AN80L19RMS

AN80L19RMS – Voltage Regulators - Linear

Description

The AN80L19RMS is a buck regulator that offers both cost efficiency and reliable power conversion performance for various industrial, consumer and embedded design applications.

The AN80L19RMS is a monolithic integrated circuit capable of providing a regulated output voltage from an input voltage source ranging from 6.0V to 28V. The circuit can be synchro-nously current-mode, peak-current-mode or voltage mode control mode and can provide up to 1.5A of output current, which makes it an ideal choice for applications that require a high-efficiency buck regulator. It is designed to minimize power loss and minimize thermal stress by tracking the output current using a current-sense feedback circuit.

Features and Benefits

• Integrated sense FET with switch current 1.5A.
• Unregulated input voltage range from 6.0V to 28V.
• 500kHz to 2.5MHz PWM/PFM controllable switching frequency.
• On-chip current-limiting and thermal-shutdown protection.
• High efficiency over a wide load range.
• Excellent power supply rejection ratio.
• Low stand-by current consumption.
• Low external components.
• High PSRR, good reject of high-frequency noise.
• Thermal shutdown and current limit protection.

Applications

• Industrial and embedded design applications.
• Consumer applications.
• Living-room appliances and power tools.
• DC to DC converters.
• Satellite TV receivers.
• SMPS for computer motherboards and peripherals.

Typical Working Principle

The AN80L19RMS works by regulating an input voltage source to a specified regulated output voltage. It achieves this by using a voltage-mode, current-mode or peak-current-mode control feedback loop. Input voltage is applied to the AN80L19RMS, which switches the internal power MOSFETs on and off in order to control the output voltage level. The switching motion of the MOSFETs produces a rectangular waveform at the drain of the MOSFETs, which is then filtered and rectified to give the desired DC output voltage. The internal control loop of the AN80L19RMS ensures that the output voltage stays within a specified range over a wide variety of input voltage, output voltage, load and temperature conditions. The circuit is protected from over-current, over-voltage, short-circuit and thermal issues, thus offering high reliability for the end user.

Conclusion

The AN80L19RMS is a monolithic buck regulator providing cost efficiency, high-efficiency and reliable power conversion performance for a wide range of applications. It is designed to minimize power loss and minimize thermal stress by tracking the output current using a current-sense feedback circuit. The AN80L19RMS offers excellent power supply rejection ratio and low stand-by current consumption, making it an ideal choice for switched-mode power applications.