L5987ATR Integrated Circuits (ICs)

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PMIC (Power Management Integrated Circuit) voltage regulators are used to manage voltages to specific levels for any given circuit applications. The L5987ATR is a DC-DC switching regulator with advanced features and improved performance. It is a highly efficient, synchronous buck voltage regulator designed for several applications.

L5987ATR is an adjustable device and has a low quiescent current (1µA), thus making it an ideal choice for portable devices to reduce the power consumption. It features a wide input voltage range (2.3V to 20V) with an adjustable output voltage range (1.2V to 18V). The maximum output current is 8A and the high efficiency up to 91% makes the L5987ATR a very suitable choice for battery operated gadgets. The device also has an under voltage lockout and overtemperature protection.

The L5987ATR can also be used to provide low voltage (from 2.3V to 5.5V) supply with a single-inductor design, making it suitable for single-cell battery-oriented applications. Another advantage is the ability to adjust the output voltage in 100mV steps with the enable pin for lower standby currents.

When used for DC-DC buck switch-mode regulators, the L5987ATR substitutes for two or more discrete components. This reduces the total cost of the circuit, bulk and weight. It also helps in reducing the risk of failure and dangers associated with electromagnetic radiations due to high frequency switching.

The working principle of the L5987ATR is quite simple. The input voltage is rectified and filtered using an LC filter, and the filtered voltage is then applied to the regulator. The inductor placed between the input and output supplies the required current. An adjustable control circuit is provided and the switching of the power stage is driven by this control circuit, where the duty cycle is dynamically adjusted to meet the requirement of the output voltage. This method helps in providing high efficiency results and improves the power flow to the output.

The applications of the L5987ATR vary from automotive applications to portable device solutions. It can be used for general battery-powered applications, power converters for DC motors, and monitoring systems inside industrial PCs. It can also be used to replace complicated wiring or as a stand-alone power supply device.

The L5987ATR is an efficient and user-friendly device which offers great solutions for DC-DC switching buck regulators. It has a wide input voltage range with adjustable output voltage, low quiescent current, and helps in reducing the total cost of the circuit. Therefore, it is the ideal choice for many applications, such as automotive and portable devices.

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