MCP1790-5002E/DB: High-Performance 5V 70mA Linear Voltage Regulator IC by Microchip Technology

The MCP1790-5002E/DB is a premium-grade linear voltage regulator IC from Microchip Technology, engineered to deliver ultra-stable 5V power with exceptional efficiency. As part of the PMIC - Linear Voltage Regulators family, this IC is perfect for applications demanding precise voltage control with minimal power loss. Its compact SOT-223-3 package and robust performance make it a top choice for engineers worldwide.

In-Depth Product Analysis

Manufacturer Credentials

• Manufacturer: Microchip Technology, a global leader in semiconductor solutions
• Quality Certification: RoHS-compliant, AEC-Q100 qualified for automotive use

Technical Specifications

Parameter	Value
Output Voltage	Fixed 5V 2% accuracy
Maximum Input Voltage	30V (absolute max 35V)
Output Current	70mA continuous
Dropout Voltage	1.3V typical @ 70mA
Quiescent Current	130 A (typ), 210 A (max)
Operating Temp Range	-40 C to +125 C

Advanced Features

Superior Power Management

• Ultra-Low Dropout: Maintains regulation with just 1.3V headroom
• High PSRR: 90dB at 100Hz, 75dB at 1kHz for exceptional noise rejection
• Thermal Protection: Automatic shutdown at 150 C (typ)

Enhanced Reliability

• Short-Circuit Protection: Current limiting safeguards the IC
• Reverse Polarity Protection: Withstands -20V at input
• Long-Term Stability: 1% output voltage variation over lifetime

Package Information

The device comes in a SOT-223-3 package (TO-261-4 variant) with:

• Compact footprint: 6.5mm 7mm 1.8mm
• Copper leadframe for superior thermal performance
• Moisture Sensitivity Level (MSL): 1 (unlimited floor life)

Comprehensive Applications

Industrial Systems

• PLC I/O modules
• Sensor power supplies
• HMI controllers

Automotive Electronics

• ECU peripheral circuits
• Infotainment systems
• Telematics control units

Consumer Products

• Smart home devices
• Wearable technology
• Portable medical instruments

Telecommunications

• Router/switch power management
• Base station subsystems
• RF module voltage regulation

Design Considerations

PCB Layout Guidelines

• Use 1oz copper or thicker for thermal vias
• Place input capacitor within 5mm of VIN pin
• Minimize trace length to output capacitor

Thermal Management

• Maximum junction temperature: 150 C
• Thermal resistance: 62 C/W (SOT-223)
• For full 70mA operation at high ambient temps, use 1.5in copper area

Comparative Advantages

When benchmarked against similar regulators (e.g., LM2936, TPS709), the MCP1790-5002E/DB offers:

• 30% lower dropout voltage
• 50% better PSRR performance
• Wider operating temperature range (-40 C to +125 C vs. -40 C to +85 C)

Purchasing Information

Available through authorized distributors:

• Standard packaging: Tape & Reel (3,000 units)
• Lead time: Typically stock to 8 weeks
• Pricing: Competitive volume discounts available

Conclusion

The MCP1790-5002E/DB represents Microchip Technology's commitment to power management excellence. With its industry-leading specifications, robust protection features, and versatile applications, this linear regulator is engineered to meet the most demanding design challenges. Its combination of high voltage tolerance, ultra-low quiescent current, and exceptional thermal performance makes it particularly valuable for battery-operated and space-constrained applications.

For engineers seeking a reliable, high-performance 5V regulator with Microchip's quality assurance, the MCP1790-5002E/DB delivers outstanding value. Visit our technical resource center for reference designs, SPICE models, and application notes to accelerate your design process.