Overview
The LM217T, produced by STMicroelectronics, is a monolithic integrated circuit designed as a positive adjustable voltage regulator. It is available in various packages, including TO-220, TO-220FP, D²PAK, and SOT223. This regulator is capable of supplying more than 1.5 A of load current with an output voltage adjustable over a range of 1.2 to 37 V. The device is exceptionally easy to use, thanks to its nominal output voltage selection via a resistive divider, eliminating the need for multiple fixed regulators.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage Range | 1.2 | - | 37 | V |
| Output Current | - | - | 1.5 | A |
| Line Regulation | 0.01 | 0.02 | 0.05 | %/V |
| Load Regulation (VO ≤ 5 V) | 5 | - | 15 | mV |
| Load Regulation (VO ≥ 5 V) | 0.1 | - | 1 | % |
| Adjustment Pin Current | 50 | 100 | - | µA |
| Reference Voltage | 1.2 | 1.25 | 1.3 | V |
| Output Noise Voltage | - | - | 0.003 | % |
| Supply Voltage Rejection (SVR) | 65 | - | 80 | dB |
| Operating Temperature | -25 | - | 150 | °C |
| Package | - | - | TO-220-3 | - |
Key Features
- Output voltage range: 1.2 to 37 V
- Output current in excess of 1.5 A
- High line and load regulation: 0.01% to 0.05% per volt and 5 mV to 1% respectively
- Floating operation for high voltages
- Complete series of protections: current limiting, thermal shutdown, and SOA control
- Internal reference voltage of 1.25 V between the output and adjustment terminals
- Supply voltage rejection (SVR) of up to 80 dB
- Operating temperature range: -25°C to 150°C
Applications
The LM217T is versatile and can be used in a variety of applications, including:
- Power supplies requiring adjustable output voltages
- Voltage regulation in industrial and automotive systems
- Battery chargers and power management systems
- Electronic devices requiring stable and adjustable voltage supplies
- High-voltage applications where floating operation is necessary
Q & A
- What is the output voltage range of the LM217T?
The output voltage range of the LM217T is from 1.2 V to 37 V.
- What is the maximum output current of the LM217T?
The LM217T can supply more than 1.5 A of load current.
- What are the key protection features of the LM217T?
The LM217T includes current limiting, thermal shutdown, and SOA (Safe Operating Area) control.
- What is the internal reference voltage of the LM217T?
The internal reference voltage is 1.25 V between the output and adjustment terminals.
- What is the operating temperature range of the LM217T?
The operating temperature range is from -25°C to 150°C.
- What packages are available for the LM217T?
The LM217T is available in TO-220, TO-220FP, D²PAK, and SOT223 packages.
- How is the output voltage adjusted on the LM217T?
The output voltage is adjusted using a resistive divider.
- What is the supply voltage rejection (SVR) of the LM217T?
The SVR of the LM217T is up to 80 dB.
- Is the LM217T RoHS compliant?
Yes, the LM217T is RoHS compliant.
- What are some common applications of the LM217T?
Common applications include power supplies, industrial and automotive systems, battery chargers, and electronic devices requiring stable and adjustable voltage supplies.
