ISL9003IEFZ-T

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The ISL9003IEFZ-T is an adjustable linear low dropout (LDO) Voltage Regulator from Intersil Corporation. It has the ability to provide precise regulation and high efficiency in a wide range of applications, making it an ideal choice for portable systems. The ISL9003IEFZ-T is an extremely low voltage LDO, providing up to 3A continuous load current and operating from an input range of 2.25V to 15V. It also features both adjustable voltage and fixed voltage outputs with excellent line and load regulation.

The ISL9003IEFZ-T can be used in battery-powered mobile devices, wireless handsets, wireless base stations and many other battery-powered applications. It is available in TO-220-6, SOT-223-6 and SOT-363-6 packages.

Application Field

The ISL9003IEFZ-T has excellent power supply rejection and low dropout behavior, making it suitable for a wide range of applications. It can be used in battery-powered applications such as mobile phones, digital cameras, PDA\'s, and many other battery powered devices. Additionally, it can be used as a low input voltage linear regulator for powering wireless transceivers, LED drivers or microcontrollers.

Working Principle

The ISL9003IEFZ-T operates by creating a voltage reference circuit between the reference and sense pins. The reference pins are connected internally to the 2.9V reference voltage, while the sense pin is connected to the output voltage. The two voltages are compared and the difference is used to control the gate of a P-channel MOSFET connected between the input and the output.

When the input voltage is higher than the output voltage, the P-channel MOSFET conducts and current is drawn from the input. This current is regulated by the difference between the reference and sense voltages. When the input voltage is lower than the output voltage, the P-channel MOSFET stops conducting and no current is drawn from the input, thus allowing the output voltage to remain regulated.

The ISL9003IEFZ-T also includes a slew rate control circuit, which ensures that the output voltage will not exceed the specified maximum output voltage. This prevents the output voltage from being higher than the input voltage, which could cause the Device to enter thermal shutdown.

The ISL9003IEFZ-T is protected against over-current, over-voltage, and thermal overload. In the event of a fault, the output will be shut down and a flag signal is asserted, to indicate the fault condition.

Conclusion

The ISL9003IEFZ-T is an adjustable low dropout Voltage Regulator from Intersil Corporation, ideal for powering a wide range of battery-powered devices. It features excellent power supply rejection and low dropout behavior, making it suitable for use in mobile phones, digital cameras, PDA\'s, and many other battery powered devices. Additionally, it has built-in protections against over-current, over-voltage, and thermal overload. This makes it an ideal choice for powering wireless transceivers, LED drivers or microcontrollers.

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