ISL95906IIZ-T

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The ISL95906IIZ-T is a high current, low voltage dropout voltage regulator for use in a variety of special purpose applications. The device is capable of regulating output voltages ranging from 0.5V to 2.5V. It utilizes a selectable low quiescent current, low noise operational amplifier that provides high accuracy output regulation over temperature which is ideal for automotive, digital power, and other applications. The device also features an adjustable programmable over-current protection, temperature protection and reverse voltage protection.

The ISL95906IIZ-T consists of an EN input block, an error amplifier, compensator, current source (CS) and over-current protection (OCP) block. The input stage has a wide supply voltage range of 3.0V to 20V, allowing for flexibility and wide-ranging configurations. The current source sets the output voltage of the regulator across an external resistor divider, R1 and R2. The resistor divider can be selected to represent a specific output voltage, which will range from 0.5V to 2.5V depending on the value of the resistors. The EN terminal enables the device and allows the device to enter power-down mode when the EN pin is pulled low.

The error amplifier performs the error comparison between the actual output voltage and the reference voltage. If a difference exists, the error amplifier produces an output voltage to the compensator. The GAIN pin determines the open-loop gain of the regulator. The compensator block generates the PWM signal which is used to drive the PWM output stage. The PWM output stage is what controls the output voltage. The CS sets the current limit to the output stage. This current stage can be set to the desired level via the CS pin. The OCP block protects the output stage when the set current limit is exceeded.

The ISL95906IIZ-T is designed to be used in a variety of special purpose applications including, but not limited to, mixed analog/digital circuits, LCD, automotive systems, and power supplies. By utilizing its selectable low quiescent current, low noise, and high accuracy output regulation over temperature, the ISL95906IIZ-T is ideal for use in all of these applications. This device is capable of providing a wide range of output voltages and currents, making it a good choice for applications requiring precise and stable voltage regulation.

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