JANTXV1N4494

JANTXV1N4494 is a kind of integrated circuit designed to provide efficient voltage regulation with high power handling capacity and overall performance. It is a silicon monolithic integrated circuit regulator with an N-Channel depletion mode MOSFET used as its output device. The device is capable of providing load current up to 2.2A with short circuit protection. The device packages a 5V precision voltage reference circuit and a single N-Channel depletion mode MOSFET regulator.

Application Field

The device is designed for use in adjustable voltage-regulating applications and particularly suited for low output voltage applications. For applications such as portable and hand-held systems where space is limited, JANTXV1N4494 is a great choice. It is most suited for low power, low output ripple, small size applications in which efficiency and low cost are important considerations. Typical applications include:

• Small DC/DC Converters
• Post Regulation for On-Board Linear Regulators
• Battery-Powered Equipment
• Battery Chargers and Freezers
• Notebook Computer Adapters

Working Principle

The JANTXV1N4494 is a voltage-controlled device, which features a current sense amplifier and reference circuit as its core components. The device is able to regulate an output voltage in a wide range, from (VOUTmin) to (VOUTmax). The reference circuit maintains a precise and stable 5V output voltage, which is then amplified to create the non-inverting input of the amplifier, known as the error voltage V_ERR. The inverting input, called the regulation voltage V_REG, is connected directly to the output voltage. The device will adjust the output voltage to keep the voltage difference between the two input voltage equal to zero. The operational amplifier will control the gate voltage of the MOSFET in order to adjust the output voltage to match the regulation voltage V_REG. The current sense amplifier is used to monitor the load current, and will provide protection when the current exceeds the current limit.

Conclusion

JANTXV1N4494 is a high performance voltage regulator device specifically designed for low power, low output ripple and small size applications. Its high power handling capacity and superior overall performance make it a great choice for portable and hand-held systems. Its voltage control logic and current sense amplifier make the device suitable for a wide variety of applications, such as battery-powered equipment and notebook computer adapters.