myMectronic
myMectronic

A Premier B2B Part Search

Microchip Technology LR645N8G High-Voltage Linear Regulator

LR645 is a high-input voltage, low-output current linear regulator designed for off-line SMPS start-up circuits, low-power regulators, and noisy input regulation. Capable of accepting input voltages from 15 to 450V, it features adjustable output trimming from 8 to 12V and can deliver up to 3.0mA continuous current, with peak currents up to 30mA. Its low supply current and excellent line regulation make it suitable for compact, high-voltage applications requiring minimal power dissipation. Available in fixed and adjustable versions, it is ideal for power supply start-up and regulation in industrial and consumer electronics.

Authorized Distributors
Source:Newark
Part No:LR645N8-G
Stock:5442
Inv Date:06-03-2026
Price: Unit price: $0.855
Buy/RFQ:
Source:DigiKey
Part No:LR645N8-G
Stock:5452
Inv Date:06-03-2026
Price: Unit price: $0.83
Buy/RFQ:
Part No:LR645N8-G
Stock:10645
Inv Date:06-04-2026
Price: Unit price: $0.83
Buy/RFQ:
Part No:LR645N8-G
Stock:0
Inv Date:06-03-2026
Price: Unit price: $0.86
Buy/RFQ:
Part No:LR645N8-G
Stock:0
Inv Date:06-03-2026
Price: Unit price: $0.69
Buy/RFQ:
Part No:LR645N8-G
Stock:1797
Inv Date:06-04-2026
Price: N/A
Buy/RFQ:

Microchip Technology LR645N8G High-Voltage Linear Regulator Specifications:

  • Input Voltage Range: 15 to 450V
  • Output Voltage: 8 to 12V (adjustable), fixed versions available
  • Output Current: Up to 3.0mA continuous, peak 30mA
  • Supply Current: Typically very low, around 50-150 nA
  • Line Regulation: Typically 0.1mV/V
  • Ripple Rejection Ratio: Minimum 50dB at 120Hz
  • Output Voltage Trim Range: 8V to 12V
  • Temperature Range: -40°C to +125°C
  • Package Types: TO-92, TO-220, SOT-89, SOIC-8
  • Protection: Not galvanic isolated; adequate protection required from lethal voltages
  • Power Dissipation: Calculated based on input-output voltage difference and load; e.g., 400V input, 3mA load results in approx 1.23W dissipation

Buy the Microchip Series LR645 High-Input Voltage SMPS Start-up Regulator: LR645N8G

Get the Microchip LR645 linear regulator now to power your high-voltage applications efficiently. Featuring an input voltage range from 15 to 450V and adjustable output from 8 to 12V, this versatile regulator supports up to 3mA continuous current. Its low supply current and excellent line regulation make it perfect for off-line SMPS start-up and low-power regulation in industrial, consumer, or embedded systems. Easy to install in various packages including TO-92, TO-220, and SOIC-8, ensuring seamless integration into your designs.

Order your Microchip Series LR645N8G high-voltage regulator today and ensure reliable power regulation for your industrial or consumer electronics projects.

Frequently Asked Questions

Where can I buy Microchip Technology LR645N8G?

You can click on the BUY or RFQ button to purchase LR645N8G from an authorized Microchip Technology distributor.

How do I troubleshoot issues or seek technical support for part LR645N8G?

You can download the LR645N8G datasheet or visit the Microchip Technology website for support.

Who is the manufacturer of LR645N8G?

Microchip Technology

Microchip Technology Part List

Browse and search other Microchip Technology parts, locate datasheets and stock

Sponsored by