Overview
The L7815CT is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78 series. This regulator is designed to provide a stable output voltage of 15V and is available in various packages including TO-220, TO-220FP, D²PAK, and DPAK. It is widely used for local on-card regulation, eliminating the issues associated with single-point regulation. The L7815CT features internal current limiting, thermal shut-down, and safe area protection, making it highly reliable and robust.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 14.4 - 15.6 | V |
| Output Current | Up to 1.5 A | A |
| Input Voltage Range | 17.5 to 30 V | V |
| Dropout Voltage | 2 V | V |
| Output Noise Voltage | 10 µV/VO | µV/VO |
| Output Resistance | 19 mΩ | mΩ |
| Short Circuit Current | 0.2 A | A |
| Short Circuit Peak Current | 2.2 A | A |
| Output Voltage Drift | -1 mV/°C | mV/°C |
| Operating Junction Temperature Range | 0 to 125 °C | °C |
| Storage Temperature Range | -65 to 150 °C | °C |
Key Features
- Fixed output voltage of 15V with 2% tolerance (A version)
- High current capability up to 1.5 A
- Internal current limiting and thermal shut-down
- Safe area protection
- Low dropout voltage of 2 V
- Low output noise voltage of 10 µV/VO
- High ripple rejection ratio
- Available in TO-220, TO-220FP, D²PAK, and DPAK packages
Applications
- Local on-card regulation in various electronic systems
- Power supplies for industrial, automotive, and consumer electronics
- Voltage regulation in medical devices and equipment
- Use in adjustable voltage and current applications with external components
Q & A
- What is the output voltage of the L7815CT?
The output voltage of the L7815CT is 15V with a tolerance of 2% (14.4V to 15.6V).
- What is the maximum output current of the L7815CT?
The maximum output current of the L7815CT is up to 1.5 A.
- What are the package options for the L7815CT?
The L7815CT is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- Does the L7815CT have built-in protection features?
Yes, the L7815CT features internal current limiting, thermal shut-down, and safe area protection.
- What is the dropout voltage of the L7815CT?
The dropout voltage of the L7815CT is 2 V.
- What is the operating junction temperature range of the L7815CT?
The operating junction temperature range of the L7815CT is 0 to 125 °C.
- Can the L7815CT be used for adjustable voltage regulation?
Yes, the L7815CT can be used with external components to obtain adjustable voltage and currents.
- What is the minimum load current required for regulation?
The minimum load current required for regulation is 5 mA.
- What is the ripple rejection ratio of the L7815CT?
The ripple rejection ratio of the L7815CT is typically around 65 dB at 120 Hz with an output current of 500 mA.
- Is the L7815CT suitable for high-temperature applications?
Yes, the L7815CT has a storage temperature range of -65 to 150 °C and an operating junction temperature range of 0 to 125 °C.
