MAX667ESA: High-Performance Linear Positive Adjustable Voltage Regulator

The MAX667ESA from Analog Devices Inc./Maxim Integrated is a precision linear voltage regulator delivering exceptional performance in power management applications. This comprehensive guide explores its technical specifications, key advantages, and diverse use cases to help engineers optimize their designs.

In-Depth Technical Specifications

Voltage Regulation Capabilities

This adjustable regulator offers exceptional flexibility with:

• Wide output range: 1.3V to 16V adjustable output
• High input tolerance: Accepts up to 16.5V input voltage
• Precision regulation: 2% output voltage accuracy

Efficiency Characteristics

The MAX667ESA excels in power efficiency:

• Ultra-low dropout: Just 350mV at 200mA load current
• Minimal quiescent current: Only 35 A in standby
• Optimized power dissipation: 8-SOIC package with thermal considerations

Package and Environmental Specifications

Physical and operational parameters include:

• Compact footprint: 8-pin SOIC package (3.90mm width)
• Robust temperature range: -40 C to +85 C operation
• Surface-mount design: Optimized for automated PCB assembly

Advanced Features and Benefits

Intelligent Control Functions

The MAX667ESA incorporates several sophisticated control features:

• Dropout detection: Warns when input voltage approaches regulation limits
• Enable pin: Allows for power management control
• Low battery detection: Ideal for portable applications

Reliability Enhancements

Designers benefit from:

• Stable operation: Excellent line and load regulation
• Built-in protection: Implicit safeguards against common failure modes
• Proven longevity: Despite obsolete status, known for reliable performance

Comprehensive Application Guide

Primary Use Cases

The MAX667ESA excels in:

• Battery-powered systems: Portable medical devices, handheld instruments
• Industrial controls: Sensor interfaces, PLC components
• Communication equipment: RF modules, base station peripherals
• Consumer electronics: Smart home devices, wearable technology

Design Considerations

For optimal performance:

• Maintain input voltage at least 0.35V above required output
• Implement proper decoupling (0.1 F ceramic + 1 F tantalum recommended)
• Consider thermal management for high current applications
• Utilize enable pin for power sequencing in complex systems

Comparative Advantages

When evaluating the MAX667ESA against competing regulators:

• Superior dropout performance compared to standard LDOs
• Lower quiescent current than many industrial-grade regulators
• Greater adjustment range versus fixed-output alternatives
• More control features than basic regulator ICs

Obsolete Status Considerations

While marked obsolete:

• Still available through authorized distributors
• Recommended for new designs with proper inventory planning
• Alternative suggestions available for high-volume production
• Remains popular for maintenance and repair applications

Purchasing and Support

Our platform offers:

• Guaranteed authentic MAX667ESA components
• Competitive pricing for various quantities
• Technical support for design integration
• Alternative component recommendations when needed

Conclusion

The MAX667ESA represents an exceptional balance of performance, efficiency, and flexibility in voltage regulation. Its combination of low dropout, adjustable output, and intelligent features make it particularly valuable for demanding applications where power efficiency and precise regulation are critical. While newer alternatives exist, the MAX667ESA continues to be a preferred choice for many engineers requiring proven, reliable voltage regulation in compact form factors.

For designers working on battery-powered systems, industrial controls, or precision electronics, understanding the capabilities and proper implementation of the MAX667ESA can lead to optimized power system designs with enhanced reliability and performance.