Overview
The L78M15ABDT-TR is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78MxxA series. This regulator is designed to provide a stable output voltage of 15V and is available in the TO-220 package. It is suitable for a wide range of applications requiring local on-card regulation, eliminating the issues associated with single-point regulation. The device features internal current limiting, thermal shutdown, and safe area protection, making it highly reliable and robust.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 14.7 - 15.3 | V |
| Output Current | Up to 0.5 A | A |
| Input Voltage | Up to 35 V (for VO = 5 to 18 V), 40 V (for VO = 20, 24 V) | V |
| Line Regulation | 100 mV (VI = 17.5 to 30 V, IO = 200 mA) | mV |
| Load Regulation | 300 mV (IO = 5 to 500 mA) | mV |
| Quiescent Current | 6 mA | mA |
| Dropout Voltage | 2 V | V |
| Short Circuit Current | 250 mA | mA |
| Operating Junction Temperature | -40 to 125 °C | °C |
| Thermal Resistance Junction-Case | 5 °C/W | °C/W |
| Thermal Resistance Junction-Ambient | 50 °C/W | °C/W |
Key Features
- Output current up to 0.5 A
- Output voltage tolerance of ±2%
- Thermal overload protection
- Short circuit protection
- Output transition SOA protection
- Guaranteed in extended temperature range (-40 to 125 °C)
- Internal current limiting and safe area protection
- Low dropout voltage of 2 V
- High supply voltage rejection (up to 56 dB)
- Low output noise voltage (52 µV)
Applications
The L78M15ABDT-TR is versatile and can be used in various applications requiring stable voltage regulation. These include:
- Local on-card regulation in electronic devices
- Power supplies for industrial and consumer electronics
- Automotive systems requiring robust voltage regulation
- Medical devices needing stable and reliable power
- Telecommunication equipment and networking devices
Q & A
- What is the output voltage of the L78M15ABDT-TR?
The output voltage is 15 V with a tolerance of ±2%.
- What is the maximum output current of the L78M15ABDT-TR?
The maximum output current is up to 0.5 A.
- What are the key protection features of the L78M15ABDT-TR?
The device features thermal overload protection, short circuit protection, and output transition SOA protection.
- What is the operating junction temperature range of the L78M15ABDT-TR?
The operating junction temperature range is -40 to 125 °C.
- What is the dropout voltage of the L78M15ABDT-TR?
The dropout voltage is 2 V.
- How does the L78M15ABDT-TR handle short circuit conditions?
The device has internal short circuit protection that limits the maximum current it will pass.
- What is the thermal resistance junction-case of the L78M15ABDT-TR in TO-220 package?
The thermal resistance junction-case is 5 °C/W.
- Can the L78M15ABDT-TR be used in automotive applications?
- What is the quiescent current of the L78M15ABDT-TR?
The quiescent current is 6 mA.
- How does the L78M15ABDT-TR perform in terms of supply voltage rejection?
The device has a high supply voltage rejection of up to 56 dB.
