Overview
The L4940V5 is a three-terminal positive voltage regulator produced by STMicroelectronics. It is part of the L4940 series, which is known for its very low dropout voltage and high current capability, making it suitable for a wide range of industrial and consumer applications. The regulator is available in various packages, including TO-220, TO-220FP, and D²PAK, and offers fixed output voltages such as 5V, 8.5V, and 12V. Its low input/output voltage drop and internal protection features make it particularly useful for battery-powered equipment, reducing power consumption and prolonging battery life.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Min) | 6 | V |
| Input Voltage (Max) | 17 | V |
| Output Voltage (Fixed) | 5 | V |
| Dropout Voltage (Max) | 900 mV | mV |
| Output Current (Max) | 1.5 A | A |
| Tolerance | ±2% | % |
| Operating Temperature Range | -40°C to +150°C | °C |
| Regulator Topology | Fixed | |
| Quiescent Current | 50 mA | mA |
| No. of Outputs | Single | |
| Load Regulation | 25 mV | mV |
| Line Regulation | 10 mV | mV |
| Package Style | TO-220-3 (TO-220AB) | |
| Mounting Method | Flange Mount |
Key Features
- Precise 5V output voltage
- Low dropout voltage (450 mV typical at 1 A)
- Very low quiescent current
- Thermal shutdown
- Short-circuit protection
- Reverse polarity protection
- Internal current limiting and anti-saturation circuit
- Safe area protection
Applications
The L4940V5 is suitable for a wide range of industrial and consumer applications, particularly in battery-powered equipment. Its low dropout voltage and high current capability make it ideal for reducing power consumption and prolonging battery life. It can be used in on-card regulation, distributed power supplies, and secondary regulation for switch-mode power supplies.
Q & A
- What is the output voltage of the L4940V5? The output voltage of the L4940V5 is 5V.
- What is the maximum input voltage for the L4940V5? The maximum input voltage for the L4940V5 is 17V.
- What is the maximum output current of the L4940V5? The maximum output current of the L4940V5 is 1.5 A.
- What are the available packages for the L4940V5? The L4940V5 is available in TO-220, TO-220FP, and D²PAK packages.
- What protection features does the L4940V5 have? The L4940V5 has thermal shutdown, short-circuit protection, reverse polarity protection, internal current limiting, and anti-saturation circuit.
- What is the operating temperature range of the L4940V5? The operating temperature range of the L4940V5 is -40°C to +150°C.
- What is the quiescent current of the L4940V5? The quiescent current of the L4940V5 is up to 50 mA.
- Is the L4940V5 suitable for battery-powered equipment? Yes, the L4940V5 is particularly suitable for battery-powered equipment due to its low dropout voltage and high current capability.
- What is the dropout voltage of the L4940V5? The dropout voltage of the L4940V5 is up to 900 mV at 1.5 A.
- Does the L4940V5 have load and line regulation? Yes, the L4940V5 has load regulation of 25 mV and line regulation of 10 mV.
