Overview
The L78M08ABDT-1 is a linear voltage regulator IC produced by STMicroelectronics. It is part of the L78M series, which offers a range of three-terminal positive regulators. This specific model is designed to provide a fixed output voltage of 8 volts and can deliver up to 500 mA of output current. The L78M08ABDT-1 is packaged in a DPAK (TO-252) package, making it suitable for a variety of applications where local on-card regulation is required.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 7.84 | 8 | 8.16 | V |
| Output Current (IO) | 500 | mA | ||
| Input Voltage (VI) | 35 (for VO = 5 to 18 V), 40 (for VO = 20, 24 V) | V | ||
| Line Regulation (∆VO) | 100 mV | |||
| Load Regulation (∆VO) | 160 mV | |||
| Quiescent Current (Id) | 6 | mA | ||
| Dropout Voltage (Vd) | 2 | V | ||
| Short Circuit Current (Isc) | 250 | mA | ||
| Operating Junction Temperature (TJ) | -40 | 125 | °C | |
| Thermal Resistance Junction-Case (RthJC) | 8 | °C/W | ||
| Thermal Resistance Junction-Ambient (RthJA) | 100 | °C/W |
Key Features
- Output Current: Up to 500 mA.
- Output Voltage: Fixed at 8 volts with a tolerance of 2% for the AB version.
- Protection Features: Internal current limiting, thermal shutdown, and safe area protection.
- Thermal Performance: Available in DPAK package with thermal resistance junction-case (RthJC) of 8 °C/W and thermal resistance junction-ambient (RthJA) of 100 °C/W.
- Operating Temperature Range: -40 to 125 °C for the AB version.
- Line and Load Regulation: Excellent line and load regulation characteristics.
- Dropout Voltage: Low dropout voltage of 2 V.
- Short Circuit Protection: Short circuit peak current protection.
Applications
The L78M08ABDT-1 is versatile and can be used in a wide range of applications, including:
- Local On-Card Regulation: Eliminates distribution problems associated with single point regulation.
- Industrial Control Systems: Suitable for use in industrial environments due to its robust protection features.
- Consumer Electronics: Can be used in various consumer electronic devices requiring stable voltage regulation.
- Automotive Systems: Applicable in automotive systems where reliable voltage regulation is crucial.
- Medical Devices: Used in medical devices that require precise voltage regulation.
Q & A
- What is the output voltage of the L78M08ABDT-1?
The output voltage is fixed at 8 volts.
- What is the maximum output current of the L78M08ABDT-1?
The maximum output current is 500 mA.
- What are the key protection features of the L78M08ABDT-1?
Internal current limiting, thermal shutdown, and safe area protection.
- What is the operating temperature range for the L78M08ABDT-1?
The operating temperature range is -40 to 125 °C for the AB version.
- What is the dropout voltage of the L78M08ABDT-1?
The dropout voltage is 2 V.
- Does the L78M08ABDT-1 have short circuit protection?
- What is the thermal resistance junction-case (RthJC) for the DPAK package?
The thermal resistance junction-case (RthJC) is 8 °C/W.
- What is the thermal resistance junction-ambient (RthJA) for the DPAK package?
The thermal resistance junction-ambient (RthJA) is 100 °C/W.
- Can the L78M08ABDT-1 be used in automotive systems?
- What are some common applications of the L78M08ABDT-1?
Local on-card regulation, industrial control systems, consumer electronics, automotive systems, and medical devices.
