L78L09ACZTR STMicroelectronics Integrated Circuit (Other) In Stock
STMicroelectronics L78L09ACZTR is a fixed 9 V positive linear voltage regulator with 100 mA output current capability. It accepts input voltages from 11.5 V to 23 V with a 1.7 V typical dropout voltage. Available in a 3-pin TO-92 through-hole package, supplied in tape-and-reel format.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- L78L09ACZTR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L78L09ACZTR?
- Fixed 9 V regulated output voltage
- 100 mA maximum output current
- Input voltage range of 11.5 V to 23 V
- 1.7 V typical dropout voltage
- TO-92 through-hole package for easy prototyping
- RoHS compliant and REACH compliant
- Tape-and-reel packaging for automated assembly
What is L78L09ACZTR used for?
The L78L09ACZTR is commonly used to provide a stable 9 V supply rail for op-amps, audio preamplifiers, and analog signal conditioning circuits in consumer electronics and hobby projects. Its 3-pin TO-92 package allows straightforward through-hole mounting, making it popular for educational electronics kits and low-volume production runs. It is also suitable for powering microcontroller peripherals and relay driver circuits that require a regulated 9 V supply.
What are the specifications of L78L09ACZTR?
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 10Weeks |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 1.7V |
| Input Voltage Absolute-Max | 30V |
| Input Voltage-Max | 23V |
| Input Voltage-Min | 11.5V |
| JESD-30 Code | O-XBCY-T3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.225% |
| Load Regulation-Max | 0.08% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 0.07A |
| Output Voltage1-Max | 9.45V |
| Output Voltage1-Min | 8.55V |
| Output Voltage1-Nom | 9V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | SIP3,.1,50 |
| Package Shape | ROUND |
| Package Style | CYLINDRICAL |
| Packing Method | TAPE AND REEL |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Subcategory | Other Regulators |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 1.27mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the L78L09ACZTR datasheet?
L78L09ACZTR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L78L09ACZTR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range is required to ensure the L78L09ACZTR maintains its 9 V regulated output?
The L78L09ACZTR requires an input voltage between 11.5 V minimum and 23 V maximum to maintain a stable 9 V output. The 1.7 V typical dropout voltage means at least 10.7 V input is needed, but the specified minimum operating input is 11.5 V to guarantee full regulation accuracy.
How does the 100 mA output current limit of the L78L09ACZTR compare when powering analog circuits?
With a maximum output current of 100 mA, the L78L09ACZTR can power multiple op-amps, small relay coils, or sensor modules simultaneously. It is not intended for high-current loads above 100 mA; for those cases, a higher-current 78xx series regulator such as the 78M09 at 500 mA or L7809 at 1 A would be more appropriate.
Why is the TO-92 package of the L78L09ACZTR preferred in prototype and low-volume production designs?
The TO-92 package with 3 pins is a classic through-hole format that requires no soldering expertise beyond basic iron skills, making it ideal for breadboard prototyping and hand-soldered low-volume boards. Its lead spacing fits standard 0.1 inch grid perfboard, and the tape-and-reel packaging option supports automated insertion for higher-volume runs.
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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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