ISL91127IINZ-T

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PMIC - Voltage Regulators - DC DC Switching Regulators are widely used to convert unregulated input power levels into a constant and stable output voltage. The ISL91127IINZ-T is a high-efficiency DC-DC synchronous buck converter, which is among the latest offerings from Intersil Corporation for these applications. It is designed for low-voltage, low-power-level applications in embedded solutions. The detailed information indicated on the device’s datasheet can be used to evaluate it for use in similar power delivery or regulation applications. In this article, we will discuss the various features of the ISL91127IINZ-T as well as its application fields and working principle.

Features of the ISL91127IINZ-T

The ISL91127IINZ-T is a low-voltage DC-DC synchronous buck converter capable of delivering up to 0.7 A with a 6-mm2 footprint size and 3 mm of maximum height. It is suitable for use in space-constrained applications due to its small form factor and high-density packaging options. The device also features soft-start, output disconnect and selectable frequency options for synchronous buck converters, allowing for greater flexibility in control. It also has an operating input voltage range of 3 V up to 6 V and output voltage range of 0.6 V up to 3.3 V. Additionally, the device supports both PWM and pulse-frequency modulation modes, making it suitable for a range of power delivery and regulation applications.

Other features of the ISL91127IINZ-T includes an adjustable frequency range of 300 kHz up to 3 MHz, an internal, adjustable reference voltage of up to 200 mV and a 1% overall output accuracy. The device is equipped with over-current, thermal and under-voltage protection features, further protecting it and the applications it is used in from damage. Its switching frequency is also adjustable, allowing it to be optimized for various applications. The device is backed by a 3-V to 6-V input voltage range, making it suitable for use with a range of different voltages.

Application Fields and Working Principle of ISL91127IINZ-T

The ISL91127IINZ-T is suitable for a range of different applications, most notably in motor control and battery management systems. It is designed for a low-voltage operation and is capable of controlling the power delivery or regulation with its adjustable features such as frequency and reference voltage. It is also suitable for use in automotive applications, where it can be used to regulate the voltage of different components in the system. Alongside these applications, the device can also be used in consumer electronics, medical equipment and other embedded systems where size and efficiency are of importance.

The ISL91127IINZ-T is based around a synchronous buck conversion topology. With the synchronous topology, it is able to switch both the high and low sides at the same time, leading to higher efficiency, lower voltage drop and lower ripple voltage. In this topology, the input voltage is rectified, filtered and regulated before being fed to the output. The buck converter then controls the current, decreasing or increasing it as necessary to maintain a constant output voltage level.

The feature of adjustable frequency is possible due to the concept of duty cycle. In this topology, the duty cycle is the amount of time a switch is on versus the total time period. When the duty cycle is high, the average voltage across the load will increase, and when the duty cycle is low, the average voltage will decrease. By increasing or decreasing the frequency, it is possible to adjust the output voltage level.

The ISL91127IINZ-T is equipped with a range of features to protect the device and the application it is used in. It features over-current, thermal, and under-voltage protection that can help prevent damage from occurring in the event of any abnormal conditions. It also features an adjustable reference voltage, allowing it to be optimized for different applications.

In conclusion, the ISL91127IINZ-T is a high-efficiency DC-DC synchronous buck converter capable of delivering up to 0.7 A with a 6-mm2 footprint size and 3 mm of maximum height. It is suitable for use in a range of applications, including motor control, battery management, automotive, consumer electronics, and medical systems. The device is based around a synchronous buck conversion topology and features adjustable frequency, adjustable reference voltage, and protection features that safeguard it in the event of any abnormal conditions.

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