Analog Devices Inc./Maxim Integrated MAX15024AATB+T

Product Summary

The MAX15024AATB+T from Analog Devices Inc./Maxim Integrated is a single-channel, high-speed, high-current low-side MOSFET gate driver. Housed in a compact 10-pin TDFN (3x3 mm) package, this device targets power electronics applications such as synchronous rectifiers in DC-DC converters, power-supply modules, and high-frequency switching power supplies. Its design addresses the challenging demands of low propagation delay, precise timing, and robust current handling, making it a strong candidate for performance-critical power conversion scenarios.

Essential Features and Advantages of the MAX15024AATB+T

At the core of the MAX15024AATB+T’s appeal is its ability to deliver up to 8A peak sinking current and 4A peak sourcing current, enabling the direct, rapid charging and discharging of power MOSFET gates—even under heavy capacitive loading and at switching frequencies up to 1 MHz. Key features include:

Low 16 ns typical propagation delay to improve system response and minimize switching losses

Wide operating supply voltage range from 4.5V to 28V, supporting flexibility in system design

Integrated, adjustable low-dropout (LDO) regulator for gate-drive amplitude tuning

Supports both TTL and CMOS logic inputs with noise immunity

Separate supply input for the output driver to support soft-start sequencing and enable independent output voltage control

Built-in thermal shutdown and robust operation across –40°C to +125°C

These features contribute to efficient, reliable, and thermally resilient gate driving, allowing engineers to optimize MOSFET switching performance in demanding environments.

Common Use Cases for the MAX15024AATB+T

The robust current-driving capacity and fast switching performance position the MAX15024AATB+T as an optimal solution for numerous high-power, high-frequency applications. Engineered for use in:

Synchronous rectifier stages of isolated and non-isolated converters

High-efficiency, high-density switching power supplies

Power supply modules for telecommunications, automotive electronics (AEC-Q100 qualified), and industrial equipment

Its fast rise and fall time control capability enables precise management of switch transitions, minimizing losses and electromagnetic interference—essential for tightly regulated and performance-intensive systems.

Internal Design and Operational Principles

The MAX15024AATB+T employs a BiCMOS process and features distinct inverting and non-inverting logic-level input controls (IN+ and IN–), offering maximum design flexibility. The independent source and sink outputs facilitate separate tuning of rise and fall times for the external MOSFET, which is valuable in minimizing switching losses and optimizing electromagnetic compatibility.

A central architectural advantage is the integrated adjustable LDO regulator, which allows precise gate-drive voltage setting through an external resistor divider, or a fixed 10V setting by connecting the FB/SET pin to ground. The device is equipped with an undervoltage lockout (UVLO) circuit to ensure outputs are held low when supply voltage drops below the safe threshold, preventing unwanted MOSFET turn-on.

Shoot-through protection is built-in to eliminate cross-conduction currents within the IC, further ensuring safe operation and reducing unnecessary power dissipation. Thermal management is enhanced by a thermally-optimized exposed pad on the package underside, supporting operation at high current levels without device overheat.

Electrical Performance and Thermal Properties of the MAX15024AATB+T

The MAX15024AATB+T is specified for operation across a –40°C to +125°C temperature range. Electrical highlights include:

Output current capabilities: 8A peak sinking / 4A peak sourcing

Output logic compatibility: TTL/CMOS (with hysteresis)

Supply voltages: 4.5V to 28V (VCC, VDRV, VREG)

Quiescent current: typical 700µA

Propagation delay: 16 ns (typical)

Thermal performance:

- Junction-to-ambient thermal resistance (θJA): 41°C/W

- Junction-to-case thermal resistance (θJC): 9°C/W

Such robust electrical and thermal parameters enable reliable performance even in high ambient temperatures and high-density power layouts, while the small TDFN package supports space-constrained designs.

Guidelines for Designing and Integrating the MAX15024AATB+T

For optimal use of the MAX15024AATB+T, careful PCB layout and component selection are vital. Engineering recommendations include:

Minimize trace lengths and impedance between the driver and the external MOSFET gate to support fast edge rates and limit ringing

Employ sufficient local bypass capacitance (minimum 0.1µF ceramic as close as possible to the device’s VDRV and ground pins)

Use at least 10µF of bulk storage capacitance for applications with large capacitive loads or rapid switching

Reference input signals to the same ground as the driver to avoid ground shifts and potential mis-switching

Utilize the package's exposed thermal pad, soldered to a ground plane, for effective heat sinking in high-power or high-frequency scenarios

Engineers should also monitor total power dissipation, factoring in quiescent, capacitive, and output load-related components, ensuring operation within recommended maximums, especially under continuous or high-frequency use.

Possible Alternative or Substitute Models for the MAX15024AATB+T

Selecting an equivalent or alternative model depends on precise requirements such as gate-drive current, number of channels, logic-level compatibility, supply voltage, and package constraints. Within the same family, the MAX15025 offers a dual-channel solution (4A sink/2A source per channel) suitable for applications necessitating two driver outputs. For different logic input compatibility, the MAX15024B variant accepts CMOS logic-level inputs, while the MAX15024A (as described in this article) supports TTL inputs.

When considering alternatives from other manufacturers, engineers should focus on key parameters such as drive strength, propagation delay, supply voltage range, input logic standards, and thermal performance. Cross-reference tools or manufacturer selector guides can assist in identifying appropriate replacements compliant with the target application’s requirements.

Conclusion

The MAX15024AATB+T from Analog Devices Inc./Maxim Integrated stands out as a robust, high-speed gate driver solution, offering engineers precise control, high drive strength, and adjustable gate-drive voltages critical for demanding power electronics. By adhering to best practices in layout, bypassing, and thermal management, the device enables highly efficient and Reliable operation in next-generation power systems—making it an excellent choice for both new designs and as a drop-in replacement in existing high-performance power architectures.