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
Key Features
- 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
Applications
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.
Specifications
| 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) |
Alternate & Equivalent Parts
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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