Overview
The L78L09ACZ-TR is a three-terminal positive voltage regulator from STMicroelectronics. It belongs to the L78L series, which is known for its robust design, incorporating internal current limiting and thermal shutdown, making these regulators essentially indestructible. With adequate heat-sinking, these regulators can deliver up to 100 mA of output current. They are designed for use as fixed voltage regulators in various applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. Additionally, they can be used with power pass elements to create high-current voltage regulators, offering improvements over traditional Zener diode/resistor combinations with lower quiescent current and noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Min | 0.0 | °C |
| Operating Temperature Max | 125.0 | °C |
| Output Voltage | 8.64 - 9.36 | V |
| Output Current | Up to 100 | mA |
| Input Voltage Range | 11.5 to 23 V | V |
| Quiescent Current | 6 mA (at 25°C), 5.5 mA (at 125°C) | mA |
| Dropout Voltage | 1.7 | V |
| Line Regulation | 225 mV (VI = 11.5 to 23 V, TJ = 25°C) | mV |
| Load Regulation | 80 mV (IO = 1 to 100 mA, TJ = 25°C) | mV |
| Output Noise Voltage | 70 µV (B = 10 Hz to 100 kHz, TJ = 25°C) | µV |
| Supply Voltage Rejection | 37 to 44 dB (VI = 12 to 23 V, f = 120 Hz, IO = 40 mA, TJ = 25°C) | dB |
| Packing Type | Tape And Reel | |
| RoHS Compliant | Ecopack2 | |
| Package Name | TO-92 |
Key Features
- Output current up to 100 mA
- Output voltage of 9 V with ±4% tolerance
- Internal current limiting and thermal shutdown for robust operation
- No external components required
- Short-circuit protection
- Low quiescent current and noise
- Available in TO-92 package
- RoHS compliant (Ecopack2)
Applications
The L78L09ACZ-TR is suitable for a wide range of applications, including local or on-card voltage regulation to eliminate noise and distribution problems. It can be used in industrial, automotive, and consumer electronics where stable and reliable voltage regulation is necessary. Additionally, it can be combined with power pass elements to create high-current voltage regulators, making it versatile for various power management needs.
Q & A
- What is the output voltage of the L78L09ACZ-TR? The output voltage of the L78L09ACZ-TR is 9 V with a tolerance of ±4%.
- What is the maximum output current of the L78L09ACZ-TR? The maximum output current is up to 100 mA.
- What are the operating temperature ranges for the L78L09ACZ-TR? The operating temperature range is from 0°C to 125°C.
- Does the L78L09ACZ-TR require external components? No, the L78L09ACZ-TR does not require external components for operation.
- What type of protection does the L78L09ACZ-TR have? It has internal current limiting and thermal shutdown, as well as short-circuit protection.
- What is the quiescent current of the L78L09ACZ-TR? The quiescent current is 6 mA at 25°C and 5.5 mA at 125°C.
- What is the dropout voltage of the L78L09ACZ-TR? The dropout voltage is 1.7 V.
- Is the L78L09ACZ-TR RoHS compliant? Yes, it is RoHS compliant (Ecopack2).
- What package type is the L78L09ACZ-TR available in? It is available in the TO-92 package.
- What are some common applications for the L78L09ACZ-TR? It is commonly used in industrial, automotive, and consumer electronics for local or on-card voltage regulation and high-current voltage regulator applications.
