Analog Devices Inc./Maxim Integrated MAX6795TPSD2/V+

Overview

MAX6795TPSD2/V+ from Maxim Integrated is an AEC-Q100 qualified, single-output, high-voltage linear regulator with integrated supervisory functions including RESET, watchdog timer, and power-fail detection. 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 12.5ms reset timeout - designed for automotive body control modules and infotainment power rails.

For engineers reviewing the MAX6795TPSD2/V+ datasheet, MAX6795TPSD2/V+ pinout, MAX6795TPSD2/V+ application, or MAX6795TPSD2/V+ equivalent, key selection criteria include its -40°C to +125°C operation, TQFN-20 package thermal performance (2.7W dissipation), dual-mode watchdog configurability, HOLD-enabled self-holding circuit implementation, and reverse-battery protection via GATEP drive.

Technical Context

The MAX6795TPSD2/V+ implements a single LDO regulator with internal pFET pass element, supporting fixed 3.3V output (T/S option per ordering code) and 92.5%/87.5% reset threshold selection. Its supervisory block integrates a capacitor-adjustable reset timeout (D2 = 12.5ms nominal), fixed 280ms watchdog timeout, and active-low open-drain RESET output referenced to OUT.

It features dual enable logic: ENABLE controls regulator startup, while HOLD sustains regulation after ENABLE release by pulling low - enabling ignition-key-triggered latching without external components. The device also includes PFI comparator (1.231V threshold), GATEP p-channel MOSFET driver for reverse-battery protection, and thermal/short-circuit/output overvoltage protection.

Key Specifications

Pinout & Package

MAX6795TPSD2/V+ is housed in a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package (exposed pad connected to GND), rated for 2.7W power dissipation at +70°C ambient - enabling continuous operation in high-temperature automotive environments without forced cooling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage automotive LDO applications.

Compared with MAX6795TPLD2/V+, the MAX6795TPSD2/V+ delivers identical reliability and thermal performance but targets 3.3V systems, while the TPS7B8733QKVURQ1 reduces quiescent current by 56% at the expense of integrated supervision - requiring additional components for reset and watchdog functionality.

Availability

MAX6795TPSD2/V+ is available at Aetrix Electronics and suitable for automotive body control modules, telematics units, infotainment systems, and ADAS sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6795TPSD2/V+ 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 MAX6795TPSD2/V+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators engineered specifically for automotive power-supply supervision - integrating LDO regulation, reset generation, watchdog monitoring, and reverse-battery protection in a single AEC-Q100 qualified package.

FAQ

What output voltage does the MAX6795TPSD2/V+ provide?

The MAX6795TPSD2/V+ provides a fixed 3.3V output voltage with ±2.5% tolerance over -40°C to +125°C. This is confirmed by the "T/S" designation in the part number 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, eliminating external feedback components.

Does the MAX6795TPSD2/V+ support reverse-battery protection?

Yes, the MAX6795TPSD2/V+ 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 need for a series Schottky diode and its associated 0.3V forward drop, improving efficiency and thermal performance in automotive installations.

How is the reset timeout period configured on the MAX6795TPSD2/V+?

The MAX6795TPSD2/V+ uses the D2 suffix to indicate a factory-configured 12.5ms reset timeout period. Internally, this is implemented by connecting the CSRT pin to OUT, selecting the D2 option from the reset timeout selector table. No external capacitor is required - the timing is fixed and guaranteed over temperature (-40°C to +125°C) with ±20% variation per datasheet specifications.

Can the watchdog timer on the MAX6795TPSD2/V+ be disabled?

Yes, the watchdog timer on the MAX6795TPSD2/V+ can be disabled using the WD-DIS pin. Driving WD-DIS low disables the watchdog function entirely, preventing RESET assertion due to WDI timeout. When WD-DIS is high or connected to OUT, the watchdog remains active with its default 280ms timeout period. This disable capability allows flexible integration in systems where software-level supervision suffices.

What is the purpose of the HOLD pin on the MAX6795TPSD2/V+?

The HOLD pin on the MAX6795TPSD2/V+ enables self-holding circuit operation: when pulled low after ENABLE is asserted, it keeps the regulator ON even if ENABLE subsequently returns low. This allows ignition-switch-triggered power sequencing without external latching components. HOLD is internally pulled up to OUT with 2µA current, so leaving it unconnected makes ENABLE function as a standard ON/OFF control.