DC-DC Voltage Regulator IC 18V 1.5A L7818
The L7818 is a DC-DC voltage regulator IC capable of converting an input voltage up to 35V into a stable 18V output at currents up to 1.5A. It features built-in thermal shutdown and short-circuit protection, making it ideal for various applications in both hobbyist and professional electronics projects.
Package Includes:
- 1 x L7818 DC-DC voltage regulator IC
Features:
- Input voltage range up to 35V
- Fixed output voltage of 18V
- Maximum output current of 1.5A
- Built-in thermal shutdown and short-circuit protection
- Low dropout voltage
- Internal current limiting and thermal limiting
- Requires minimal external components for stability
- Available in various package types, including TO-220
- Operating temperature range from -40°C to 125°C
- Applications include audio amplifiers, motor controllers, and MCU power supplies
- Easy to use and integrate into circuits
Principle of Work:
The IC uses an internal pass transistor and error amplifier to regulate the output voltage. It compares the output to an internal reference and adjusts the transistor to maintain 18V. If temperature or load exceeds limits, protection circuits shut the IC down safely.
Pinout of the Module:
- Vin: Input voltage pin (20V to 35V recommended)
- GND: Ground connection
- Vout: Regulated 18V output
Applications:
- Power supply for audio amplifiers
- Power supply for microcontrollers
- Power supply for sensors and analog circuits
- Battery charging circuits
- Industrial control systems
Circuit:
Usage Notes:
- Use a heatsink to avoid thermal shutdown
- Keep input voltage between 20V and 30V for safe operation
- Do not exceed operating temperature range: -40°C to +125°C
- Store within -65°C to +150°C
Library:
No library needed
Code:
No code needed
Technical Details:
- Output voltage: 18V
- Output current: up to 1.5A
- Input voltage: up to 35V
- Dropout voltage: 2V (typical)
- Quiescent current: 5mA (typical)
- Thermal shutdown protection
- Overcurrent and short-circuit protection
- Operating temperature: -40°C to +125°C
- Storage temperature: -65°C to +150°C
- Package: TO-220
Comparisons:
The L7818 and LM317 both offer voltage regulation with built-in protections, but differ in the following ways:
- Output Voltage: LM317 is adjustable; L7818 is fixed at 18V.
- Current Capability: Both offer 1.5A; some LM317 models support higher current with external components.
- Dropout Voltage: LM317 generally has lower dropout voltage, improving efficiency.
- Flexibility: LM317 is more versatile; L7818 is easier for fixed 18V applications.
Features:
- Input voltage range up to 35V
- Fixed output voltage of 18V
- Maximum output current of 1.5A
- Built-in thermal shutdown and short-circuit protection
- Low dropout voltage
- Internal current limiting and thermal limiting
- Requires minimal external components for stability
- Available in various package types, including TO-220
- Operating temperature range from -40°C to 125°C
- Applications include audio amplifiers, motor controllers, and MCU power supplies
- Easy to use and integrate into circuits
Principle of Work:
The IC uses an internal pass transistor and error amplifier to regulate the output voltage. It compares the output to an internal reference and adjusts the transistor to maintain 18V. If temperature or load exceeds limits, protection circuits shut the IC down safely.
Pinout of the Module:
- Vin: Input voltage pin (20V to 35V recommended)
- GND: Ground connection
- Vout: Regulated 18V output
Applications:
- Power supply for audio amplifiers
- Power supply for microcontrollers
- Power supply for sensors and analog circuits
- Battery charging circuits
- Industrial control systems
Circuit:
Usage Notes:
- Use a heatsink to avoid thermal shutdown
- Keep input voltage between 20V and 30V for safe operation
- Do not exceed operating temperature range: -40°C to +125°C
- Store within -65°C to +150°C
Library:
No library needed
Code:
No code needed
Technical Details:
- Output voltage: 18V
- Output current: up to 1.5A
- Input voltage: up to 35V
- Dropout voltage: 2V (typical)
- Quiescent current: 5mA (typical)
- Thermal shutdown protection
- Overcurrent and short-circuit protection
- Operating temperature: -40°C to +125°C
- Storage temperature: -65°C to +150°C
- Package: TO-220
Comparisons:
The L7818 and LM317 both offer voltage regulation with built-in protections, but differ in the following ways:
- Output Voltage: LM317 is adjustable; L7818 is fixed at 18V.
- Current Capability: Both offer 1.5A; some LM317 models support higher current with external components.
- Dropout Voltage: LM317 generally has lower dropout voltage, improving efficiency.
- Flexibility: LM317 is more versatile; L7818 is easier for fixed 18V applications.