Overview
The L78L12ACUTR 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 | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25 °C | 11.1 | 12 | 12.9 | V |
| Output Voltage (VO) | IO = 1 to 40 mA, VI = 14.5 to 27 V | 10.8 | 12 | 13.2 | V |
| Line Regulation (∆VO) | VI = 14.5 to 27 V, TJ = 25 °C | - | - | 250 | mV |
| Load Regulation (∆VO) | IO = 1 to 100 mA, TJ = 25 °C | - | - | 100 | mV |
| Quiescent Current (Id) | TJ = 25 °C | - | 6.5 | - | mA |
| Dropout Voltage (Vd) | - | - | - | 1.7 | V |
| Operating Temperature | - | 0 | - | 125 | °C |
Key Features
- Output current up to 100 mA
- Output voltages of 3.3, 5, 6, 8, 9, 10, 12, 15, 18, 24 V
- Thermal overload protection and short-circuit protection
- No external components required
- Available in either ± 4% (A) or ± 8% (C) selection
- Internal current limiting and thermal shutdown for robust operation
- Low quiescent current and low noise
Applications
- Local or on-card regulation to eliminate noise and distribution problems
- Use with power pass elements to create high-current voltage regulators
- Replacement for Zener diode/resistor combinations
- Industrial and commercial power supply systems
- Consumer electronics requiring stable voltage regulation
Q & A
- What is the maximum output current of the L78L12ACUTR?
The maximum output current is up to 100 mA.
- What are the available output voltages for the L78L series?
The output voltages available are 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V.
- Does the L78L12ACUTR require external components for operation?
No, the L78L12ACUTR does not require any external components for operation.
- What is the operating temperature range for the L78L12ACUTR?
The operating temperature range is from 0 to 125 °C.
- What types of protection does the L78L12ACUTR have?
The L78L12ACUTR has thermal overload protection and short-circuit protection.
- Can the L78L12ACUTR be used as a replacement for Zener diode/resistor combinations?
- What are the typical applications of the L78L12ACUTR?
The L78L12ACUTR is typically used in local or on-card regulation, high-current voltage regulators, and in industrial and consumer electronics requiring stable voltage regulation.
- What is the quiescent current of the L78L12ACUTR at 25 °C?
The quiescent current at 25 °C is typically 6.5 mA.
- What is the dropout voltage of the L78L12ACUTR?
The dropout voltage is 1.7 V.
- What are the available packages for the L78L12ACUTR?
The L78L12ACUTR is available in SOT-89 package.
