Overview
The L7808ABV-DG is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78 series. This regulator is available in various packages, including TO-220, TO-220FP, D²PAK, and DPAK. It is designed to provide local on-card regulation, eliminating distribution problems associated with single-point regulation. The L7808ABV-DG is particularly useful in a wide range of applications due to its robust features and reliable performance.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25 °C | 7.84 | 8 | 8.16 | V |
| Output Current (IO) | Internally limited | - | - | 1.5 A | A |
| Input Voltage (VI) | For VO = 5 to 18 V | - | - | 35 V | V |
| Input Voltage (VI) | For VO = 20, 24 V | - | - | 40 V | V |
| Thermal Resistance Junction-Case (RthJC) | D²PAK, DPAK, TO-220, TO-220FP | 3, 8, 5, 5 | - | - | °C/W |
| Thermal Resistance Junction-Ambient (RthJA) | D²PAK, DPAK, TO-220, TO-220FP | 62.5, 100, 50, 60 | - | - | °C/W |
| Dropout Voltage (Vd) | IO = 1 A, TJ = 25 °C | - | - | 2 V | V |
| Output Noise Voltage (eN) | TA = 25 °C, B = 10 Hz to 100 kHz | - | - | 10 µV/VO | µV/VO |
| Short Circuit Current (Isc) | VI = 35 V, TA = 25 °C | - | - | 0.2 A | A |
| Short Circuit Peak Current (Iscp) | TJ = 25 °C | - | - | 2.2 A | A |
| Output Voltage Drift (∆VO/∆T) | IO = 5 mA | -1.1 | - | - | mV/°C |
Key Features
- Fixed Output Voltage: The L7808ABV-DG provides a fixed output voltage of 8 V.
- High Current Capability: It can deliver up to 1.5 A of output current.
- Thermal Overload Protection: Internal thermal shut-down protects the device from overheating.
- Short Circuit Protection: The regulator includes short circuit current limiting and safe area protection.
- Low Dropout Voltage: A dropout voltage of 2 V at 1 A output current.
- Low Output Noise: Output noise voltage is 10 µV/VO from 10 Hz to 100 kHz.
- High Ripple Rejection: Excellent ripple rejection ratio, making it suitable for noisy input environments.
- Adjustable Voltage Option: Can be used with external components to obtain adjustable voltage and currents.
Applications
- Local On-Card Regulation: Ideal for providing local regulation on PCBs, reducing distribution problems.
- Power Supplies: Used in various power supply designs where a stable and regulated output voltage is required.
- Industrial Control Systems: Suitable for use in industrial control systems due to its robustness and reliability.
- Consumer Electronics: Found in consumer electronics such as audio equipment, medical devices, and other applications requiring stable DC voltage.
- Automotive Systems: Can be used in automotive systems where a reliable and stable voltage supply is crucial.
Q & A
- What is the output voltage of the L7808ABV-DG?
The output voltage of the L7808ABV-DG is 8 V.
- What is the maximum output current of the L7808ABV-DG?
The maximum output current is up to 1.5 A.
- What kind of protection does the L7808ABV-DG have?
The regulator includes thermal overload protection, short circuit protection, and safe area protection.
- What is the dropout voltage of the L7808ABV-DG?
The dropout voltage is 2 V at 1 A output current.
- Can the L7808ABV-DG be used for adjustable voltage regulation?
Yes, it can be used with external components to obtain adjustable voltage and currents.
- What are the typical applications of the L7808ABV-DG?
It is used in local on-card regulation, power supplies, industrial control systems, consumer electronics, and automotive systems.
- What are the available packages for the L7808ABV-DG?
The regulator is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- What is the thermal resistance junction-case (RthJC) for the TO-220 package?
The thermal resistance junction-case (RthJC) for the TO-220 package is 5 °C/W.
- What is the minimum load current required for regulation?
The minimum load current required for regulation is 5 mA.
- What is the output noise voltage of the L7808ABV-DG?
The output noise voltage is 10 µV/VO from 10 Hz to 100 kHz.
