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STMICROELECTRONICS L78S09CV Voltage Regulator

The L78S series of three-terminal positive voltage regulators in TO-220 package offer fixed output voltages, including 5V, 9V, 12V, 15V, 18V, 24V, and others, with output currents up to 2A. These regulators feature internal current limiting, thermal shut-down, and safe area protection, ensuring durability. Suitable for local on-card regulation, they eliminate distribution issues associated with single point regulation. Designed for various applications, they can be used with external components to obtain adjustable voltages and currents when necessary, providing reliable, robust power regulation solutions.

Authorized Distributors
Source:Newark
Part No:L78S09CV
Stock:2528
Inv Date:06-11-2026
Price: Unit price: $0.928
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Source:DigiKey
Part No:L78S09CV
Stock:1560
Inv Date:06-11-2026
Price: Unit price: $0.82
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Part No:L78S09CV
Stock:860
Inv Date:06-12-2026
Price: Unit price: $0.82
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Part No:L78S09CV
Stock:0
Inv Date:06-11-2026
Price: Unit price: $0.74
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STMICROELECTRONICS L78S09CV Voltage Regulator Specifications:

  • Output currents up to 2 A
  • Output voltages: 5V, 7.5V, 9V, 10V, 12V, 15V, 18V, 24V
  • Thermal protection, short circuit protection, SOA protection
  • Package: TO-220
  • Storage temperature: -65°C to 150°C
  • Operating junction temperature: 0°C to 150°C
  • Line regulation: typically 50-130 mV depending on voltage
  • Load regulation: approximately 80-150 mV
  • Quiescent current: approximately 8 mA
  • Output noise voltage: 40-110 μV (10 Hz - 100 kHz)
  • Output resistance: 16-28 mΩ
  • Maximum input voltage: up to 40V
  • Power dissipation: internally limited

Buy the STMicroelectronics Series L78S Voltage Regulator: L78S09CV

Purchase the STMicroelectronics L78S09CV voltage regulator online and ensure your electronic projects have reliable and consistent power sources. Designed with internal current limiting, thermal protection, and built-in safety features, this regulator delivers stable output voltages up to 9V at currents up to 2A. Its TO-220 package is suitable for a variety of applications where local regulation is needed. Easy to install and compatible with external components for adjustable voltages, it provides long-lasting performance, making it an essential component for engineers and hobbyists alike.

Get STMicroelectronics L78S09CV today—built for precision, durability, and reliable power regulation in demanding electronic circuits.

Frequently Asked Questions

Where can I buy STMICROELECTRONICS L78S09CV?

You can click on the BUY or RFQ button to purchase L78S09CV from an authorized STMICROELECTRONICS distributor.

How do I troubleshoot issues or seek technical support for part L78S09CV?

You can download the L78S09CV datasheet or visit the STMICROELECTRONICS website for support.

Who is the manufacturer of L78S09CV?

STMICROELECTRONICS

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