L7809ACV STMicroelectronics Integrated Circuit (Transistor Outline, Vertical) In Stock
STMicroelectronics L7809ACV is a fixed +9 V linear voltage regulator accepting up to 35 V input with 2 V typical dropout in a TO-220 through-hole package. It delivers up to 1.5 A output current with internal thermal and short-circuit protection. Available in stock worldwide with fast delivery.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- L7809ACV Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L7809ACV?
- Fixed +9 V regulated output with 0.09% line regulation and up to 35 V absolute maximum input voltage
- Internal thermal shutdown and short-circuit protection eliminate the need for external protection circuitry
- TO-220 through-hole package with up to 1.5 A output current for robust power supply designs
What is L7809ACV used for?
The L7809ACV is ideal for generating a stable 9 V rail in industrial power supplies, embedded system boards, and consumer electronics requiring a regulated supply from a higher-voltage input such as a 12 V or 24 V bus. Its internal protection features and TO-220 package suit medium-current applications like motor driver pre-regulators, audio preamplifiers, and sensor supply rails. The wide input range of 10.6 V to 35 V makes it versatile across automotive, benchtop, and wall-adapter powered designs.
What are the specifications of L7809ACV?
| Date Of Intro | 1980-01-04 |
| YTEOL | 6.01 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2V |
| Input Voltage Absolute-Max | 35V |
| Input Voltage-Max | 22V |
| Input Voltage-Min | 10.6V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.09% |
| Load Regulation-Max | 0.1% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 9.18V |
| Output Voltage1-Min | 8.65V |
| Output Voltage1-Nom | 9V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | MATTE TIN |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2% |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the L7809ACV datasheet?
L7809ACV Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L7809ACV?
Compatible alternatives and drop-in replacements for L7809ACV:
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Frequently Asked Questions
What input voltage range does the L7809ACV support and what is its dropout voltage?
The L7809ACV accepts an input voltage from 10.6 V minimum to 35 V absolute maximum, with a nominal dropout voltage of 2 V. This means at least an 11 V input is needed to maintain a stable 9 V output, making it compatible with 12 V and 24 V supply rails common in industrial and automotive systems.
How much output current can the L7809ACV supply in a 9 V regulator application?
The L7809ACV provides up to 1.5 A of continuous output current at 9 V, with internal thermal shutdown and short-circuit protection ensuring safe operation under overload conditions. This current capacity suits medium-load applications such as microcontroller boards, sensor arrays, and audio pre-amplifier circuits powered from a 12 V to 24 V bus.
Which board designs benefit most from the L7809ACV compared to a switching regulator?
The L7809ACV is preferred in noise-sensitive analog or RF circuits where a switching regulator's switching artifacts would degrade performance. Applications like audio preamplifiers, precision sensor boards, and RF front-ends benefit from its clean 9 V output with 0.09% line regulation, accepting the linear regulator's power dissipation trade-off in exchange for very low output noise.
What external components are required to build a complete 9 V regulated supply with the L7809ACV?
A minimal L7809ACV circuit requires only a 0.33 µF input bypass capacitor and a 0.1 µF output capacitor plus the L7809ACV itself, since internal thermal and short-circuit protection are built in. This 3-component BOM makes it one of the simplest 9 V, 1.5 A regulator solutions for cost-sensitive or space-constrained power supply stages.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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