ISL62881DHRTZ-T

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Integrated System LLater (ISL) 62881DHRTZ-T is a low-voltage step-down, monolithic, non-synchronous buck regulator designed primarily for battery powered applications. It offers high current output, high efficiency, thermal protection and low quiescent current that enables it to deliver higher currents at lower output voltages or further extended runtimes.

ISL62881DHRTZ-T is a special purpose voltage regulator that can be used to regulate the voltage of power supplies. This device operates in a step-down ‘buck’ configuration and is capable of producing an adjustable output voltage from input voltages up to 28V. It is specifically designed for use in portable electronics and low-power applications where size, robustness, and reliability are essential.

ISL62881DHRTZ-T offers overcurrent protection with adjustable overcurrent protection (OCP) latch circuitry, providing optimal protective failure response for device and system-level safety. The thermal sensing circuit monitors die temperature and reduces gain to protect device during continuous overload or over-temperature conditions. Additionally, the device features a reset function with low active-high reset signal, which is compatible with the processor’s reset-on-powerup sequence.

The device also incorporates a P-channel MOSFET connected to the output. This MOSFET is used to regulate the current at the output side by controlling the input voltage. It is responsible for maintaining a constant output voltage in the presence of load changes. This feature is especially useful in devices such as digital cameras, portable media players, and smart phones, which typically encounter heavy load demands.

The working principle of ISL62881DHRTZ-T is based on the concept of Pulse Width Modulation (PWM). In this technique, the duty cycle of the pulses is adjusted so that the average voltage output is maintained at a desired level. The device uses an internal feedback circuit to compare the output voltage with an internal reference voltage. Once the correction is available, the internal controller modulates the output of the PWM to achieve the desired result.

ISL62881DHRTZ-T is widely used in a variety of applications including portable electronics, consumer products, automotive electronics, and power converters. The device is designed to provide low-noise, high-efficiency solutions that are important for keeping energy consumption and heat generation to minimum in these types of applications. Its wide input voltage range, low quiescent current, overtemperature and overcurrent protection provide reliable protection and high performance in these systems.

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