Overview
The L78M15ABV-DG is a precision 500 mA three-terminal positive voltage regulator produced by STMicroelectronics. This regulator is part of the L78MxxA series, which is available in various packages including TO-220 and DPAK. The L78M15ABV-DG provides a fixed output voltage of 15 V, making it suitable for a wide range of applications that require stable and regulated voltage supply.
These regulators are designed to provide local on-card regulation, eliminating the distribution problems associated with single-point regulation. They are essentially indestructible due to internal current limiting, thermal shutdown, and safe area protection. With adequate heat sinking, they can deliver over 0.5 A of output current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (VO) | 14.7 - 15.3 | V |
| Output Current (IO) | Internally limited, up to 500 mA | mA |
| Input Voltage (VI) for VO = 5 to 18 V | 35 | V |
| Input Voltage (VI) for VO = 20, 24 V | 40 | V |
| Line Regulation (ΔVO) | 100 mV (VI = 17.5 to 30 V, IO = 200 mA) | mV |
| Load Regulation (ΔVO) | 300 mV (IO = 5 to 500 mA) | mV |
| Quiescent Current (Id) | 6 mA | mA |
| Output Voltage Drift (ΔVO/ΔT) | -0.5 mV/°C | mV/°C |
| Supply Voltage Rejection (SVR) | 55 dB (VI = 15 to 25 V, f = 120 Hz, IO = 300 mA) | dB |
| Output Noise Voltage (eN) | 75 µV (B = 10 Hz to 100 kHz) | µV |
| Dropout Voltage (Vd) | 2 V | V |
| Short Circuit Current (Isc) | 240 mA (VI = 35 V, TJ = 25 °C) | mA |
| Short Circuit Peak Current (Iscp) | 700 mA (TJ = 25 °C) | mA |
| Storage Temperature Range (TSTG) | -65 to 150 °C | °C |
| Operating Junction Temperature Range (TOP) | -40 to 125 °C (AB), 0 to 125 °C (AC) | °C |
Key Features
- Output current up to 0.5 A with adequate heat sinking.
- Fixed output voltage of 15 V with ±2% tolerance.
- Thermal overload protection and short circuit protection.
- Output transition SOA (Safe Operating Area) protection.
- Internal current limiting and safe area protection.
- Guaranteed operation in an extended temperature range.
- Available in TO-220 and DPAK packages.
- Can be used with external components to obtain adjustable voltage and currents.
Applications
The L78M15ABV-DG is suitable for a wide range of applications that require a stable and regulated 15 V power supply. These include:
- Local on-card regulation in electronic devices.
- Power supplies for industrial and consumer electronics.
- Automotive systems requiring stable voltage regulation.
- Medical devices and equipment.
- Telecommunication systems.
Q & A
- What is the output voltage of the L78M15ABV-DG?
The output voltage of the L78M15ABV-DG is 15 V with a ±2% tolerance.
- What is the maximum output current of the L78M15ABV-DG?
The maximum output current is internally limited, but it can deliver up to 500 mA with adequate heat sinking.
- What are the available packages for the L78M15ABV-DG?
The L78M15ABV-DG is available in TO-220 and DPAK packages.
- Does the L78M15ABV-DG have thermal protection?
Yes, it has thermal overload protection and short circuit protection.
- What is the operating junction temperature range for the L78M15ABV-DG?
The operating junction temperature range is -40 to 125 °C for the AB version and 0 to 125 °C for the AC version.
- Can the L78M15ABV-DG be used for adjustable voltage regulation?
Yes, it can be used with external components to obtain adjustable voltage and currents.
- What is the quiescent current of the L78M15ABV-DG?
The quiescent current is 6 mA.
- What is the dropout voltage of the L78M15ABV-DG?
The dropout voltage is 2 V.
- What is the short circuit current of the L78M15ABV-DG?
The short circuit current is 240 mA at VI = 35 V and TJ = 25 °C.
- What is the storage temperature range for the L78M15ABV-DG?
The storage temperature range is -65 to 150 °C.
