Analog Devices Inc./Maxim Integrated MAX6765TTSD2+T

Overview

MAX6765TTSD2+T from Maxim Integrated is an automotive-grade micropower linear regulator with integrated supervisor, delivering 3.3V at up to 100mA from 4V–72V input. It features open-drain active-low RESET output, 12.5ms fixed reset timeout (D2 suffix), and operates across –40°C to +125°C. Designed for always-on vehicle modules, it supports ignition-controlled power sequencing in body control units and telematics gateways.

For engineers reviewing the MAX6765TTSD2+T datasheet, MAX6765TTSD2+T pinout, MAX6765TTSD2+T application, or MAX6765TTSD2+T equivalent, key selection criteria include its 31µA quiescent current, AEC-Q100 qualification, 620mV dropout at 100mA/5V (derated for 3.3V), TDFN-6 thermal performance (1.9W dissipation), and compatibility with automotive battery transients up to +80V absolute max input.

Technical Context

The MAX6765TTSD2+T implements a high-voltage NPN pass transistor architecture with internal bandgap reference (1.233V) and precision comparator-based reset supervision. Its ENABLE input is actively pulled down (0.6µA), enabling direct connection to automotive switch signals without external pull-down resistors.

Reset assertion is triggered when OUT falls below 2.888V (S-suffix threshold), with guaranteed deassertion delay of ≥12.5ms after recovery - implemented via internal current source charging TIMEOUT pin to 1.220V threshold. The device integrates overtemperature shutdown (160°C trip, 20°C hysteresis) and short-circuit current limiting (150–250mA).

Key Specifications

Pinout & Package

MAX6765TTSD2+T uses a thermally enhanced 3mm × 3mm, 6-pin TDFN-EP package (package code T633+2) with exposed pad (EP) connected internally to GND. The EP must be soldered to PCB ground plane for θ_JA = 42°C/W (multi-layer board) and 1.9W continuous power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive linear regulator with supervisor applications.

Compared with MAX6765TTLD4+T, MAX6765TTSD2+T provides faster reset release critical for real-time control loops; compared with TLV70733PDQNR, it delivers automotive-grade reliability, extended input range, and integrated supervision - eliminating need for external reset IC and reducing total solution size by 40%.

Availability

MAX6765TTSD2+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial telemetry gateways, and telecom remote power supplies requiring stable component supply across extended temperature and high-reliability environments.

Supply support for MAX6765TTSD2+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, automotive, and communications applications.

The MAX6765–MAX6774B family targets automotive power management with micropower operation, high-voltage tolerance, and integrated supervision - specifically engineered for always-on modules needing AEC-Q100 compliance and robust transient immunity.

FAQ

What is the absolute maximum input voltage rating for MAX6765TTSD2+T?

The MAX6765TTSD2+T has an absolute maximum input voltage rating of +80V, verified per JEDEC JESD78. This rating allows safe operation during ISO 7637-2 load-dump transients common in 12V automotive systems. Operation above 72V is not recommended for continuous use, but the +80V limit provides margin for transient suppression design. Always observe derating curves in the datasheet for power dissipation at elevated input voltages.

Does MAX6765TTSD2+T require external components for basic operation?

Yes, MAX6765TTSD2+T requires two external capacitors for stable operation: a minimum 0.1µF ceramic capacitor from IN to GND and a minimum 10µF tantalum or ceramic capacitor from OUT to GND. No external resistors are needed for fixed 3.3V output operation. The TIMEOUT pin is internally configured for 12.5ms timeout when connected to OUT, eliminating need for timing capacitor in standard applications.

How does the RESET output behave during input voltage ramp-up?

During VIN ramp-up, the MAX6765TTSD2+T asserts RESET low until OUT reaches ≥2.970V (upper reset threshold limit), then holds RESET low for ≥12.5ms before releasing it high. This ensures µP reset is maintained throughout power stabilization. The RESET output remains low for the full timeout period even if OUT overshoots and recovers rapidly - guaranteeing deterministic reset timing independent of input slew rate.

Is MAX6765TTSD2+T pin-compatible with other devices in the MAX6765–MAX6774B family?

Yes, all MAX6765–MAX6774B variants share identical 6-pin TDFN-EP pinout and footprint (T633+2). Pin functions (IN, GND, ENABLE, RESET, TIMEOUT, OUT) are consistent across the family. This allows drop-in replacement for different output voltages (e.g., 5V → 3.3V) or timeout options (D2 → D4) without PCB revision - provided thermal and electrical constraints (e.g., dropout, power dissipation) are verified for the new variant.

What is the thermal performance of MAX6765TTSD2+T on a standard 4-layer PCB?

On a 4-layer PCB with 1oz copper and thermal vias under the EP, MAX6765TTSD2+T achieves θ_JA = 42°C/W and θ_JC = 9°C/W. At ambient +85°C and 100mA load with 14V input, junction temperature rise is ~176°C - exceeding the 150°C absolute max. Derating is required: maximum continuous load at +85°C ambient is 65mA for 3.3V output. Full 100mA is supported only up to +70°C ambient with proper thermal design.