-voltage supervision, fault protection, and latching - essential for primary automotive power domains.

Availability

MAX6796TPMD4+ is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera ECUs requiring stable component supply under harsh automotive conditions.

Supply support for MAX6796TPMD4+ 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 MAX6796TPMD4+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators, engineered specifically for automotive subsystems needing reliable power sequencing, fault supervision, and extended temperature operation.

FAQ

What output voltage does the MAX6796TPMD4+ provide?

The MAX6796TPMD4+ provides a fixed 5V output, as confirmed by the 'M' in its ordering code (per Maxim's selector guide). This is achieved by connecting the SET pin to GND. The device also supports adjustable outputs from 1.8V to 11V using an external resistive divider, but the MAX6796TPMD4+ variant is factory-configured for 5V. Output accuracy is ±2.5% over temperature and load.

How is the 200ms reset timeout implemented in the MAX6796TPMD4+?

The MAX6796TPMD4+ achieves its 200ms reset timeout via the 'D4' suffix designation, which configures the internal reset timer. This is accomplished by connecting the CSRT pin to the OUT pin, selecting the fixed D4 timeout option (140ms to 260ms range, typical 200ms). The timeout begins after OUT rises above the 92.5% reset threshold and holds RESET low for the full duration, ensuring robust MCU initialization.

Does the MAX6796TPMD4+ support reverse-battery protection?

Yes, the MAX6796TPMD4+ supports reverse-battery protection through its GATEP pin, which drives the gate of an external p-channel MOSFET. When reverse polarity is applied, the internal circuitry disables GATEP, turning off the pFET and blocking current flow. This eliminates the power loss and heat generation of traditional series diodes, preserving efficiency in 12V automotive systems.

What is the purpose of the HOLD pin on the MAX6796TPMD4+?

The HOLD pin on the MAX6796TPMD4+ enables a self-holding circuit: when pulled low after initial enable, it keeps the regulator ON even if the ENABLE pin is subsequently deasserted. This allows ignition-switched systems to remain powered during key-off transitions. HOLD is internally pulled up to OUT with 2µA, so leaving it unconnected makes ENABLE function as a standard on/off control.

Is the MAX6796TPMD4+ qualified for automotive use?

Yes, the MAX6796TPMD4+ is AEC-Q100 qualified (Grade 0: –40°C to +125°C), as confirmed by Maxim's official documentation and ordering information. It undergoes stress testing for temperature cycling, humidity, and mechanical shock, and is manufactured in certified automotive-grade processes - making it suitable for safety-critical ECU and ADAS applications.