MAX638ACSA+T

Voltage Regulators - DC DC Switching Regulators Overview

The MAX638ACSA+T is a step-down switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated. It features a positive output configuration with adjustable or fixed voltage options, specifically 1.31V or 5V. The device operates within an input voltage range of 2.2V to 16.5V and delivers a maximum output voltage of 16.5V. It utilizes a buck topology with a fixed switching frequency of 65kHz and lacks synchronous rectification. The component is housed in an 8-SOIC package (0.154 inch/3.90mm wide) designed for surface mount installation. It supports an operating temperature range of 0°C to +70°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a non-synchronous buck converter topology for efficient step-down voltage regulation.
• Provides flexible output configurations supporting both adjustable and fixed voltage settings.
• Features a compact 8-SOIC surface-mount package suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Applications

• General-purpose DC-DC conversion in embedded systems
• Power supply stages for microprocessor-based applications
• Battery-powered devices requiring regulated voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix designation against official manufacturer documentation, as standard listings may indicate the MAX638ACSA variant. Confirm RoHS compliance status, as some sources classify this specific part number as non-compliant. Check current lifecycle status, as the base product may be discontinued or subject to limited availability. Ensure the supplier provides valid traceability for the Analog Devices/Maxim Integrated brand.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, cost-effective buck regulator is required for inputs up to 16.5V. Consider the 65kHz switching frequency for EMI constraints and the absence of synchronous rectification for efficiency expectations. Verify that the 0°C to +70°C industrial temperature range meets application requirements. Ensure the 8-SOIC footprint aligns with PCB layout capabilities.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the Maxim Integrated power management portfolio, now under Analog Devices. It represents a legacy switching regulator solution designed for general-purpose voltage regulation tasks. The MAX638 series focuses on providing reliable step-down conversion without complex control interfaces, serving as a foundational PMIC component for various electronic systems prior to more advanced integrated solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided source data. Consult Analog Devices official documentation for recommended upgrades or pin-compatible alternatives if this component is discontinued.