Analog Devices Inc./Maxim Integrated MAX5024SASA/V+T

Overview

MAX5024SASA/V+T from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset circuit, fixed +3.3V output, automotive-grade qualification (-40°C to +125°C), -60V reverse-battery protection, and 60μA no-load quiescent current. It delivers up to 150mA output current and features HOLD/EN control for self-holding operation in ignition-switched automotive power systems.

For engineers reviewing the MAX5024SASA/V+T datasheet, MAX5024SASA/V+T pinout, MAX5024SASA/V+T application, or MAX5024SASA/V+T equivalent, key selection criteria include input voltage range (+6.5V to +65V), reset threshold tolerance (−7.5% for 3.3V version), thermal shutdown behavior (150°C trip, 20°C hysteresis), and SO-EP package thermal performance (θ_JA = 41°C/W).

Technical Context

The MAX5024SASA/V+T implements a BiCMOS linear regulator architecture with internal bandgap reference and precision error amplifier. Its SET pin is internally connected to ground, configuring the device for fixed +3.3V output with ±3.6% tolerance over temperature and load (3.168V to 3.432V at 1–150mA). The active-low open-drain RESET output asserts when V_OUT falls below 2.805V (−15.5% of nominal) and remains low for 200ms after recovery.

Control logic integrates EN (active-high enable) and HOLD (active-low latching) inputs to support automotive "ignition-on → hold-on → ignition-off" sequencing without external components. The HOLD pin is internally pulled up to V_OUT with 4μA current, enabling latch behavior when driven low after EN activation. Reverse-battery protection operates down to −60V at IN, limiting reverse leakage to ≤10μA.

Key Specifications

Pinout & Package

MAX5024SASA/V+T uses an 8-pin surface-mount SO-EP (Small Outline–Exposed Pad) package with thermally enhanced copper pad soldered to PCB ground plane for optimal heat dissipation (θ_JC = 2°C/W). The exposed pad (EP) must be connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX5024MASA/V+T and TPS7B8733QKVURQ1, the MAX5024SASA/V+T uniquely combines −60V reverse-battery tolerance, self-holding control, and 3.3V fixed output in a single SO-EP package - making it optimal for ignition-latched, battery-connected automotive subsystems requiring robust 3.3V regulation.

Availability

MAX5024SASA/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial fire alarm panels, telematics control units, and industrial PLC I/O modules requiring stable component supply under extended temperature and harsh electrical conditions.

Supply support for MAX5024SASA/V+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 automotive, industrial, and communications markets.

The MAX5023/MAX5024 product line targets high-reliability automotive power systems requiring wide-input linear regulation, integrated reset supervision, and reverse-battery survivability - especially in BCM, telematics, and safety-critical modules.

FAQ

What is the exact reset threshold voltage for MAX5024SASA/V+T?

The MAX5024SASA/V+T has a guaranteed reset threshold range of 2.805V to 2.970V (−15.5% to −10% of nominal 3.3V output), specified over −40°C to +125°C and 1–150mA load. This corresponds to the "S" suffix in the Selector Guide and is confirmed in the Electrical Characteristics table under V_TH for MAX502_S, SET = GND. The MAX5024SASA/V+T asserts RESET low when V_OUT drops below this threshold and holds low for 200ms after recovery.

Does MAX5024SASA/V+T support adjustable output voltage?

No, the MAX5024SASA/V+T does not support adjustable output voltage. Its SET pin is internally connected to ground, configuring the device exclusively for fixed +3.3V output. Adjustable operation (2.5V–11V) requires the MAX5024 with "L", "M", or "T" suffix and external resistor divider between SET and OUT - which is not implemented in the MAX5024SASA/V+T variant per the Selector Guide and Pin Description table.

What is the maximum continuous output current for MAX5024SASA/V+T at +105°C ambient?

At +105°C ambient, the MAX5024SASA/V+T's allowable package power dissipation is 1.538W − (0.01923W/°C × (105°C − 70°C)) = 1.538W − 0.673W = 0.865W. With V_IN = +14V and V_OUT = +3.3V, maximum output current is 0.865W / (14V − 3.3V) ≈ 81mA. This is below the 150mA absolute limit, so thermal design governs usable current - confirming the need for proper SO-EP pad thermal coupling.

How does the HOLD function behave when EN is toggled while HOLD is low on MAX5024SASA/V+T?

When HOLD is held low, the MAX5024SASA/V+T enters self-holding mode: the regulator remains ON regardless of EN state. If EN transitions from high to low while HOLD is low, output stays active. To shut down, EN must first go low, then HOLD must be released (allowed to float or pulled high relative to V_OUT). The internal 4μA pull-up to V_OUT ensures HOLD releases cleanly when disconnected, triggering shutdown within microseconds per the ENABLE AND HOLD TIMING diagram.

Is MAX5024SASA/V+T qualified for automotive applications?

Yes, the "/V" in MAX5024SASA/V+T denotes AEC-Q100 automotive qualification. It operates across −40°C to +125°C, includes −60V reverse-battery protection, and is packaged in thermally enhanced SO-EP for under-hood reliability. The datasheet explicitly lists "Automotive" in Applications and specifies automotive temperature range in both General Description and Absolute Maximum Ratings - confirming its suitability for body control, telematics, and safety systems.