Overview
The L78L08ACUTR is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. These regulators are designed to be highly robust, featuring internal current limiting and thermal shutdown, making them essentially indestructible. With adequate heat-sinking, they can deliver up to 100 mA of output current. The L78L series is intended for use in a wide range of applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. They can also be used with power pass elements to create high-current voltage regulators and as a replacement for Zener diode/resistor combinations, offering improvements in quiescent current and noise reduction.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current Max | 100 | mA |
| Output Voltage | 8 | V |
| Operating Temperature Range | 0 to 125 | °C |
| Input Voltage Range | Up to 35 V (depending on output voltage) | V |
| Dropout Voltage | 1.7 | V |
| Quiescent Current | 6 mA (at 25°C), 5.5 mA (at 125°C) | mA |
| Line Regulation | 150 mV (VI = 11 to 20 V, TJ = 25°C) | mV |
| Load Regulation | 40 mV (IO = 1 to 40 mA, TJ = 25°C) | mV |
| Package Type | SOT-89 |
Key Features
- Output current up to 100 mA
- Output voltage of 8 V with options for other voltages in the series (3.3, 5, 6, 9, 10, 12, 15, 18, 24 V)
- Internal current limiting and thermal shutdown for robust operation
- Short-circuit protection
- No external components required
- Available in ± 4% (A) or ± 8% (C) selection
- Low quiescent current and low noise
Applications
- Local or on-card voltage regulation to eliminate noise and distribution problems
- High-current voltage regulators when used with power pass elements
- Replacement for Zener diode/resistor combinations
- Industrial and commercial power supply systems
- Embedded systems requiring stable voltage regulation
Q & A
- What is the maximum output current of the L78L08ACUTR?
The maximum output current is up to 100 mA.
- What is the output voltage of the L78L08ACUTR?
The output voltage is 8 V.
- What are the operating temperature ranges for the L78L08ACUTR?
The operating temperature range is from 0 to 125°C.
- Does the L78L08ACUTR require external components?
No, the L78L08ACUTR does not require external components.
- What types of protection does the L78L08ACUTR have?
The L78L08ACUTR has internal current limiting, thermal shutdown, and short-circuit protection.
- What is the typical quiescent current of the L78L08ACUTR?
The typical quiescent current is 6 mA at 25°C and 5.5 mA at 125°C.
- What is the dropout voltage of the L78L08ACUTR?
The dropout voltage is approximately 1.7 V.
- In what package type is the L78L08ACUTR available?
The L78L08ACUTR is available in the SOT-89 package type.
- Can the L78L08ACUTR be used as a replacement for Zener diode/resistor combinations?
- What are some common applications of the L78L08ACUTR?
