Analog Devices Inc./Maxim Integrated MAX6793TPTD1+

Overview

MAX6793TPTD1+ from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 150mA per output across a 5V–72V input range, features 68μA quiescent current, fixed 5V/3.3V outputs (this variant: 3.3V on OUT1, 5V on OUT2), and includes RESET, watchdog, HOLD, and PFI/PFO monitoring - deployed in engine control units and ADAS domain controllers.

For engineers reviewing the MAX6793TPTD1+ datasheet, MAX6793TPTD1+ pinout, MAX6793TPTD1+ application, or MAX6793TPTD1+ equivalent, key selection criteria include dual-rail voltage supervision under load-dump conditions, capacitor-adjustable reset/watchdog timeout, thermal shutdown at +165°C, and AEC-Q100-compliant operation from –40°C to +125°C.

Technical Context

The MAX6793TPTD1+ implements two independent LDO regulators: OUT1 is adjustable or preset (here 3.3V, ±1.5% over temperature), OUT2 is fixed 5V (±1.5%). Its supervisory block integrates a windowed watchdog timer (with WDS0/WDS1 select), active-low open-drain RESET with 35µs propagation delay, and a 1.231V precision PFI comparator feeding PFO.

Control logic supports self-holding via HOLD (internally pulled to OUT1), dual enable inputs (ENABLE1/ENABLE2), and reverse-battery protection via GATEP-driven pFET. All protections - thermal shutdown (+165°C, 20°C hysteresis), short-circuit current limiting (200–240mA), and output overvoltage clamping (105–110% VOUT) - are fully specified across the full automotive temperature range.

Key Specifications

Pinout & Package

MAX6793TPTD1+ is housed in a thermally enhanced 20-pin TQFN-EP (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous dissipation and enables compact, high-reliability PCB layouts in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output automotive LDO applications.

Compared with MAX6794TPTD1+, the MAX6793TPTD1+ omits windowed watchdog select pins but retains identical dual-rail regulation, HOLD, and GATEP functionality - making it optimal for cost-constrained ECU designs requiring robust supervision without advanced watchdog modes. Versus TPS7B8750QKVURQ1, MAX6793TPTD1+ adds critical dual-rail support, reverse-battery drive, and self-hold - essential for integrated automotive power nodes.

Availability

MAX6793TPTD1+ is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for MAX6793TPTD1+ 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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing reliability, integration, and power efficiency.

The MAX6791–MAX6796 product line targets automotive power management with ultra-low IQ, wide VIN, and integrated supervision - specifically engineered to replace discrete LDO + reset + watchdog solutions in ECU and domain controller designs.

FAQ

What output voltages does the MAX6793TPTD1+ provide?

The MAX6793TPTD1+ provides two regulated outputs: OUT1 is preset to 3.3V (±1.5% over –40°C to +125°C), and OUT2 is fixed at 5V (±1.5%). Both outputs deliver up to 150mA. The 3.3V output is selected by grounding the SET1 pin; no external resistors are needed for this configuration. The MAX6793TPTD1+ datasheet confirms these values in Table 1 and Electrical Characteristics sections.

Does the MAX6793TPTD1+ support reverse-battery protection?

Yes, the MAX6793TPTD1+ 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, blocking current flow and protecting downstream circuitry. This eliminates the need for lossy series diodes. The MAX6793TPTD1+ specification sheet details GATEP drive voltage (8–12V) and clamp limits (13.8–18.8V) under reverse conditions.

How is the reset timeout period configured on the MAX6793TPTD1+?

The MAX6793TPTD1+ uses the CSRT pin to configure reset timeout: connecting CSRT to OUT1 selects the internal 50ms (D3) timeout, as indicated by the "D1" suffix in the part number MAX6793TPTD1+. Alternatively, a capacitor from CSRT to GND enables user-defined timing (e.g., 35µs to 260ms). The MAX6793TPTD1+ Electrical Characteristics table lists D3 as 35–65ms, with typical 50ms at +25°C.

Is the MAX6793TPTD1+ AEC-Q100 qualified?

Yes, the MAX6793TPTD1+ is AEC-Q100 qualified - specifically rated for Grade 0 (–40°C to +150°C junction temperature). While the device's operating ambient range is –40°C to +125°C, its qualification extends beyond that to meet stringent automotive reliability standards. This is confirmed in the datasheet's Ordering Information table and Applications section, which explicitly cites AEC-Q100 for related variants including MAX6795TPLD2/V+.

What is the function of the HOLD pin on the MAX6793TPTD1+?

The HOLD pin on the MAX6793TPTD1+ enables self-holding operation: when pulled low after initial enable, it keeps OUT1 and OUT2 active even if ENABLE1 or ENABLE2 are subsequently deasserted. Releasing HOLD (pulling high or leaving floating) shuts down both outputs. Internally, HOLD is pulled up to OUT1 with a 2µA current source, simplifying implementation. This behavior is documented in the "Enable and Hold Inputs" section of the MAX6793TPTD1+ datasheet.