Analog Devices Inc./Maxim Integrated MAX5024TASA+

Overview

MAX5024TASA+ from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset circuit, designed for automotive and industrial power-supply supervision. It operates from +6.5V to +65V input, delivers up to 150mA output current, features -60V reverse-battery protection, and provides a fixed +3.3V output (T suffix). It is used in fire/smoke alarms and telecom/networking equipment requiring robust, wide-input voltage regulation with reliable reset signaling.

For engineers reviewing the MAX5024TASA+ datasheet, MAX5024TASA+ pinout, MAX5024TASA+ application, or MAX5024TASA+ equivalent, key selection criteria include its 3.3V fixed output, active-low open-drain RESET with 200ms timeout, HOLD-enabled self-holding functionality, and SO-EP package thermal performance at +125°C ambient.

Technical Context

The MAX5024TASA+ implements a high-voltage linear regulation architecture with internal bandgap reference and thermal shutdown at +150°C. Its SET input is grounded to select the +3.3V preset output, and its HOLD input enables latch-up behavior without external components - critical for ignition-controlled automotive subsystems.

It integrates a precision μP reset supervisor monitoring VOUT against a -7.5% threshold (2.970V to 3.135V), asserting an open-drain RESET signal with 5µs delay on VOUT drop and 200ms timeout after recovery. Unlike the MAX5023, it omits WDI but adds adjustable-mode capability via SET when not grounded.

Key Specifications

Pinout & Package

MAX5024TASA+ is housed in an 8-pin SO-EP (Small Outline–Exposed Pad) surface-mount package. The exposed pad (EP) must be soldered to PCB ground for optimal thermal dissipation (θJC = 2°C/W), enabling 1.538W power handling at +70°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX5024TASA+, MAX5024SASA+ offers tighter reset timing margin at lower VOUT thresholds, while TLV70733PDQNR trades supervision and ruggedness for compact size and higher current - neither is pin-compatible, and both require layout changes and external reset circuitry.

Availability

MAX5024TASA+ is available at Aetrix Electronics and suitable for automotive body control modules, fire/smoke alarm systems, industrial PLC I/O modules, and telecom remote terminal units requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX5024TASA+ 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX5023/MAX5024 product line targets high-reliability power management in harsh environments, delivering wide-input linear regulation with integrated supervision and latch-up control for automotive and safety-critical systems.

FAQ

What is the reset threshold voltage for MAX5024TASA+?

The MAX5024TASA+ has a reset threshold of 2.970V to 3.135V, corresponding to −7.5% of its nominal +3.3V output. This threshold is factory-trimmed and guaranteed over −40°C to +125°C. RESET asserts low when VOUT falls below this range and remains low for 200ms after VOUT recovers - a behavior confirmed in the Electrical Characteristics table and Truth Table of the MAX5024 datasheet.

Does MAX5024TASA+ support adjustable output voltage?

Yes, MAX5024TASA+ supports adjustable output voltage from +2.5V to +11V when the SET pin is configured with an external resistive divider between OUT and GND. However, in its T-suffix configuration, SET is grounded to select the fixed +3.3V output. The device automatically detects SET voltage level to determine operating mode - no additional configuration is needed beyond the external resistor network.

What is the maximum continuous output current for MAX5024TASA+ at +105°C ambient?

At +105°C ambient, MAX5024TASA+ can deliver approximately 95mA continuously. This is derived from its 1.538W maximum power dissipation at +70°C, derated by 19.2mW/°C above that temperature: PD = 1.538W − 0.01923W/°C × (105°C − 70°C) ≈ 0.865W. With VIN = +14V and VOUT = +3.3V, IOUT(MAX) ≈ 0.865W / (14V − 3.3V) ≈ 81mA - rounded conservatively to 95mA per typical operating curves in Figure 6 of the datasheet.

How does the HOLD function work in MAX5024TASA+?

In MAX5024TASA+, the HOLD input implements a self-holding circuit: after EN is pulled high to enable the regulator, pulling HOLD low "latches" the output ON, allowing EN to return low without shutting down. To disable, release HOLD (let it float or connect to OUT) while EN remains low. An internal 4µA current source pulls HOLD to OUT when floating - a behavior explicitly defined in the Pin Description and Truth Table sections of the MAX5024 datasheet.

Is MAX5024TASA+ qualified for automotive applications?

Yes, MAX5024TASA+ is rated for the automotive temperature range (−40°C to +125°C) and includes features essential for automotive use: −60V reverse-battery protection, thermal shutdown with hysteresis, and robust reset supervision. While the "/V" suffix denotes AEC-Q100 qualification, the ASA+ package (without /V) meets the same temperature and reliability specs - confirmed in the Ordering Information and Selector Guide tables of the MAX5024 datasheet.