Analog Devices Inc./Maxim Integrated MAX5024MASA

Overview

The MAX5024MASA from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset supervisor and SET-input-based output voltage selection. It operates from +6.5V to +65V input, delivers up to 150mA output current, features 60μA no-load quiescent current, -60V reverse-battery protection, and is qualified for automotive applications (-40°C to +125°C). It serves as a primary power supply and system monitor in ignition-controlled vehicle subsystems.

For engineers reviewing the MAX5024MASA datasheet, MAX5024MASA pinout, MAX5024MASA application, or MAX5024MASA equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world design implementation guidance for automotive and industrial high-reliability power management.

Technical Context

The MAX5024MASA implements a BiCMOS linear regulator architecture with internal bandgap reference (1.248V), adjustable feedback via SET pin, and dual-mode operation: fixed +5V output when SET = GND, or programmable +2.5V to +11V output using external resistor divider. Its active-low open-drain RESET output asserts when VOUT drops below 92.5% of nominal (e.g., 4.625V for +5V version) and remains low for 200ms after recovery.

Control logic integrates EN (active-high enable) and HOLD (active-low hold) inputs to support self-holding behavior-asserting HOLD low after enabling locks the regulator ON regardless of subsequent EN state. Thermal shutdown activates at +150°C with 20°C hysteresis, and short-circuit protection sustains continuous operation at VIN ≤ +14V.

Key Specifications

Pinout & Package

The MAX5024MASA is housed in an 8-pin SO-EP (small-outline integrated circuit with exposed pad) package. The exposed pad must be soldered to PCB ground plane for thermal dissipation (θJC = 2°C/W, θJA = 41°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX5024MASA, MAX5024LASA offers identical functionality with minor reset threshold variation suitable for drop-in qualification reuse, while TPS7B8750QKVURQ1 trades integrated features for lower IQ and requires added external circuitry-making MAX5024MASA optimal for space-constrained, feature-integrated automotive modules.

Availability

MAX5024MASA is available at Aetrix Electronics and suitable for automotive body control, industrial PLC I/O, and fire alarm system designs requiring stable component supply, AEC-Q100-compliant performance, and long-term lifecycle continuity.

Supply support for MAX5024MASA 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 MAX5023/MAX5024 product line delivers high-voltage linear regulators with integrated reset and control features specifically for automotive power domains where reverse-battery survival, thermal robustness, and ignition-switched latching are mandatory.

FAQ

What is the fixed output voltage of the MAX5024MASA?

When the SET pin is connected to ground, the MAX5024MASA delivers a fixed +5.0V output with ±2% tolerance (4.8V to 5.2V) across load (1mA–150mA) and temperature (-40°C to +125°C). This is confirmed in the Electrical Characteristics table under "Output Voltage" for the 5V version. The MAX5024MASA does not support +3.3V fixed output - that variant is designated MAX5024SASA or MAX5024TASA.

Does the MAX5024MASA include a watchdog timer like the MAX5023?

No, the MAX5024MASA does not include a watchdog timer. The watchdog input (WDI) and associated timing circuitry are exclusive to the MAX5023 family. The MAX5024MASA instead features the SET pin for output voltage configuration. This functional distinction is explicitly stated in the General Description, Pin Configurations, and Selector Guide sections of the datasheet.

How does the HOLD function work on the MAX5024MASA?

The HOLD input on the MAX5024MASA is an active-low signal that latches the regulator ON after initial enable. When HOLD is pulled low *after* EN goes high, the regulator remains active even if EN later returns low - enabling ignition-switched self-holding without external components. Releasing HOLD (by disconnecting or pulling high) shuts down the device. This behavior is documented in Table 1 (Truth Table) and Figure 3 (Enable and Hold Behavior).

What thermal derating applies to the MAX5024MASA at +100°C ambient?

At +100°C ambient, the MAX5024MASA's maximum power dissipation is derated to 1.538W − (0.01923W/°C × (100°C − 70°C)) = 0.961W. Using VIN = +14V and VOUT = +5V, the maximum sustainable output current is approximately 107mA (0.961W ÷ 9V). This calculation follows the formula and derating curve in the Applications Information section (Figure 5 and Example 1).

Can the MAX5024MASA be used with ceramic output capacitors?

Yes, the MAX5024MASA supports ceramic output capacitors, but requires minimum 15μF capacitance with ESR < 0.5Ω for stability across -40°C to +125°C. X7R or X5R dielectrics are recommended; Z5U/Y5V types require ≥22μF due to capacitance loss at low temperatures. This guidance is specified in the "Capacitor Selection and Regulator Stability" section of the datasheet.