ISL95870BIRZ

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ISL95870BIRZ is an integrated circuit (IC) used in the power management industry. It is a three-terminal positive voltage regulator produced by Intersil, a trusted supplier of power ICs.

The device is designed to switch between two power sources with a single pin, making it suitable for applications ranging from USB wall adapters and other power supplies to computer or consumer electronics systems. This feature provides the user with efficient power conversion and minimized power consumption.

In terms of its application field, the ISL95870BIRZ can be used in a wide range of consumer products, such as computer systems and consumer electronics, as well as in automotive and industrial applications. Generally, it is used as an input voltage switch for controlled charging, such as cell phones, laptop computers, and other consumer electronics. As for automotive applications, it is often employed for switching between the 12-VOLT (V) and 5-VOLT (V) supply sources.

The ISL95870BIRZ is primarily intended for high current (<5A) applications and is capable of switching between a USB and main power rail. The device is also capable of bypassing up to vsense. Its small size and low power consumption makes it an ideal choice for portable applications, such as laptops and cell phones.

The ISL95870BIRZ features several characteristics that make its usage easier. The device is enabled via a logic enable pin, which provides an active low enable signal. Additionally, the integrated circuit features a slow start feature, which ensures smooth power supply start-up. Moreover, the device has an overtemperature protection threshold of 130°C, making it suitable for over-temperature conditions.

The working principle of the ISL95870BIRZ is fairly simple. When enabled, the output voltage is determined by the voltage present at the FB pin of the device. The voltage present at the FB pin is then compared to the voltage at the reference pin, and the voltage of the output must be greater than or equal to the reference voltage. If the output voltage is lower than the reference voltage, then an internal voltage regulator ensures that the output voltage is regulated back to the reference voltage.

Furthermore, the ISL95870BIRZ has a built-in current limit protection that trips when the current limit is exceeded. This is useful in situations when the load is drawing too much current and causing the output voltage to dip. In such cases, the current limit protection trips to prevent damage to the system.

Overall, the ISL95870BIRZ is a robust and efficient three-terminal positive voltage regulator that is suitable for use in a wide range of consumer products, as well as automotive and industrial applications. It is designed to switch between two power sources with a single pin and features a slow start feature and an overtemperature protection threshold of 130°C, making it ideal for over-temperature conditions. Additionally, the device includes a built-in current limit protection to ensure the safe operation of the system during high-load currents.

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