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PMIC - Voltage Regulators - Linear

The ISL78301FVEAZ-T7A is a linear low-dropout (LDO) regulator that offers a wide input voltage range, low quiescent current, and ultra-fast transient response. It is designed to fulfill the demands of leading edge applications and backward compatible with existing designs. The IC features a fast start-up time, current limit protection and low dropout voltage. The adjustable output voltage range of different selection, making it an ideal choice for many low-power applications.

Application Fields

The ISL78301FVEAZ-T7A LDO regulator is suitable for a wide range of applications such as portable consumer electronics, power management, industrial, and automotive electronics. It is especially suited for low power microcontrollers and other low power circuits where the quiescent and transient power dissipation are of major importance. Furthermore, it can be used for powering general purpose logic and line drivers.

Working Principle

This linear voltage regulator consists of an internal P-channel MOSFET, voltage reference and an error amplifier. The maximum operating voltage is typically 5.5V and the maximum output current is 500mA. The device operates at 1.8V to 5.5V input voltage range and is capable of supplying a regulated output voltage up to 5V. The typical dropout voltage at 500mA is only 90mV.

The fast start-up time of around 6µs paired with low quiescent current keeps the power dissipation at a low, making it a very efficient regulator. The device is equipped with an overcurrent protection feature for improved protection to the system. In addition, the high-current limitation of 500mA allows for high-power applications with very low dropout voltage.

The integrated circuit contains a power-down logic that completely shuts down the entire circuit, when the voltage at the enable pin is less than 0.7V. This feature helps to extend battery life in portable applications. The device also features a thermal shutdown protection that activates at temperatures of 150°C.

Its small size, low power consumption, and extremely fast transient response make this IC an ideal solution for a wide range of applications including industrial, automotive, and consumer electronics.

Conclusion

The ISL78301FVEAZ-T7A is a low dropout (LDO) linear regulator designed to offer a wide input voltage range, low quiescent current, and extremely fast transient response. It is suitable for a wide range of applications such as portable consumer electronics, power management, industrial and automotive electronics. The device offers overcurrent protection and thermal shutdown protection, with a startup time of 6µs. Furthermore, its small size and low power consumption makes this IC an ideal solution for many applications.

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