LMS5258MFX-1.2/NOPB

The LMS5258MFX-1.2/NOPB is a high-performance one-channel linear voltage regulator. It is part of the Voltage Regulators - Linear group of Power Management ICs (PMICs) offering high-efficiency power management solutions. The regulator operates with a wide input voltage range of up to 25V, and enables efficient current and voltage regulation. It supports an adjustable output voltage range spanning from 2.5V to 25V, making the device suitable for a variety of applications.

Features

• High-efficiency current and voltage regulation
• Wide input voltage range up to 25V
• Adjustable output voltage range spanning from 2.5V to 25V
• Thermal shutdown protection
• Over-current protection
• Thermal protection with hysteresis
• Under-voltage lockout (UVLO) protection

Applications

The LMS5258MFX-1.2/NOPB is suitable for applications requiring efficient current and voltage regulation. This can include audio amplifiers, power converters, battery chargers, portable electronic devices, automotive systems, and industrial automation. Additionally, the device is a suitable power solution for applications requiring multiple voltage rails such as datacom and telecom infrastructure systems.

Working Principle

The LMS5258MFX-1.2/NOPB operates according to a standard linear voltage regulator architecture. It consists of a negative input voltage source, a compatible positive input source, error amplifier, reference voltage source, series pass element, output voltage sensing circuit and feedback loop.

The negative input voltage source is connected to the series pass element (the power switch) and both are connected to the reference voltage source. The reference voltage source is generally a voltage divider, while the series pass element is a field-effect transistor (FET or MOSFET). The output voltage sensing circuit senses the output voltage and compares it to the reference voltage. When the output voltage is higher than the reference voltage, the error amplifier turns off the power switch via the gate voltage, and when the output voltage is lower than the reference voltage, the error amplifier turns on the power switch via the gate voltage. The output voltage is then regulated according to the user-set reference voltage. The feedback loop makes sure that the output voltage remains stable even when under extended heavy load.

Conclusion

The LMS5258MFX-1.2/NOPB is a high-performance one-channel linear voltage regulator offering high-efficiency power management solutions with a wide input voltage range, and adjustable output voltage range. It is suitable for audio amplifiers, power converters, battery chargers, portable electronic devices, automotive systems, and industrial automation applications. The device operates according to a standard linear voltage regulator architecture, where the input voltage is regulated by an error amplifier and series pass element. The output voltage is then regulated according to the reference voltage set by the user.