Overview
The L78M09ABDT-TR is a three-terminal positive linear voltage regulator produced by STMicroelectronics. It is part of the L78M series, which offers a range of fixed output voltages, making it versatile for various applications. This regulator is available in several package types, including TO-220 and DPAK, and is designed to provide local on-card regulation, eliminating the need for single-point regulation and associated distribution problems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 8.82 - 9.18 | V |
| Output Current | Up to 500 mA | mA |
| Input Voltage (for VO = 9V) | Up to 35 V | V |
| Quiescent Current | 6 mA (typical) | mA |
| Line Regulation | 100 mV (VI = 11.5 to 25 V, IO = 200 mA) | mV |
| Load Regulation | 100 mV (IO = 5 to 500 mA) | mV |
| Dropout Voltage | 2 V (typical) | V |
| Short Circuit Current | 250 mA (typical) | mA |
| Operating Junction Temperature | -40 to 125 °C | °C |
| Thermal Resistance (Junction to Case) | 5 °C/W (TO-220), 8 °C/W (DPAK) | °C/W |
Key Features
- Fixed Output Voltage: The L78M09ABDT-TR provides a fixed output voltage of 9V.
- High Current Capability: It can deliver up to 500 mA of output current.
- Thermal Overload Protection: The regulator includes internal thermal shutdown to protect against overheating.
- Short Circuit Protection: It features short circuit current limiting and safe area protection.
- Output Transition SOA Protection: Ensures safe operation during output transitions.
- Precision Output Voltage: The output voltage has a tolerance of ±2%.
- Extended Temperature Range: Operates over a temperature range of -40 to 125 °C.
Applications
The L78M09ABDT-TR is suitable for a wide range of applications, including local on-card regulation and power distribution systems. It is particularly useful in scenarios where a stable and reliable voltage supply is necessary, such as in industrial control systems, medical devices, and consumer electronics.
Q & A
- What is the output voltage of the L78M09ABDT-TR? The output voltage is 9V with a tolerance of ±2%.
- What is the maximum output current of the L78M09ABDT-TR? The maximum output current is up to 500 mA.
- What are the package options for the L78M09ABDT-TR? It is available in TO-220 and DPAK packages.
- Does the L78M09ABDT-TR have thermal protection? Yes, it includes internal thermal shutdown to protect against overheating.
- What is the operating temperature range of the L78M09ABDT-TR? The operating temperature range is -40 to 125 °C.
- Is the L78M09ABDT-TR protected against short circuits? Yes, it features short circuit current limiting and safe area protection.
- What is the dropout voltage of the L78M09ABDT-TR? The dropout voltage is typically 2 V.
- Can the L78M09ABDT-TR be used for adjustable voltage regulation? Although primarily designed as a fixed voltage regulator, it can be used with external components to obtain adjustable voltage and currents.
- What is the quiescent current of the L78M09ABDT-TR? The quiescent current is typically 6 mA.
- What are some common applications of the L78M09ABDT-TR? It is commonly used in local on-card regulation, power distribution systems, industrial control systems, medical devices, and consumer electronics.
