Overview
The L7808CP is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78 series. This regulator is available in the TO-220 package and is designed to provide a fixed output voltage of 8 volts. It is suitable for a wide range of applications due to its robust features and versatility.
The L7808CP can deliver an output current of up to 1.5 A, making it suitable for various power requirements. It incorporates internal current limiting, thermal shut-down, and safe area protection, ensuring reliable operation and protection against overheating and short circuits.
This regulator can be used for local on-card regulation, eliminating the issues associated with single-point regulation. It can also be configured with external components to achieve adjustable voltage and current outputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 7.84 to 8.16 | V |
| Output Current | Up to 1.5 A | A |
| Input Voltage (for VO = 5 to 18 V) | 35 V | V |
| Input Voltage (for VO = 20, 24 V) | 40 V | V |
| Operating Junction Temperature Range (L78xxC, L78xxAC) | 0 to 125 °C | °C |
| Operating Junction Temperature Range (L78xxAB) | -40 to 125 °C | °C |
| Thermal Resistance Junction-Case (TO-220) | 5 °C/W | °C/W |
| Thermal Resistance Junction-Ambient (TO-220) | 50 °C/W | °C/W |
| Dropout Voltage (IO = 1 A, TJ = 25 °C) | 2 V | V |
| Output Noise Voltage (TA = 25 °C, B = 10 Hz to 100 kHz) | 10 µV/VO | µV/VO |
| Output Resistance (f = 1 kHz) | 17 mΩ | mΩ |
| Short Circuit Current (VI = 35 V, TA = 25 °C) | 0.2 A | A |
| Short Circuit Peak Current (TJ = 25 °C) | 2.2 A | A |
Key Features
- Output current up to 1.5 A
- Fixed output voltage of 8 volts
- Thermal overload protection
- Short circuit protection
- Output transition SOA protection
- 2% output voltage tolerance (A version)
- Guaranteed in extended temperature range (A version)
- Internal current limiting and safe area protection
- Able to deliver adjustable voltage and currents with external components
Applications
The L7808CP is suitable for a variety of applications, including:
- Communications equipment
- Computers and peripherals
- Industrial control systems
- Power supplies and voltage regulators
- Automotive electronics
Q & A
- What is the output voltage of the L7808CP?
The output voltage of the L7808CP is 8 volts, with a tolerance range of 7.84 to 8.16 volts at 25°C.
- What is the maximum output current of the L7808CP?
The L7808CP can deliver an output current of up to 1.5 A.
- What are the thermal protection features of the L7808CP?
The L7808CP includes thermal overload protection and internal thermal shut-down to prevent overheating.
- What is the operating temperature range for the L7808CP?
The operating junction temperature range for the L7808CP is 0 to 125°C for the C version and -40 to 125°C for the AB version.
- What is the dropout voltage of the L7808CP?
The dropout voltage of the L7808CP is 2 volts at an output current of 1 A and a junction temperature of 25°C.
- Can the L7808CP be used for adjustable voltage regulation?
Yes, the L7808CP can be used with external components to achieve adjustable voltage and current outputs.
- What is the minimum load current required for regulation?
The minimum load current required for regulation is 5 mA.
- What are the common applications of the L7808CP?
The L7808CP is commonly used in communications equipment, computers and peripherals, industrial control systems, and power supplies.
- What package types are available for the L78 series?
The L78 series, including the L7808CP, is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- Does the L7808CP have short circuit protection?
Yes, the L7808CP includes short circuit protection and output transition SOA protection.
