MAX8794ETB+TG24

Overview

The MAX8794ETB+TG24 is a low-voltage DDR linear regulator manufactured by Analog Devices Inc./Maxim Integrated. It sources and sinks up to 3A peak current using internal n-channel MOSFETs, delivering an accurate output voltage ranging from 0.5V to 1.5V. The device operates from a power input between 1.1V and 3.6V and utilizes a separate 3.3V bias supply for control circuitry and MOSFET driving. It features ±15mV maximum load-regulation error, thermal-fault protection, and a power-good window comparator with a typical 2ms delay. The component is housed in a small, low-profile 10-pin, 3mm x 3mm TDFN package.

Feature Summary

• Integrates internal n-channel MOSFETs capable of sourcing and sinking high peak currents for efficient power delivery.
• Provides precise output voltage regulation with minimal load-regulation error for sensitive digital loads.
• Includes comprehensive protection mechanisms such as current limiting, thermal-fault protection, and internal soft-start.
• Generates a power-good signal to indicate stable output regulation during startup and normal operation.

Applications

• Active-DDR termination bus powering requiring tracking input reference
• Low-power chipset voltage regulation
• Graphics processor core dynamic voltage adjustment

Procurement Notes

Verify the specific suffix +TG24 against official manufacturer documentation to confirm tape-and-reel packaging and exact lot traceability requirements. Ensure compatibility with the required 3.3V bias supply voltage and validate that the TDFN-10 footprint matches the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring high transient response and precise voltage tracking for DDR memory or similar logic cores. The integrated MOSFET structure eliminates the need for external pass transistors, simplifying the bill of materials. Consider the separate bias supply requirement and ensure the available input voltage range aligns with the system's primary power rail capabilities.

Part Context

This part belongs to the Maxim Integrated line of power management solutions, specifically designed for low-voltage digital applications. It addresses the need for fast load-transient response and high accuracy in space-constrained environments. The TDFN package allows for compact board layouts while maintaining thermal performance suitable for portable and embedded electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official distributor databases or manufacturer cross-reference tools for potential alternatives if this specific revision is unavailable.

FAQ

How does the MAX8794 handle startup surge currents?

The device incorporates an internal soft-start feature that limits the input surge current during the startup phase to prevent instability in the power supply.

What is the function of the PGOOD signal?

The Power-Good (PGOOD) signal indicates that the output voltage is within the regulated window. It remains low until the output stabilizes for approximately 2ms after startup.