Analog Devices Inc./Maxim Integrated MAX6795TPSD2+T

Overview

The MAX6795TPSD2+T from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection, and hold control), designed for automotive systems requiring robust operation across 5V–72V input and -40°C to +125°C ambient. It delivers up to 300mA at fixed 3.3V output, features 68μA quiescent current, 12.5ms capacitor-adjustable reset timeout (D2), and AEC-Q100 qualified thermal protection - used in engine control units and ADAS domain controllers.

For engineers reviewing the MAX6795TPSD2+T datasheet, MAX6795TPSD2+T pinout, MAX6795TPSD2+T application, or MAX6795TPSD2+T equivalent, key selection criteria include its 3.3V fixed output with 87.5% reset threshold, dual-mode watchdog disable capability, HOLD-enabled self-holding circuit implementation, and TQFN-20EP package compatibility with high-temperature automotive PCB layouts.

Technical Context

This device integrates a low-dropout linear regulator with precision voltage reference, comparator-based RESET generation tied to OUT voltage, and a configurable watchdog timer that monitors WDI transitions using either fixed (280ms min) or capacitor-adjusted timeout periods. The reset assertion logic includes hysteresis and supports both push-pull and open-drain outputs.

The HOLD input enables latch-up behavior without external components: once enabled, pulling HOLD low sustains regulation even after ENABLE returns low; releasing HOLD shuts down OUT. The GATEP pin drives an external pFET for reverse-battery protection, eliminating series diode losses while maintaining <1.2V overhead at 300mA.

Key Specifications

Pinout & Package

MAX6795TPSD2+T uses a 20-pin thermally enhanced TQFN-EP (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected to GND for optimal thermal dissipation (2.7W max). Pin count and layout match MAX6791–MAX6796 family; no NC pins in MAX6795 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6795TPSD2+T, MAX6795TPLD2/V+ adds formal AEC-Q100 validation and automotive traceability without changing electrical behavior, while TLV70733PDQNR sacrifices supervision, voltage range, and thermal robustness for smaller size and lower cost in benign environments.

Availability

MAX6795TPSD2+T is available at Aetrix Electronics and suitable for automotive ECU, ADAS domain controller, and telematics gateway designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned performance under harsh environmental conditions.

Supply support for MAX6795TPSD2+T 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, medical, and automotive applications.

The MAX6791–MAX6796 family targets automotive power-supervision needs, combining ultra-low IQ, wide-input regulation, and integrated safety features (RESET, watchdog, reverse-battery protection) into compact TQFN packages.

FAQ

What output voltage does the MAX6795TPSD2+T provide?

The MAX6795TPSD2+T provides a fixed 3.3V output with ±2.5% tolerance over -40°C to +125°C. The "S" in the part number denotes the 3.3V preset option, and the D2 suffix specifies a 12.5ms reset timeout period. This output is optimized for powering automotive microcontrollers, CAN transceivers, and sensor interfaces without external feedback components.

Does the MAX6795TPSD2+T support reverse-battery protection?

Yes, the MAX6795TPSD2+T 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 FET, blocking current flow and protecting downstream circuitry - eliminating the need for lossy series diodes while maintaining low overhead voltage.

How is the reset timeout period configured on the MAX6795TPSD2+T?

The MAX6795TPSD2+T uses the D2 reset timeout option, providing a fixed 12.5ms reset assertion duration. This is implemented by connecting the CSRT pin to the OUT pin (as specified in the datasheet). Alternatively, a capacitor from CSRT to GND enables user-adjustable timeout periods ranging from 35μs to 260ms, but D2 configures the internal fixed value.

Is the MAX6795TPSD2+T AEC-Q100 qualified?

The MAX6795TPSD2+T is not explicitly marked as AEC-Q100 qualified in its ordering code. However, the related MAX6795TPLD2/V+ variant carries the "/V+" suffix indicating full AEC-Q100 qualification. Both share identical electrical specifications and thermal performance, but only the /V+ version includes documented automotive qualification test reports and traceability.

What is the function of the HOLD pin on the MAX6795TPSD2+T?

The HOLD pin on the MAX6795TPSD2+T enables self-holding circuit operation: when pulled low after initial enable, it maintains regulator output (OUT) even if ENABLE is subsequently deasserted. Releasing HOLD (letting it float or pulling high) shuts down the output. This allows ignition-key-triggered power sequencing without external latching components in automotive body control modules.