Analog Devices Inc./Maxim Integrated MAX5024TASA

Overview

MAX5024TASA from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset supervisor and adjustable output voltage capability. It operates from +6.5V to +65V input, delivers up to 150mA output current, features -60V reverse-battery protection, and provides a preset +3.3V output (T suffix). It is designed for automotive power-supply monitoring in ignition-controlled systems requiring robust brownout detection and self-holding behavior.

For engineers reviewing the MAX5024TASA datasheet, MAX5024TASA pinout, MAX5024TASA application, or MAX5024TASA equivalent, this page delivers verified electrical parameters, thermal performance data, regulator enable/hold timing behavior, reset threshold accuracy (+3.3V version: 2.805V–2.970V), and SO-EP package layout guidance - all specific to the MAX5024TASA variant.

Technical Context

The MAX5024TASA implements a BiCMOS-based linear regulation architecture with internal bandgap reference (1.248V at SET pin), active-low open-drain RESET output with 140–260ms timeout, and dual-mode feedback: fixed +3.3V when SET = GND, or adjustable +2.5V to +11V via external resistor divider. Its HOLD input enables latch-up without external components by internally pulling HOLD to OUT with 4µA current.

It integrates reverse-battery protection (-60V at IN), thermal shutdown at +150°C with 20°C hysteresis, short-circuit current limiting (~175–300mA), and operates across -40°C to +125°C. The EN input is active-high with 2.4V turn-on threshold and 5MΩ internal pull-down; shutdown current is ≤16µA.

Key Specifications

Pinout & Package

MAX5024TASA uses an 8-pin surface-mount SO-EP (Small Outline–Exposed Pad) package with thermally enhanced copper pad on underside for junction-to-board heat transfer. The exposed pad must be soldered to a large PCB ground plane to achieve θJA = 41°C/W and sustain full 150mA output.

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 at higher threshold for improved noise margin, while TPS7B8733QKVURQ1 trades integrated functionality for automotive qualification - neither is pin-compatible, and both require PCB redesign to accommodate missing HOLD/RESET pins or added external components.

Availability

MAX5024TASA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, fire alarm control panels, 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 integrated regulation, supervision, and fault protection in a single SO-EP package for automotive and industrial systems.

FAQ

What is the exact output voltage tolerance of MAX5024TASA over temperature and load?

The MAX5024TASA delivers a nominal +3.3V output with guaranteed tolerance of ±3.5% across -40°C to +125°C and 1mA to 150mA load current, corresponding to 3.168V minimum and 3.432V maximum. This is specified in the Electrical Characteristics table under "Output Voltage" for the 3.3V version with SET = GND. The MAX5024TASA achieves this using factory-trimmed internal feedback resistors.

How does the HOLD function behave when used with MAX5024TASA in an automotive ignition circuit?

In an automotive ignition circuit, MAX5024TASA's HOLD input enables self-holding: when EN is pulled high by ignition, then HOLD is driven low (e.g., by MCU GPIO), the regulator remains ON even if EN returns low. Releasing HOLD (letting it float or pulling high) shuts down the regulator. Internally, HOLD is pulled up to OUT with 4µA, so connecting it directly to OUT achieves latching without external components - a key feature for ignition-switched modules.

Does MAX5024TASA include watchdog timer functionality like MAX5023?

No, MAX5024TASA does not include a watchdog timer. The watchdog input (WDI) is exclusive to the MAX5023 family. MAX5024TASA replaces WDI with the SET pin for output voltage configuration. The datasheet explicitly states "MAX5024 includes a SET input… MAX5023 includes a watchdog input". Therefore, MAX5024TASA provides reset supervision based solely on VOUT monitoring, not pulse train validation.

What thermal design guidance applies to MAX5024TASA's SO-EP package?

MAX5024TASA's SO-EP package requires the exposed pad to be soldered to a large PCB ground plane to achieve θJA = 41°C/W. At +70°C ambient, maximum power dissipation is 1.538W; above that, it derates by 19.2mW/°C. For example, at +95°C ambient, allowable dissipation drops to ~1.057W. To sustain 150mA at +14V input and +3.3V output, ensure board layout provides ≥1 in² of copper connected to the exposed pad.

Can MAX5024TASA be configured for adjustable output voltage?

Yes, MAX5024TASA supports adjustable output mode. Though shipped with +3.3V fixed output (T suffix), its SET pin allows reconfiguration: disconnect SET from GND and connect it to a resistive divider between OUT and GND. Using VOUT = 1.248V × (1 + R1/R2), outputs from +2.5V to +11V are achievable. The MAX5024TASA retains all other features - including HOLD, RESET, and reverse-battery protection - in adjustable mode.