Analog Devices Inc./Maxim Integrated MAX6795TPLD3+

Overview

MAX6795TPLD3+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust operation across 5V–72V input and stable 3.3V output at up to 300mA. It features active-low open-drain RESET with 87.5% reset threshold, 50ms fixed reset timeout, and watchdog disable capability. Used in engine control units (ECUs) where load-dump immunity and micropower startup are critical.

For engineers reviewing the MAX6795TPLD3+ datasheet, MAX6795TPLD3+ pinout, MAX6795TPLD3+ application, or MAX6795TPLD3+ equivalent, key selection criteria include its AEC-Q100 qualification, 68μA quiescent current, thermal shutdown at +165°C, adjustable watchdog window, and compatibility with reverse-battery protection via external pFET.

Technical Context

The MAX6795TPLD3+ implements a single LDO regulator with internal feedback reference and precision 1.231V PFI comparator. Its RESET logic monitors OUT voltage with fixed 87.5% threshold (T/S variant), asserts low on undervoltage or watchdog fault, and holds low for 50ms after recovery. The watchdog timer supports fixed 280ms timeout or capacitor-adjustable mode, and can be disabled via WD-DIS.

It integrates HOLD functionality enabling self-holding behavior without external circuitry: once enabled, pulling HOLD low sustains regulation even if ENABLE is removed. The device uses a thermally enhanced 20-pin TQFN-EP package with exposed pad tied to GND for 2.7W power dissipation at +70°C ambient.

Key Specifications

Pinout & Package

MAX6795TPLD3+ is housed in a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package (exposed pad connected to GND). The package supports 2.7W continuous power dissipation and meets AEC-Q100 Grade 0 requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPSD2/V+, MAX6795TPLD3+ offers open-drain RESET for flexible bus interfacing; compared with TLV70733PDRVR, it delivers 300mA, 72V tolerance, and full automotive supervision-making it irreplaceable in ECU/BCM primary power domains.

Availability

MAX6795TPLD3+ is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across extended temperature and high-reliability automotive programs.

Supply support for MAX6795TPLD3+ 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 MAX6795TPLD3+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators with integrated supervision, engineered specifically for automotive ECU power architecture where load-dump resilience, ultra-low IQ, and functional safety support are mandatory.

FAQ

What output voltage does the MAX6795TPLD3+ deliver?

The MAX6795TPLD3+ delivers a fixed 3.3V output (T/S option) with ±1.2% accuracy over -40°C to +125°C. This is confirmed by the "T/S" designation in the part number and electrical characteristics table showing 3.201V to 3.399V at 300mA load. The SET pin is grounded internally for this preset configuration, eliminating need for external feedback resistors.

Does the MAX6795TPLD3+ support reverse-battery protection?

Yes, the MAX6795TPLD3+ 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 GATEP output, blocking current flow. This eliminates the 0.3V–0.7V forward-drop loss of traditional series diodes and reduces thermal stress in 12V/24V automotive systems.

How is the 50ms reset timeout implemented in the MAX6795TPLD3+?

The 50ms reset timeout in MAX6795TPLD3+ is implemented using the D3 option, where the CSRT pin is internally connected to the OUT pin. This selects the factory-trimmed 50ms timeout (35ms–65ms range) without requiring an external capacitor. The timeout begins after OUT rises above the 87.5% reset threshold and holds RESET low for the full duration, ensuring reliable microcontroller initialization.

Can the watchdog timer in the MAX6795TPLD3+ be disabled?

Yes, the watchdog timer in MAX6795TPLD3+ can be disabled using the WD-DIS pin. Driving WD-DIS low disables watchdog monitoring entirely, allowing the device to operate as a pure regulator with RESET asserted only on undervoltage. This is useful during firmware development or in safety states where periodic WDI toggling cannot be guaranteed.

Is the MAX6795TPLD3+ qualified for automotive use?

Yes, the MAX6795TPLD3+ is AEC-Q100 qualified (Grade 0, -40°C to +125°C) and marked with "/V+" suffix indicating automotive qualification. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and ESD per AEC-Q100 Rev H, and is manufactured in IATF 16949-certified facilities-making it suitable for safety-critical ECU and ADAS applications.