LM317LBDR2G: The Ultimate Adjustable Linear Voltage Regulator by onsemi

The LM317LBDR2G from onsemi stands as a pinnacle of precision in linear voltage regulation technology. This comprehensive guide explores every aspect of this high-performance IC, helping engineers and designers understand why it's become a go-to solution for power management across industries.

In-Depth Look at the LM317LBDR2G

As part of onsemi's renowned power management IC portfolio, the LM317LBDR2G represents the perfect balance of flexibility and reliability in voltage regulation. This surface-mount device comes in a compact 8-SOIC package (3.90mm width), making it ideal for space-constrained applications while delivering exceptional performance.

Technical Specifications Breakdown

Voltage Characteristics

• Wide Input Range: 4V to 40V operation
• Adjustable Output: 1.2V to 37V range
• Precision Reference: 1.2V bandgap reference voltage

Current Capabilities

• Output Current: 100mA continuous
• Quiescent Current: Typically 5mA (10mA max)
• Load Regulation: 0.3% typical

Performance Metrics

• PSRR: 80dB at 120Hz (exceptional noise rejection)
• Line Regulation: 0.02%/V typical
• Temperature Stability: 0.7mV/ C output change

Advanced Features

The LM317LBDR2G incorporates several innovative features that set it apart:

Thermal Management

• 125 C maximum junction temperature
• Thermal overload protection
• SOIC-8 package with 65 C/W thermal resistance

Protection Circuits

• Current limiting protection
• Thermal shutdown
• Safe operating area protection

Application-Specific Design Considerations

For Portable Electronics

• Ideal for battery-powered devices
• Low dropout operation extends battery life
• Minimal external components required

Industrial Implementations

• Withstands -40 C to 125 C temperature range
• Excellent line and load regulation
• Robust protection for harsh environments

Design Implementation Guide

To maximize the LM317LBDR2G's performance:

Basic Configuration

• Two-resistor voltage divider sets output
• 10 F minimum output capacitor recommended
• 0.1 F bypass capacitor improves transient response

Thermal Considerations

• Calculate power dissipation: P_D = (V_IN - V_OUT) I_LOAD
• Use thermal vias for SOIC packages
• Consider heatsinking for high current applications

Comparative Analysis

When compared to similar regulators, the LM317LBDR2G offers:

• Better PSRR than most competitors
• More precise output voltage setting
• Superior thermal performance in SOIC package

Purchasing Information

The LM317LBDR2G is available through authorized distributors with:

• Standard packaging: 2500 units per reel
• Lead-free and RoHS compliant
• Standard industry pricing

Conclusion

The LM317LBDR2G from onsemi delivers unmatched performance in adjustable voltage regulation. Its combination of precision, protection features, and thermal performance makes it the ideal choice for demanding applications across consumer, industrial, and communication markets. Engineers can rely on its stable operation and flexible design to create power solutions that stand the test of time.

For your next design requiring precise voltage regulation, choose the proven performance of the LM317LBDR2G. Its technical superiority and onsemi's quality assurance make it the smart choice for power management solutions.