Analog Devices Inc./Maxim Integrated MAX6795TPMD3+

Overview

The MAX6795TPMD3+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions-including reset, watchdog timer, power-fail detection, and hold control-designed for automotive systems. It operates from 5V to 72V input, delivers up to 300mA output current, features 68μA quiescent current, and provides a fixed 3.3V output with 87.5% reset threshold and 50ms reset timeout. 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 MAX6795TPMD3+ datasheet, MAX6795TPMD3+ pinout, MAX6795TPMD3+ application, or MAX6795TPMD3+ equivalent, this page delivers verified specifications, thermal-aware package details, automotive-grade AEC-Q100 context, and real-world supervisory timing behavior-not generic regulator claims.

Technical Context

The MAX6795TPMD3+ implements a single LDO regulator with internal pFET pass device, supporting 3.3V fixed output (T/S option per ordering code) and dropout voltage as low as 1200mV at 300mA. Its supervisory block integrates a dual-mode watchdog (fast/slow fault detection disabled here), capacitor-adjustable reset timeout (50ms via CSRT), and open-drain RESET output asserting low when VOUT drops below 2.888V (87.5% of 3.3V).

It includes ENABLE and HOLD inputs enabling self-holding circuitry without external components: once enabled, pulling HOLD low sustains regulation even after ENABLE returns low; releasing HOLD shuts down the output. All functions operate across –40°C to +125°C and include thermal shutdown (+165°C), short-circuit protection, and output overvoltage clamp at 1.05×VOUT.

Key Specifications

Pinout & Package

MAX6795TPMD3+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND. The package dissipates up to 2.7W and supports operation at high ambient temperatures, high VIN, 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 MAX6795TPSD2/V+, the MAX6795TPMD3+ offers longer reset assertion for robust cold-crank recovery; compared with TLV70733PDQNR, it delivers full automotive-grade supervision and 72V resilience - making it irreplaceable in ECU/BCM designs.

Availability

MAX6795TPMD3+ is available at Aetrix Electronics and suitable for engine control units, body control modules, and telematics gateways requiring stable component supply across extended temperature and high-reliability automotive programs.

Supply support for MAX6795TPMD3+ 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 MAX6795TPMD3+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators with integrated supervision - engineered specifically for automotive ECU power sequencing, fail-safe monitoring, and reverse-battery protection.

FAQ

What output voltage does the MAX6795TPMD3+ provide?

The MAX6795TPMD3+ provides a fixed 3.3V output with ±1.2% tolerance over temperature and line/load. This is confirmed by the "T/S" designation in the ordering code and verified in the Electrical Characteristics table (VOUT = 3.201V to 3.399V at 300mA, VIN = 6V). The SET pin is internally connected to GND for preset operation - no external feedback resistors are required for this variant.

Does the MAX6795TPMD3+ support reverse-battery protection?

Yes, the MAX6795TPMD3+ supports reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When reverse polarity is applied, the internal circuitry disables the MOSFET, blocking current flow. This eliminates the power loss and heat generation of a series Schottky diode - a key advantage in high-current automotive applications where efficiency and thermal margin are critical.

How is the 50ms reset timeout implemented in the MAX6795TPMD3+?

The 50ms reset timeout in the MAX6795TPMD3+ is implemented using the D3 option, where the CSRT pin is internally connected to the OUT pin - no external capacitor is required. This matches the "D3" suffix in the part number and is confirmed in Table 2 of the datasheet. The timeout remains stable across temperature (±10% variation from –40°C to +125°C), ensuring consistent reset behavior during cold cranking and hot soak conditions.

Is the MAX6795TPMD3+ AEC-Q100 qualified?

The MAX6795TPMD3+ is not explicitly marked with /V+ in its part number and is not listed in the AEC-Q100 qualified variants (e.g., MAX6795TPLD2/V+, MAX6795TPSD2/V+). While it shares the same die and operates across –40°C to +125°C, formal AEC-Q100 stress testing and certification apply only to /V+ suffix versions. For production automotive applications requiring qualification documentation, MAX6795TPSD2/V+ is the compliant alternative.

What is the role of the HOLD pin on the MAX6795TPMD3+?

The HOLD pin on the MAX6795TPMD3+ enables a self-holding circuit: when pulled low after initial ENABLE activation, it maintains regulator output even if ENABLE returns low - eliminating need for external latch components. HOLD is internally pulled up to OUT with a 2µA current source, so leaving it unconnected or tying it to OUT makes ENABLE function as a standard ON/OFF switch. This feature simplifies ignition-controlled power architecture in ECUs and BCMs.